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产品型号YSS915-MZ的Datasheet PDF文件预览

YSS915  
KP2V2  
Karaoke Processor 2 for Video disc player  
INTRODUCTION  
YSS915 (KP2V2) is an LSI for processing Karaoke voice signals.  
This LSI has an A/D converter (1 channel) for the microphone echo, and a memory for the microphone echo and  
key control. These features allow achieving the functions needed for the Karaoke system by using only one LSI  
chip. As for the microphone echoes, many other types of echoes are available in addition to ordinary ones so that  
YSS915 is applicable to various uses.  
In addition to these Karaoke programs, YSS915 is able to provide the Movie & Music programs, with which the  
surround effect is applied to the movie and music sources for giving the users more enjoyment.  
YSS915 is pin compatible with and register compatible with YSS903 (KP2V).  
FEATURES  
[ Fundamental Functions ]  
1) Karaoke program  
Key Control (Control by 50 cents in +/- 600 cent range, +/- one octave, etc.)  
Voice Cancel  
Microphone Echo  
Normal microphone echo (174 msec or less (fs = 44.1 kHz))  
Stereo-Echo/ Reverb-Echo  
Microphone Key Control (+/- 10 cents, +/- 20 cents, +/- 400 cents, +/- 700 cents and +/- 1 octave)  
Microphone wide surround  
Tone Control  
Bass, Mid-tone, Treble (0 to +/- 10 dB at 2 dB steps)  
Surround  
Yamaha's original wide surround technology  
2) Movie and music program  
Surround  
Initial reflection sound synthesizing system  
Yamaha's original wide surround technology  
Tone Control  
Bass, Mid-tone, Treble (0 to +/- 10 dB at 2 dB steps)  
[ I/O Interface ]  
Digital signal inputs  
: 2 channels (16/18/20/24 bits)  
: 2 channels (16/18/20/24 bits)  
: 1 channel ( for the microphone )  
Digital signal outputs  
Analog signal input  
Microprocessor interface : Serial four line system  
Through-mode : Digital input is outputted without any processing  
(Correspond with fs = 96 kHz 24 bit DVD format)  
[ Others ]  
Pin/register upper compatible with YSS903 (KP2V)  
Sampling frequency  
Package  
: 32, 37.8, 44.1, 48 kHz or correspond with 96 kHz through-mode.  
: 28 pin SOP ( YSS915-MZ )  
YSS915 CATALOG  
CATALOG No:LSI-4SS915A50  
2007.7  
YSS915  
Difference between YSS903 and YSS915  
1. No built-in DAC.  
(Refer to the process flow chart in “OPERATIONS”.)  
2. Connectable directly with MSB justified data output ADC.  
(Refer to “Format 4” of “4. Digital audio interface” in “ PIN FUNCTIONS”.)  
3. Microphone interface pins CDI and CDO can be connected on the board.  
This feature allows to reduce the number of ports by one.  
(Refer to “5. Microcomputer interface” in “ PIN FUNCTIONS”.)  
4. Input fader has been added for the microphone echo.  
This feature allows to apply fade-in/fade-out control to the microphone echo through designation  
with one bit from the microcomputer.  
(Refer to “1. Karaoke program” in “ OPERATIONS”, and “3) VCR ($02)” of “1. Functions” in  
“REGISTERS”.)  
5. Zero level detection function has been added for digital audio output.  
YSS915 outputs “0” at the pin “ZERO” when an audio input has been zero for a certain period.  
This signal can be used to improve S/N ratio by muting the output of external DAC.  
(Refer to “6. Others” in “ PIN FUNCTIONS”.)  
6. An output port PO has been added for controlling peripheral devices.  
The port “PO” can be used, as an example, to control the gain of audio output amplifier through this  
LSI from the microcomputer.  
(Refer to “6. Others” in “ PIN FUNCTIONS”.)  
7. A mode with extended band width for microphone echo has been newly added.  
Two types of cut-off frequency have been added for the low pass filter.  
(Refer to “7) RVR ($06)” and “11) MDR ($1C)” of “1. Functions” in “REGISTERS”.)  
8. Internal DSP has been given the operation accuracy of 20 bits.  
Internal multiplier-accumulator become 20bit*13bit=24bit therefore overall bit accuracy become  
improved from 18bit(YSS903) to 20bit(YSS915).  
In through-mode which internal DSP is not used for processing the accuracy of input data is  
maintained to output.  
2
YSS915  
PIN CONFIGURATION  
1
2
28  
27  
26  
25  
24  
23  
22  
SDSY  
CDO  
DI  
BCI  
DO  
L/R  
3
CDI  
/SCK  
/CS  
P0  
4
5
DVDD1  
BCO  
6
DVSS1  
7
XISEL/ZERO  
DVSS2  
21  
20  
8
AVDD  
PLLC  
AVSS  
ADC1  
ADC2  
VREF  
9
DEPI  
10  
11  
12  
13  
14  
19  
18  
DVDD2  
/IC  
17  
16  
15  
XI  
AOR  
AOL  
MICIN  
< 28pin SOP Top View >  
3
YSS915  
PIN FUNCTION  
No.  
Name  
I/O (*1)  
Function  
Serial data  
1
DI  
BCI  
I+  
Digital audio input  
Digital audio input  
Digital audio output  
Digital audio output  
2
I+  
Bit clock  
3
DO  
O/I+  
Serial data / Test input pin (*2)  
Word clock  
4
L/R  
O
5
DVDD1  
BCO  
-
Power supply, +5 V (for digital system)  
Digital audio output Bit clock  
6
O
7
DVSS1  
AVDD  
PLLC  
AVSS  
ADC1  
ADC2  
VREF  
MICIN  
AOL  
-
Ground (for digital system)  
8
-
Power supply, +5 V (for analog system)  
Connecting resistor and capacitor for PLL  
Ground (for analog system)  
9
A
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
-
A
Connecting capacitor for ADC  
A
Connecting capacitor for ADC  
OA  
Referential voltage output  
IA  
Analog input, analog voice signal for microphone channel  
Outputs analog voice signal for L channel  
Outputs analog voice signal for R channel  
External clock input  
OA  
AOR  
OA  
XI  
I
/IC  
I
Initial clear (Low active)  
DVDD2  
DEPI  
DVSS2  
XISEL/ZERO  
P0  
-
Power supply, +5 V (for digital system)  
De-emphasis control (H : On, L : Off)  
Ground (for digital system)  
I
-
I+/O  
O/I+  
I
Switches master clock rate/ZERO output  
P0 output / Test input pin (*2)  
/CS  
Microcomputer interface input Chip select  
Microcomputer interface input Serial clock  
Microcomputer interface input Serial data  
Microcomputer interface output Serial data  
/SCK  
CDI  
I
I
CDO  
SDSY  
O+  
I+  
Digital audio input  
Word clock  
(*1) + : Built in pull-up circuit  
A : Analog pin  
(*2) WARNING: The LSI implements the test mode in the case of setting DO pin or PO pin to low level when  
/IC (initial clear) turn from L to H. Please never make DO and PO pin to low level at the time of the /IC’s  
changing. And please note that does not connect the pin with built-in pull-up circuit to another pin with  
pull-down circuit. Because of the pull-up impedance is high as 100k- 1M, and it would be pull-down if  
it were connect to pull-down circuit.  
4
YSS915  
BLOCK DIAGRAM  
This LSI has two input channels (L and R) and two output channels (L and R) for digital audio interface. It also has a  
one bit Delta-Sigma type AD converter 1 channel (microphone) that performs Delta-Sigma modulation at its analog  
block, and decimation/interpolation of 128 times at its DSP.  
Karaoke audio signal is processed by DSP for processing Karaoke audio signal and RAM for delay.  
For the details of Karaoke audio signal processing, please refer to "OPERATIONS".  
The parameters of this LSI are set through CPU interface. For the details of the parameters, please refer to  
"REGISTERS".  
/CS  
CDI  
/SCK  
CDO  
P0  
DEPI  
KP2V2  
CPU interface  
SDSY, DI, BCI  
DO, L/R, BCO  
ZERO  
Digital I/O  
Interface  
RAM  
for delay  
DSP  
Program ROM  
MICIN  
/IC  
Analog block  
Clock  
AOL  
AOR  
XISEL  
generator  
VREF  
PLLC  
XI  
ADC2  
ADC1  
MODES  
Name of mode Code  
Description  
The functions of KP2 (YSS216B) can be used. The registers are compatible, except  
that the coefficient registers (addresses $27 and $30 to $33) of KP2 that controls the  
analog audio input and analog microphone echo output cannot be used because  
YSS903 does not have these ports.  
KP2  
N
standard mode  
KP2V  
E
Every function of this device can be used.  
extended mode  
5
YSS915  
PIN FUNCTIONS  
1. Clock signal  
XI, XISEL, PLLC  
Operation of this LSI requires input of clock with frequency of 384 fs (fs : sampling frequency) or 256 fs to the XI  
pin.  
Keep the XISEL pin open when using with the 384 fs clock. (XISEL pin is pulled up internally.)  
Pull down XISEL pin to the digital ground through 4.7 k ohm resistor when using with the 256 fs clock.  
The sampling frequency can be selected in the range from 32 kHz to 48 kHz.  
The sampling frequency is specified with OPR register ($00). (The sampling frequency of fs = 32 or 48 kHz can be  
specified only KP2V Extended mode.)  
Sampling  
XI input frequency  
Available mode  
frequency (fs)  
384fs  
256fs  
(See Note.)  
32.0 kHz  
37.8 kHz  
44.1 kHz  
48.0 kHz  
12.288 MHz  
14.5152 MHz  
16.9344 MHz  
18.432 MHz  
8.192 MHz  
9.6768 MHz  
11.2896 MHz  
12.288 MHz  
E
N, E  
N, E  
E
Note:  
N = KP2 standard mode  
E = KP2V extended mode  
In addition, the thing that input 37MHz in XI by a maximum is possible in only through-mode.  
Connect a resistor and capacitor to PLLC pin as shown below for adjustment of PLL in the LSI.  
PLLC  
KP2V2  
2. Initial clear  
/IC  
This LSI requires initial clear at power on. The initial clear is performed by inputting "L" to /IC pin.  
/IC  
Min 2msec  
6
YSS915  
3. Analog audio interface  
MICIN, ADC1, ADC2, AOL, AOR, VREF  
This LSI has a one channel (MIC input) of Delta-Sigma type A/D converter, thus requiring the external circuits as  
described below.  
The output of AOL and AOR can be used as a direct signal from the microphone because the volume of the signal  
is controlled as analog signal which is outputted from AOL and AOR.  
Analog input section  
Analog output section  
Other section  
ti  
KP2V2  
VREF  
MICIN  
ADC1  
ADC2  
MIC  
AOL  
AOL  
AOR  
AOR  
AVDD  
AVSS  
7
YSS915  
4. Digital audio interface  
SDSY, BCI, DI, L/R, DO, BCO  
-1) Digital audio signal is inputted through BCI, SDSY and DI pins using the following format.  
BCI  
SDSY  
DI(16bit)  
DI(18bit)  
15 14 13 12 11 10  
17 16 15 14 13 12 11 10  
9
9
9
9
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
0
0
0
0
15 14 13 12 11 10  
17 16 15 14 13 12 11 10  
9
9
9
9
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
0
0
0
0
19 18 17 16 15 14 13 12 11 10  
23 22 21 20 19 18 17 16 15 14 13 12 11 10  
Lch  
19 18 17 16 15 14 13 12 11 10  
23 22 21 20 19 18 17 16 15 14 13 12 11 10  
Rch  
DI(20bit)  
DI(24bit)  
-2) Digital audio signal is outputted through BCO, L/R, and DO pins using the following format.  
BCO  
L/R  
DO(16bit)  
DO(18bit)  
15 14 13 12 11 10  
17 16 15 14 13 12 11 10  
9
9
9
9
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
0
0
0
0
15 14 13 12 11 10  
17 16 15 14 13 12 11 10  
9
9
9
9
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
0
0
0
0
19 18 17 16 15 14 13 12 11 10  
23 22 21 20 19 18 17 16 15 14 13 12 11 10  
Lch  
19 18 17 16 15 14 13 12 11 10  
23 22 21 20 19 18 17 16 15 14 13 12 11 10  
Rch  
DO(20bit)  
DO(24bit)  
-3) The digital audio interface is made compatible with the following format with OPR register ($00) and DAR register  
($04).  
OPR  
[5]  
DAR  
[3:2]  
MDR Available  
Format  
BCI  
BCO  
[3]  
mode  
Format1  
Format2  
-
64fs  
64fs  
1
0
0
0
0
0
*
0
1
2
3
*
0
0
N, E  
N, E  
32-96fs  
64fs  
48fs  
Format3  
Format4  
BCI  
64fs  
0
1
E
E
-
N=KP2 standard mode  
E=KP2V extended mode  
Format1  
Use this format when digital audio input is not used.  
Format2  
Use this format when digital audio input is used.  
BCI is able to accept any frequency between including 96fs from 32fs, while BCO outputs only 64 fs.  
BCI, SDSY and DI signals must be synchronized with XI clock.  
Format3  
Use this format when digital audio input is used.  
BCI input signal is passed to the BCO output, being inverted.  
SDSY input signal is passed to the L/R output, being delayed by 2.5 clocks of BCI.  
BCI, SDSY and DI signals must be synchronized with XI clock.  
8
YSS915  
Format4  
This format is used to interface with the A/D converter which outputs data MSB justified.  
Connect BCO pin of this LSI to the bit clock input pin of the A/D converter, L/R pin to LR clock input pin of the  
converter, and DI pin to data output pin of the converter.  
BCO outputs 64 fs without regarding to the value of DAR[3:2].  
Keep the pins BCI and SDSY open.  
The format 4 is as described below.  
0
1
31  
0
1
BCO  
L/R  
MSB  
LSB  
MSB  
LSB  
DI  
DO(16bit)  
15 14 13 12 11 10  
17 16 15 14 13 12 11 10  
9
9
9
9
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
0
0
0
0
15 14 13 12 11 10  
17 16 15 14 13 12 11 10  
9
9
9
9
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
1
1
1
1
0
0
0
0
DO(18bit)  
19 18 17 16 15 14 13 12 11 10  
23 22 21 20 19 18 17 16 15 14 13 12 11 10  
Lch  
19 18 17 16 15 14 13 12 11 10  
23 22 21 20 19 18 17 16 15 14 13 12 11 10  
Rch  
DO(20bit)  
DO(24bit)  
-4) Length of data word of the digital audio signal can be set by the DAR register ($04) to 16, 18, 20 or 24 bits (only  
in KP2V extended mode). When the data word is 24 bit long, only upper 20 bits are used for processing internal  
signal.  
Length of inputted  
word  
DAR  
[5:4]  
Length of  
outputted word  
DAR  
[1:0]  
16bit  
18bit  
20bit  
24bit  
0
1
2
3
16bit  
18bit  
20bit  
24bit  
0
1
2
3
Note: In KP2 standard mode, both of the input and output word lengths are only 16 bits.  
-5) The through-mode can be selected by using DAR register ($04) (only in KP2V extended mode).  
In the through-mode ;  
BCI input signal is passed to the BCO output, being inverted.  
SDSY input signal is passed to the L/R output, being delayed by 2.5 clocks of BCI.  
DI input signal is passed to the DO output, being delayed by 2.5 clocks of BCI.  
When the sampling frequency is in the range from 64 kHz to 96 kHz, the input signal can be passed through this  
LSI without deteriorating, for example, the 24 bit data accuracy at the sampling frequency of 96 kHz.  
The through-mode is enabled when the value of DAR[bit3:2] is “01”, “10” or 11”.  
9
YSS915  
5. Microcomputer interface  
/CS, /SCK, CDI, CDO, DEPI  
These are 8 bit serial interface for writing data into or reading data from internal registers of this device.  
Do not write or read data into or from this device in 200 msec from the initial clear moment (rise moment of /IC).  
-1) Writing data  
Set the address of an internal register into the first byte, and data into the second byte.  
Use the following format.  
/CS  
/SCK  
2
7
6
3
2
1
CDI  
0
1
3
5
5
3
4
4
4
6
2
5
6
7
0
3
2
7
0
5
6
7
4
0
1
1
Address of register  
Address of register  
Data  
Data  
-2) Reading data (only in KP2V extended mode)  
For reading data, only MLR register ($10) is provided.  
Use the following format.  
/CS  
/SCK  
CDI  
4 6  
5
0
0 2  
1
1
7
3
7
2
3
5
6
4
High-impedance  
High-impedance  
6
5
3 4  
7
0
1
2
3
4
5
6 7  
2
0
1
CDO  
Address of register  
$10  
Address of register  
$10  
Read data  
Read data  
-3) DEPI  
When DEPI is "H", de-emphasis is enabled regardless of the state of internal register.  
When DEPI is "L", setting of OPR register ($00) is valid.  
6. Others  
-1) P0  
P0 ,ZERO  
P0 pin outputs the value of the register PHC[0]($08). This value is outputted when OPR($00) has been set after the  
initial clear. This pin is in High-impedance state until OPR($00) is set.  
This function is valid when MDR[0]($1C) is ‘1’. When MDR[0]($1C) is ‘0’, this pin always outputs ‘L’ like YSS903  
does.  
-2) ZERO  
When both of the digital audio outputs, L and R, have been “zero(0)” for the period equivalent to 511 samplings, the  
zero level detection function activates to make ZERO pin output ‘L’ . In other period, this pin is in ‘H’ state.  
This value is outputted when OPR($00) has been set after the initial clear. This pin is in HZ state until OPR($00) is  
set.  
This function is valid when MDR[1]($1C) is ‘1’. When MDR[1]($1C) is ‘0’, this pin always outputs ‘L’ like YSS903  
does.  
10  
OPERATIONS  
Process flow chart  
1. Karaoke program  
Flow of signal in processing Karaoke audio signal in this LSI is as described by the following diagram.  
The Karaoke program can be used in both KP2 standard mode or KP2V extended mode.  
In KP2 standard mode, the same functions as those of KP2 can be used, and most of the registers of KP2V and KP2 are compatible with each other,  
except that the registers related to analog audio input and analog microphone echo output cannot be used because KP2V does not have these functions.  
In KP2V extended mode, every function of the Karaoke program can be used.  
Mono-echo, stereophonic echo, 3 D echo and super 3D echo provided in the evaluation board can be obtained by combining the following microphone  
echo/Reverb echo, microphone key control and/or microphone wide surround functions appropriately.  
C09  
C02  
C1E  
Digital  
input Lch  
Tone Control  
(B M T)  
Digital  
Output Lch  
C0A  
VCR  
TCR,RVR  
C01  
De-  
emphasis  
Wide surround  
Voice  
Cancel  
Key  
Control  
Soft  
Mute  
Input Fader  
TCR,RVR  
C04  
C06  
KSR  
C1F  
C0E  
Tone Control  
(B M T)  
Digital  
Output Rch  
OPR  
Digital  
Input Rch  
VCR  
KSR  
OPR  
C0F  
Analog  
Output Lch  
VCR  
TMR  
(fader’s time constant)  
C15  
Analog  
Input MIC  
Analog  
Output Rch  
C00  
C1C  
A/D  
Input Fader  
C18  
Microphone  
Echo  
KER  
Key Control  
C19  
C1A  
C1B  
RVR  
Interpolation  
Filter (1/3fs)  
Wide  
Surround  
Decimation  
Filter (1/3fs)  
LPF  
MIC Echo/Reverb Echo  
C05 C08  
C0D  
VCR  
C1D  
C03  
C0B  
C0C  
C16  
C17  
MIC Level  
detection  
Fixed value  
Controllable functions in KP2 standard mode and KP2Vextended mode:  
C14  
Volume  
Controllable functions only in KP2V extended mode:  
11  
2. Movie and music program  
Flow of signal in processing movie and music audio signal in this LSI is as follows  
The movie or music program can be used in KP2V extended mode  
The fifteen types of the surround mode provided in the evaluation board are obtained by combining the following  
tone control, initial reflection sound and/or wide surround functions appropriately.  
C16  
C02  
C01  
C1E  
Tone  
Control  
C09  
Digital  
Input Lch  
Digital  
Output Lch  
(B M T)  
C1A  
C1B  
C0A  
C18  
C1C  
TCR,RVR  
Soft  
mute  
De-  
emphasis  
Wide Surround  
C1D  
C19  
TCR,RVR  
C04  
C06  
KSR  
C0E  
C0F  
C1F  
Tone  
Control  
Digital  
Input Rch  
Digital  
Output Rch  
OPR  
OPR  
(B M T)  
C17  
Analog  
Output Lch  
C15  
Analog  
Input MIC  
C11  
C10  
C13  
C12  
Analog  
Output Rch  
Surround  
Surround  
Decimation  
Filter (1/3fs)  
Interpolation  
Filter (1/3fs)  
LPF  
LPF  
(Initial refrected  
sound)  
(Initial reflected  
sound)  
KSR  
KSR  
Fixed value  
Controllable functions only in KP2V extended mode:  
Volume  
12  
OPERATIONS OF FUNCTIONS  
1. Karaoke program  
Functions for processing the Karaoke audio signals are described here.  
Control register  
Coefficient register  
Controllable  
mode  
Function  
De-emphasis  
Input Fader  
Description  
De-emphasizes audio input signal that has been emphasized.  
Specifies a sampling frequency and on/off of de-emphasis.  
OPR[1]  
N, E  
OPR[7:6]  
VCR[1:0]  
TMR[7:0]  
VCR[4]  
TMR[7:0]  
OPR[7:6]  
KSR[4:0]  
Controls fade-in/out for audio input signal.  
N, E  
Specifies fade-in/out for each channel after setting fade time (See Note.)  
Reduces mid-range signal of inputted audio signal that is located in the center of the sound field such vocal  
signal generated by stereophonic CD.  
Specifies voice cancel on/off after setting sampling frequency and fade time. (See Note.)  
Changes key of inputted audio signal, and controls key shift for audio input signal. The amount of key shift  
must be specified.  
Controls tone of inputted audio signal in three frequency bands.  
Specifies the levels for bass (fc = 200 Hz), treble (fc = 5 kHz), and mid-tone (fc = 1 kHz) after selecting a  
sampling frequency.  
Voice Cancel  
Key Control  
Tone Control  
Surround  
N, E  
N, E  
TCR[7:0]  
RVR[3:0]  
OPR[7:6]  
E
Applies wide surround to audio input signal. One of four types of surround modes is selected and Output levels KSR[6:5]  
N, E  
E
for R and L channels are set individually based on the selected surround mode.  
Detects and reads the level of signal input from microphone.  
Specifies the time constant for level detection.  
Applies echo to signal from microphone processed by setting delay and feedback.  
Specifies delay time, feedback level and output signal level for L/R.  
Expands echo by providing stereophonic output.  
C01, C04  
MLR[7:0]  
C14  
C05, C08, C0B, C0C  
C16, C17, C00, C03  
C1A, C1B  
RVR[4]  
KER[7:0]  
C18, C19  
Microphone  
level detection  
Microphone  
Echo  
N, E  
Stereo Echo  
Reverberation Echo  
Microphone  
key control  
E
E
E
Damps echo naturally by adding reverb function.  
Applies microphone echo by subjecting signal inputted from microphone to key shift.  
Specifies the amount of key shift and output signal level for L/R.  
Applies surround to microphone echo to obtain expansion that is specific to wide surround.  
Specifies output signal level for L/R.  
Microphone  
Wide surround  
Soft Mute  
C1C, C1D  
E
Noiseless mute, Specifies on/off.  
Controls volume.  
OPR[3]  
N, E  
N, E  
C02, C06, C09, C0A  
C0D, C0E, C0F, C15  
C1E, C1F  
Volume  
Some of the functions can be set in either of KP2 standard mode or KP2V extended mode, some only in KP2V  
extended mode.  
Note: The fade time is applicable to the input fader and voice cancel functions.  
13  
2. Movie and music program  
Functions for processing the movie and music signals are described here.  
The movie and music program can be used in KP2V extended mode.  
Control register  
Coefficient register  
Function  
Description  
De-emphasizes audio input signal that has been emphasized.  
Specifies a sampling frequency and on/off of de-emphasis.  
Controls tone of inputted audio signal in three frequency bands.  
Specifies the levels for bass (fc = 200 Hz), treble (fc = 5 kHz), and mid-tone (fc = 1 KHz) after selecting a sampling  
frequency.  
OPR[1]  
De-emphasis  
Tone Control  
OPR[7:6]  
TCR[7:0]  
RVR[3:0]  
OPR[7:6]  
KSR[6:5]  
Surround 1  
Applies surround that uses initial reflected sound synthesizing system to audio input signal.  
One of four types of surround modes is selected and Output levels for R and L channels are set individually based on the  
selected surround mode.  
(Initial reflected  
C10, C11, C12  
C13, C18, C19  
KSR[7]  
sound)  
Applies wide surround to audio input signal.  
Wide Surround  
Soft Mute  
One of two types of surround modes is selected and Output levels for R and L channels are set individually based on the  
selected surround mode.  
C1A, C1B, C1C  
C1D, C01, C04  
Noiseless mute, Specifies on/off.  
Controls volume.  
OPR[3]  
C02, C06, C09, C0A,  
C0E, C0F, C15, C16  
C17, C1E, C1F  
Volume  
This LSI presents the features of sound field by using a combnation of tone control, surround (initial reflected sound) and wide surround.  
The tone control determines frequency characteristics of the sound field.  
Initial reflected sound synthesis determines extent and depth of sound field to characterize a surround environment (concert hall and stadium).  
Wide surround determines size and extent of reverberation.  
14  
YSS915  
REGISTERS  
This LSI is controlled by setting data into the registers.  
The address, name and function of each register is outlined as follows.  
Address  
$00  
Name  
OPR  
KSR  
VCR  
TMR  
DAR  
TCR  
RVR  
KER  
PHC  
MLR  
MDR  
C00  
Function  
Controls internal operations.  
$01  
Controls key and surround.  
$02  
$03  
Controls input fader and voice cancel.  
Controls fade time for input fader and voice cancel.  
Controls digital audio I/O format.  
Controls tone (bass, treble).  
$04  
$05  
$06  
$07  
Controls tone (mid-range) and Reverb-echo.  
Controls key for microphone.  
$08  
$10  
$1C  
$20  
Port output register.  
Reads microphone level.  
Switching KP2 standard/KP2V extension mode, and others.  
Coefficient register (controls volume and delay.)  
$3F  
C1F  
$FA  
$FF  
Test register (Don’t write any data)  
* Writing is prohibited except for permitted address.  
Controllable and uncontrollable registers (bits) vary according to the following modes.  
The mode is specified as follows according to the status of bit 7 of MDR register($1C).  
Code  
N
E
Mode  
MDR($1C)[bit 6]  
KP2 standard mode  
KP2V extended mode  
0
1
15  
YSS915  
1. Functions  
Functions, default value and controllable mode are as shown below.  
The default value is the value that is set at initial clear or the one obtained in other than the controllable mode.  
-1) OPR($00): Control of internal operation  
Controllable  
mode  
bit  
0
Function  
Default  
1
Unused (Set "1" here.)  
-
Controlling De-emphasis  
1 = De-emphasis is disabled.  
0 = De-emphasis is enabled.  
1
1
N, E  
Note: Whenever DEPI is "H", de-emphasis is enable regardless of the status of this  
bit.  
2
3
Unused (Set "0" here.)  
1
1
-
Controlling soft mute  
1 = Soft mute is off (Fade-in at (1024/fs (sec))  
0 = Soft mute is on (Fade-out at (1024/fs (sec))  
Note: fs = sampling frequency (Hz)  
N, E  
Controlling internal accumulator output clear on/off  
1 = Internal accumulator output clear is on.  
0 = Internal accumulator output clear is off (Normal operation).  
4
5
1
1
N, E  
N, E  
Controlling sync mode  
1 = Internal synchronization mode  
(Digital audio input signals (BCI, SDSY and DI) are not used.)  
0 = External synchronization mode  
(Digital audio input signals (BCI, SDSY and DI) are used.)  
Selecting sampling frequency  
b7 b6  
6
7
1
0
N, E  
E
0
0
1
1
0 = 37.8kHz  
1 = 44.1kHz  
0 = 32.0kHz  
1 = 48.0kHz  
Note: The frequencies 32.0 kHz and 48.0 kHz are valid in KP2V extension mode.  
16  
YSS915  
-2) KSR($01) : Control of key and surround  
Controllable  
mode  
bit  
Function  
Default  
0
1
2
3
4
0
0
0
0
0
Amount of key shift for audio signal key control  
(This function is valid on Karaoke program. For the correspondence between  
the setting value for key control and the amount of key shift, refer to the table  
N, E  
below.)  
Selecting a type of surround (wide surround) for Karaoke program, or a type of  
surround (initial reflected sound) for movie or music program.  
(For the Correspondence between the setting value and the surround type,  
refer to the table below.)  
5
6
0
0
N, E  
E
Selecting a surround mode for wide surround (valid in movie and music mode)  
0 = MODE0  
7
0
1 = MODE1  
Correspondence between the setting value for key control  
and the amount of key shift for audio signal  
KSR  
bit  
4-0  
0F  
0E  
0D  
0C  
0B  
0A  
09  
08  
07  
06  
05  
04  
03  
02  
01  
00  
bit  
4-0  
1F  
1E  
1D  
1C  
1B  
1A  
19  
18  
17  
16  
15  
14  
13  
12  
11  
10  
Amount of key shift  
9-1/2 keys up  
1 octave up  
3-1/2 keys up  
3 keys up  
Amount of key shift  
1/4 key down  
2/4 key down  
3/4 key down  
1 key down  
2-3/4 keys up  
2-2/4 keys up  
2-1/4 keys up  
2 keys up  
1-3/4 keys up  
1-2/4 keys up  
1-1/4 keys up  
1 key up  
3/4 key up  
2/4 key up  
1/4 key up  
No key shift  
1-1/4 keys down  
1-2/4 keys down  
1-3/4 keys down  
2 keys down  
2-1/4 keys down  
2-2/4 keys down  
2-3/4 keys down  
3 keys down  
3-1/2 keys down  
1 octave down  
7 keys down  
9-1/2 keys down  
Correspondence between the surround type and surround selection bit  
KSR  
bit  
6 5  
Surround for movie and music program  
Wide Surround for Karaoke program  
(Initial reflected sound)  
0 0 PSEUDO-STEREOPHONIC SOUND  
0 1 LIVE  
1 0 MOVIE  
(See Note.)  
HALL1 (See Note.)  
STADIUM  
HALL0  
1 1 KARAOKE  
ROCK CONCERT  
Note: HALL0 Concert hall that provides standard reverberation  
HALL1 Concert hall that provides long reverberation  
17  
YSS915  
-3) VCR($02) : Control of input fader and voice cancel (valid for Karaoke program)  
Controllable  
mode  
bit  
Function  
Default  
Controlling fade-in/out at digital audio input L channel  
1 = Starting fade in  
0 = Starting fade out  
0
0
N, E  
N, E  
Note: Before this bit is set, set fade time into TMR ($03)  
Controlling fade-in/out at digital audio input R channel  
1 = Starting fade in  
1
0
0 = Starting fade out  
Note: Before this bit is set, set fade time into TMR ($03)  
Unused (Set "0" here.)  
2
3
0
0
-
-
Unused (Set "0" here.)  
Controlling voice cancel on/off  
1 = On (switching from through-path to voice-canceled path)  
0 = Off (switching from voice-canceled path to through-path)  
4
5
0
0
N, E  
E
Note: Before this bit is set, set cross fade time into TMR ($03).  
Fade-in/fade-out for microphone echo input  
0 = Starting fade in  
1 = Starting fade out  
Note: Fade time = 1024/fs (sec)  
Unused (Set "0" here.)  
6
7
0
0
-
-
Unused (Set "0" here.)  
-4) TMR($03) : Control of fade time for input fader and voice cancel (valid for Karaoke program)  
Controllable  
bit  
Function  
Default  
mode  
0
1
2
3
4
5
6
7
0
0
0
0
0
0
0
0
Fade time for input fader and voice cancel  
Fade time = 1024/fs (sec) when TMR=00h  
1048576/fs/TMR (sec) when TMR=other than 00h  
Note: fs = sampling frequency  
N, E  
18  
YSS915  
-5) DAR($04) : Control of digital audio I/O format  
Controllable  
mode  
bit  
0
Function  
Default  
0
Selecting digital audio output data word length  
b1 b0  
0
0
1
1
0
1
0
1
= 16 bits  
= 18 bits  
= 20 bits  
= 24 bits  
E
E
E
E
1
2
0
0
This function is valid when bit 5 of OPR($00) = 0. When this bit = 1, the digital  
audio output synchronizes with internal clock (64 fs).  
b3 b2  
0
0
1
1
0
1
0
1
= Synchronizing with internal clock (64 fs)  
= Synchronizing with BCI (64 fs)  
= Synchronizing with BCI (48 fs)  
= Synchronizing with BCI (32 fs)  
3
0
Selecting digital audio input data word length  
b5 b4  
0
0
1
1
Selecting an output to digital audio output pin (BCO, L/R and DO)  
b7 b6  
0
0
1
4
5
0
0
0
1
0
1
= 16bit  
= 18bit  
= 20bit  
= 24bit  
0
0
6
7
0
1
0
= Normal (Internally processed data are outputted.)  
= BCO, L/R and DO are fixed to "L".  
= BCI, SDDY and DI are through-outputted.  
(For the details, refer to 4-5) in Page 9.)  
1
1
= Inhibited  
19  
YSS915  
-6) TCR($05) : Control of tone (bass, treble)  
Controllable  
mode  
bit  
Function  
Default  
0
1
2
3
4
5
6
7
0
0
0
0
0
0
0
0
Controlling level of bass (fc = 200 Hz) (fc = cutoff frequency)  
(For the correspondence between the setting value and the level, refer to the  
table below.)  
E
E
Controlling level of treble (fc = 5 kHz) (fc = cutoff frequency)  
(For the correspondence between the setting value and the level, refer to the  
table below.)  
-7) RVR($06) : Control of tone (mid-range) and Reverb echo  
Controllable  
mode  
bit  
Function  
Default  
0
1
2
3
0
0
0
0
Controlling level of mid-tone (fc = 1 kHz) (fc = center frequency)  
(For the correspondence between the setting value and the level, refer to the  
table below.)  
E
Controlling reverb on/off (valid for Karaoke program)  
0
1
= Reverb off  
= Reverb on  
4
5
0
0
E
E
Selection of low pass filter for microphone echo  
0
1
= Cut off frequency equivalent to that of YSS903 (Standard)  
= Cut off frequency higher than that of YSS903 (Wide)  
6
7
Unused (Set "0" here.)  
Unused (Set "0" here.)  
0
0
-
-
Correspondence between the setting value and the level  
TCR  
RVR  
Level of  
bass  
Level of  
treble  
Level of  
mid-tone  
bit  
3 - 0  
bit  
7 - 4  
bit  
3 - 0  
Inhibited  
Inhibited  
+10dB  
+8dB  
+6dB  
+4dB  
+2dB  
0dB  
-2dB  
-4dB  
-6dB  
-8dB  
-10dB  
Inhibited  
Inhibited  
Inhibited  
Inhibited  
Inhibited  
+10dB  
+8dB  
+6dB  
+4dB  
+2dB  
0dB  
-2dB  
-4dB  
-6dB  
-8dB  
-10dB  
Inhibited  
Inhibited  
Inhibited  
Inhibited  
Inhibited  
+10dB  
+8dB  
+6dB  
+4dB  
+2dB  
0dB  
-2dB  
-4dB  
-6dB  
-8dB  
-10dB  
Inhibited  
Inhibited  
Inhibited  
7
6
5
4
3
2
1
0
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
F
E
D
C
B
A
9
8
20  
YSS915  
-8) KER($07) : Control of Key for microphone  
Controllable  
mode  
bit  
Function  
Default  
0
1
2
3
4
5
6
7
0
0
0
0
0
0
0
0
Amount of key shift for controlling microphone key at L channel  
(This function is valid on Karaoke program. For the correspondence between  
the setting value and the amount of key shift, refer to the table below.)  
E
E
Amount of key shift for controlling microphone key at R channel  
(This function is valid on Karaoke program. For the correspondence between  
the setting value and the amount of key shift, refer to the table below.)  
Correspondence between the setting value and the amount of key shift  
KER  
bit  
3 - 0  
Amount of key shift at  
L channel  
bit  
7 - 4  
Amount of key shift at  
R channel  
Inhibited  
Inhibited  
1 octave up  
3-1/2 keys up  
2 keys up  
20 cents up  
10 cents up  
No key shift  
10 cents down  
20 cents down  
2 keys down  
3-1/2 keys down  
1 octave down  
Inhibited  
Inhibited  
Inhibited  
1 octave up  
3-1/2 keys up  
2 keys up  
20 cents up  
10 cents up  
No key shift  
10 cents down  
20 cents down  
2 keys down  
3-1/2 keys down  
1 octave down  
Inhibited  
7
6
5
4
3
2
1
0
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
F
E
D
C
B
A
9
8
Inhibited  
Inhibited  
Inhibited  
Inhibited  
-9) PHC($08) : Output port register  
Controllable  
mode  
bit  
Function  
Default  
0
This value is outputted at PO pin.  
0
This function is enabled when MDR[0]($1C) = ‘1’. When it is ‘0’, PO pin is  
always at ‘L’ state.  
E
1
2
3
4
5
6
7
Unused (Set "0" here.)  
0
0
0
0
0
0
0
-
-
-
-
-
-
-
Unused (Set "0" here.)  
Unused (Set "0" here.)  
Unused (Set "0" here.)  
Unused (Set "0" here.)  
Unused (Set "0" here.)  
Unused (Set "0" here.)  
21  
YSS915  
-10) MLR($10) : Microphone level read register (valid for Karaoke program)  
Controllable  
mode  
bit  
Function  
Default  
0
1
2
3
4
5
6
7
0
0
0
0
0
0
0
0
Detected microphone level  
E
( unsigned binary of 8bits )  
-11) MDR($1C) : Switching KP2 standard mode/KP2V extended mode, and others  
Controllable  
mode  
bit  
0
Function  
Default  
0
Specifies whether the value of PHC[0]($08) is outputted at PO pin.  
0
1
= Not outputted (The same as YSS903)  
E
E
E
E
= Outputted  
Specifies whether the result of zero level detection is outputted at ZERO pin.  
1
2
3
0
1
= Not outputted (The same as YSS903)  
0
0
0
= Outputted  
Selects band width for microphone echo  
0
1
= Sampling frequency is 8 kHz. (The same as YSS903)  
= Sampling frequency is 12 kHz.  
Connection with MSB justified data output A/D converter  
0
1
= Direct connection not allowed (The same as YSS903)  
= Direct connection allowed  
Selecting karaoke/movie & music program  
0
1
= Karaoke program  
= Movie music program  
(When switching the program, be sure to mute, change the setting of  
coefficient register and this bit, and then release the mute when 250 ms  
has passed.)  
4
0
E
5
6
7
Unused  
0
0
0
-
N, E  
-
Switching KP2 standard mode/KP2V extended mode  
0
1
= KP2 standard mode  
= KP2V extended mode  
Unused (Set "0" here.)  
22  
YSS915  
-12) C**($20 to $3F) : Coefficient registers (Controlling volume and delay)  
bit 7  
bit 6  
bit 5  
bit 4  
bit 3  
bit 2  
bit 1  
bit 0  
C7  
C6  
C5  
C4  
C3  
C2  
C1  
C0  
C7-C0:Sets volume coefficient or delay coefficient  
For the addresses of the registers their functions for Karaoke and movie & music programs, refer to the following table  
and flow chart described in "OPERATIONS" section.  
For the relation between the setting value of coefficient, and volume level and delay time, refer to the formula shown  
later.  
When the coefficient registers controllable only in KP2V extended mode is used in the KP2 standard mode, the  
following preset values are used as their coefficient of address, and their setting values are not used.  
The values of the registers are indefinite immediately after turning on the power, be sure to set the register values in the  
controllable mode before releasing the mute.  
Name, function, preset value and controllable mode of the addresses of the coefficient register  
for Karaoke program  
Register  
address  
Preset Controllable  
Name  
Function  
value  
mode  
$20  
$21  
$22  
$23  
$24  
$25  
$26  
$27  
$28  
$29  
$2A  
$2B  
$2C  
$2D  
$2E  
$2F  
$30  
$31  
$32  
$33  
$34  
$35  
$36  
$37  
$38  
$39  
$3A  
$3B  
$3C  
$3D  
$3E  
$3F  
C00 Echo L channel output mixing level  
C01 Surround L channel output mixing level  
C02 Audio L channel output mixing level  
C03 Echo R channel output mixing level  
C04 Surround R channel output mixing level  
C05 Microphone echo L channel delay  
C06 Audio R channel output mixing level  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
N, E  
N, E  
N, E  
N, E  
N, E  
N, E  
N, E  
-
-
Unused  
C08 Microphone echo R channel delay  
N, E  
N, E  
N, E  
N, E  
N, E  
N, E  
N, E  
N, E  
-
C09 Digital input L - L channel mixing level  
C0A Digital input L - R channel mixing level  
C0B Microphone echo L channel feedback level  
C0C Microphone echo R channel feedback level  
C0D Microphone echo input level  
C0E Digital input R - L channel mixing level  
C0F Digital input R - R channel mixing level  
-
-
-
-
Unused  
Unused  
Unused  
Unused  
-
-
-
-
-
-
C14 Time constant for microphone level detection  
C15 Microphone direct sound output mixing level  
C16 Microphone echo L channel mixing level  
C17 Microphone echo R channel mixing level  
C18 Microphone key control L channel mixing level  
C19 Microphone key control R channel mixing level  
C1A Stereo-phonic echo L channel mixing level  
C1B Stereo-phonic echo R channel mixing level  
C1C Microphone echo wide surround L channel mixing level  
C1D Microphone echo wide surround R channel mixing level  
C1E L channel total output level  
$00  
$1F  
$7F  
$7F  
$00  
$00  
$00  
$00  
$00  
$00  
$7F  
$7F  
E
E
E
E
E
E
E
E
E
E
E
C1F R channel total output level  
E
23  
YSS915  
Name, function, and controllable mode of the addresses of the coefficient register for  
movie and music program  
Register  
address  
Controllable  
Name  
-
Function  
mode  
$20  
$21  
$22  
$23  
$24  
$25  
$26  
$27  
$28  
$29  
$2A  
$2B  
$2C  
$2D  
$2E  
$2F  
$30  
$31  
$32  
$33  
$34  
$35  
$36  
$37  
$38  
$39  
$3A  
$3B  
$3C  
$3D  
$3E  
$3F  
Unused  
-
C01 Wide Surround L channel output mixing level  
C02 Audio & surround (initial reflected sound) L channel output mixing level  
E
E
-
E
-
E
-
-
E
E
-
-
-
E
E
E
E
E
E
-
E
E
E
E
E
E
E
E
E
E
E
-
Unused  
C04 Wide Surround R channel output mixing level  
Unused  
C06 Audio & surround (initial reflected sound) R channel output mixing level  
-
-
-
Unused  
Unused  
C09 Digital input L - L channel mixing level  
C0A Digital input L - R channel mixing level  
-
-
-
Unused  
Unused  
Unused  
C0E Digital input R - L channel mixing level  
C0F Digital input R - R channel mixing level  
C10 Surround (initial reflected sound) input 1 L channel mixing level  
C11 Surround (initial reflected sound) input 1 R channel mixing level  
C12 Surround (initial reflected sound) input 2 L channel mixing level  
C13 Surround (initial reflected sound) input 2 R channel mixing level  
-
Unused  
C15 Microphone direct sound output mixing level  
C16 Audio L channel output mixing level  
C17 Audio R channel output mixing level  
C18 Surround (initial reflected sound) L channel mixing level  
C19 Surround (initial reflected sound) R channel mixing level  
C1A Wide Surround input 1 L channel mixing level  
C1B Wide Surround input 1 R channel mixing level  
C1C Wide Surround input 2 L channel mixing level  
C1D Wide Surround input 2 R channel mixing level  
C1E L channel total output level  
C1F R channel total output level  
Correspondence between setting value and level of C15  
C15  
bit  
7-0  
bit  
7-0  
bit  
7-0  
Level  
Level  
Level  
00  
01  
02  
03  
04  
05  
06  
07  
08  
09  
0A  
0B  
0
dB  
0C  
0D  
0E  
0F  
10  
11  
12  
13  
14  
15  
16  
17  
-18.0dB  
-19.5dB  
-21.0dB  
-22.5dB  
-24.0dB  
-25.5dB  
-27.0dB  
-28.5dB  
-30.0dB  
-31.5dB  
-33.0dB  
-34.5dB  
18  
19  
1A  
1B  
1C  
1D  
1E  
1F  
20  
|
-36.0dB  
-37.5dB  
-39.0dB  
-40.5dB  
-42.0dB  
-43.5dB  
-45.0dB  
MUTE  
Inhibited  
|
-1.5dB  
-3.0dB  
-4.5dB  
-6.0dB  
-7.5dB  
-9.0dB  
-10.5dB  
-12.0dB  
-13.5dB  
-15.0dB  
-16.5dB  
FF  
Inhibited  
24  
YSS915  
Relation between setting value of co1efficient registers ($20 to $3F), and volume level and  
delay time  
Delay time (C05, C08)  
6
7
When ( Σ (C  
N
x 2N) 119,  
and MDR[2]($1C) = "0"  
and MDR[2]($1C) = "1"  
[ms]  
[ms]  
x 2N)  
(64 / fs ) x Σ (C  
N
N=0  
N=0  
6
(42.656 / fs ) x Σ (C  
N
x 2N)  
N=0  
7
x 2N) 120,  
and MDR[2]($1C) = "0"  
and MDR[2]($1C) = "1"  
7653/fs  
[ms]  
[ms]  
When ( Σ (C  
N
N=0  
5102/fs  
However, when the bit 4 of the Reverb echo ON(RVR($06) is "1",  
7
Σ (C  
N
x 2N) 102  
it is necessary to meet with  
N=0  
e ffe[]  
Other volume level  
11  
Σ 2N-12  
When C  
7
= "0" and C  
6
= C  
5
= C  
4
= C  
3
= C  
2
= C  
1
= C = "1"  
0
N=1  
Other cases  
( -1) x C  
7
+ 6Σ (C  
x 2N-7  
)
N
N=0  
Note1: fs shows sampling frequency [kHz].  
Note2: C7, C6, C5, C4, C3, C2, C1 and C0 show each bits (bit7-bit0) of a register which  
are set volume value.  
25  
YSS915  
ELECTRICAL CHARACTERISTICS  
1. Absolute maximum ratings  
Item  
Code  
Rating  
Unit  
Power source voltage  
Digital input voltage  
Analog input voltage  
Operating temperature  
Storage temperature  
AVDD,DVDD  
-0.3 to 7.0  
-0.5 to DVDD + 0.5  
-0.5 to AVDD + 0.5  
0 to 70  
V
V
V
°C  
°C  
VI  
VI  
Top  
Tstg  
-50 to 125  
2. Recommended operating conditions  
Item  
Code  
Minimum  
Typical  
Maximum  
Unit  
Digital power source voltage  
Analog power source voltage  
Operating temperature  
DVDD  
AVDD  
Top  
4.75  
4.50  
0
5.00  
5.00  
25  
5.25  
5.25  
70  
V
V
°C  
3. DC characteristics (Conditions: Ta = 0 to 70 °C, DVDD = 5.0 +/- 0.25 V)  
Item  
Code  
Condition  
Minimum  
Typical  
Maximum  
Unit  
Power source current  
Input voltage H level (1)  
Input voltage H level (2)  
Input voltage L level  
Input leakage current  
Output voltage H level  
Output voltage L level  
Notes:  
IDD  
VIH1  
VIH2  
VIL  
ILK  
VOH  
VOL  
VDD = 5.0V  
(See Note 1)  
(See Note 2)  
80  
mA  
V
V
V
μA  
V
2.0  
3.5  
0.8  
10  
-10  
VDD-1.0  
IOH = -0.4mA  
IOL = 1.6mA  
0.4  
V
(1) Applies to input pins other than XISEL, DO and PO.  
(2) Applies to input pins XISEL, DO and PO.  
4. Analog characteristics (Conditions : Ta = 25 °C, DVDD=AVDD = 5.0 V)  
Item  
Code  
Condition  
(See Note 1)  
(See Note 3)  
Minimum  
Typical  
Maximum Unit  
Analog input voltage  
Analog output voltage  
ADC Total harmonic distortion  
Dynamic range  
VIA  
VOA  
(See Note 2)  
V
V
2.8  
0.04  
80  
THD+N (See Note 5,6 ) 0 dB  
DR (See Note 4,5,6 ) -60 dB  
0.2  
%
75  
90  
dB  
Analog through  
Total harmonic distortion THD+N (See Note 6,7 ) 0 dB  
Dynamic range DR (See Note 4,6,7 ) -60 dB  
Notes: Input signal frequency is 1KHz.  
(1) Peak to peak value. Applies to MICIN pin  
0.005  
95  
0.02  
%
dB  
(2) Any voltage can be used if input resistor attached externally to MICIN is selected properly  
VIA=R/9.4K, When value of a resistor was shown with R,  
(3) Peak to peak value. Applies to AOL and AOR pins. The output voltage is in proportion to AVDD.  
(4) Uses IHF-A  
(5) The signal is outputted through MICIN inputs to digital outputs via Volume.  
(6) Input resistor attached externally to MICIN : 47 kΩ. 0 dB = 4.65 Vpp  
(7) The signal is outputted through MICIN inputs to AOL and AOR via volume.  
26  
YSS915  
5. AC characteristics (Conditions : Ta = 0 to 70 °C, DVDD = 5.0 +/- 0.25 V)  
Item  
Code  
Minimum  
Typical  
Maximum  
Unit  
XI  
Input frequency  
fc (See Note 1)  
fc (See Note 2)  
12.0  
8.0  
18.5 (See Note 3)  
12.5 (See Note 4)  
MHz  
MHz  
%
XI  
Duty factor  
Frequency  
On/off time  
Transition time  
Setup time  
Hold time  
Rc  
fBC  
tBO  
tBT  
tDS  
tDH  
tD  
50  
BCI  
BCI  
1.0  
4.7 (See Note 5)  
MHz  
ns  
ns  
ns  
ns  
ns  
s
s
s
s
s
100 (See Note 6)  
20  
DI, SDSY  
80 (See Note 7)  
80 (See Note 7)  
-20  
DO, L/R  
/CS  
/SCK  
/CS, /SCK Transition time  
CDI  
Access time  
Setup time  
On/off time  
20  
1/150fs(See Note 8)  
600  
tCS  
tSO  
tCT  
tSS  
tSH  
1/50fs (See Note 8)  
1/50fs (See Note 8)  
Setup time  
Hold time  
Access time  
1/100fs(See Note 8)  
1/100fs(See Note 8)  
CDO  
/IC  
tCD  
220  
2
100  
ns  
ms  
μs  
Hold time  
tIX (See Note 9)  
tIL(See Note 10)  
Notes:  
(1) XI = 384 fs (See Note 8.)  
(2) XI = 256 fs (See Note 8.)  
(3) 37 MHz in through-mode  
(4) 25 MHz in through-mode  
(5) 6.2 MHz in through-mode  
(6) 70 ns in through-mode  
(7) 50 ns in through-mode  
(8) fs : sampling frequency  
(9) Just after turn on the power  
(10) In operation  
27  
YSS915  
tBO  
tBT  
tBT  
2.0V  
0.8V  
tBO  
BCI  
tDS  
tDH  
2.0V  
0.8V  
DI,SDSY  
BCO  
0.4V  
tD  
VDD-1.0V  
0.4V  
DO,L/R  
tCT  
tCT  
2.0V  
0.8V  
tCS  
tCS  
/CS  
tCT  
tSO  
tCT  
tSO  
2.0V  
0.8V  
/SCK  
CDI  
tSS  
tSH  
2.0V  
0.8V  
tCD  
CDO  
4.75V  
DVDD  
/IC  
tIX  
tIL  
0.8V  
0.8V  
0.8V  
28  
YSS915  
A procedure to change Normal mode to Through-mode  
Normal mode means that it can apply the sound effect using internal DSP function and the sampling frequency is  
between 32kHz and 48kHz in this mode.  
Through-mode means that the digital input data fed to YSS915 is bypassed to digital output pin without processing  
by DSP and the sampling frequency is 64kHz to 96kHz.  
For example, when the sampling frequency is changed from 48kHz( called fs-single) to 96kHz( called fs-double),  
master clock frequency fed to XI pin of YSS915 may be changed according to the fs(sampling frequency).  
In this case please refer to the following procedure.  
A. Change Normal mode (fs-single) to Through-mode (fs-double)  
Mute Analog output of the product  
1.  
2.  
3.  
4.  
5.  
6.  
Set /IC=“0” of YSS915  
Change the master clock frequency (XI of YSS915) from “single “ to “double”  
Wait 2msec or more  
Set /IC=“1”  
Set the parameters from the microprocessor to YSS915 as followed  
opr [7:0] = 8’bxx00x0x1  
mdr [7:0] = 8’b01100000  
dar [7:0] = 8’b10xx01xx or 8’b10xx10xx or 8’b10xx11xx  
x means don’t care  
Disable to mute Analog output of the product  
7.  
Mute of Analog out  
/IC of YSS915  
XI of YSS915  
mute  
single  
double  
Min 2msec  
Setting from microprocessor  
to YSS915  
setting  
B. Change Through-mode (fs-double) to Normal mode (fs-single)  
Mute Analog output of the product  
Set /IC=“0” of YSS915  
1.  
2.  
3.  
4.  
5.  
6.  
Change the master clock frequency (XI of YSS915) from “double“ to “single”  
Wait 2msec or more  
Set /IC=“1”  
Set the parameters from the microprocessor to YSS915 as the same way after power on  
Mute of Analog out  
/IC of YSS915  
XI of YSS915  
mute  
double  
single  
Min 2msec  
Setting from microprocessor  
to YSS915  
setting  
29  
YSS915  
EXTERNAL DIMENSIONS  
30  
YSS915  
配单直通车
YSS915-MZ产品参数
型号:YSS915-MZ
是否Rohs认证: 符合
生命周期:Obsolete
IHS 制造商:YAMAHA CORP
零件包装代码:SOIC
包装说明:SOP,
针数:28
Reach Compliance Code:unknown
ECCN代码:EAR99
HTS代码:8542.39.00.01
风险等级:5.82
其他特性:ALSO IT REQUIRES 4.75V TO 5.25V DIGITAL SUPPLY
商用集成电路类型:TONE CONTROL CIRCUIT
JESD-30 代码:R-PDSO-G28
长度:18.1 mm
频带数量:3
信道数量:2
功能数量:1
端子数量:28
最高工作温度:70 °C
最低工作温度:
封装主体材料:PLASTIC/EPOXY
封装代码:SOP
封装形状:RECTANGULAR
封装形式:SMALL OUTLINE
认证状态:Not Qualified
座面最大高度:2.75 mm
最大供电电压 (Vsup):5.25 V
最小供电电压 (Vsup):4.5 V
表面贴装:YES
温度等级:COMMERCIAL
端子形式:GULL WING
端子节距:1.27 mm
端子位置:DUAL
宽度:8.4 mm
Base Number Matches:1
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