SM1350AAQM
PIN DESCRIPTION
No.
1
Pin Name
I/O
State*1
Description
VDD
S0
-
-
Supply pin
2
3
S1
Binary select mode : Phrase select pins.
I
SU
Serial select mode : S0 and S1 control melody output.
4
S2
5
S3
Melody select mode control. Binary mode when LOW, and serial
mode when HIGH.
6
7
8
MODE
LH
I
I
I
SU
SU
U
Melody output mode control. One-shot when LOW, and level hold
when HIGH.
One-shot melody mode : Melody output stop control.
Level hold melody mode : invalid input.
Melody start control
STOP
9
STN
BUSYN
CT
I
O
O
I
U
C
C
U
-
10
11
12
13
14
15
16
Busy output signal. LOW when a melody is output.
External control pulse output
ICN
Initialization clear input
VSS
VOL
SPN
SP
-
Ground pin
I
-
Volume adjusts control. Volume adjusted using an external resistor.
VOL current output
O
O
P
P
10-bit D/A converter output
It is not necessary to use it usually. It should connect VDD or OPEN.
When this terminal is made LOW, BUSYN compulsorily becomes
LOW. A pop sound might be emitted.
Pulse signal when melody output ends
17
EBUSYIN
I
U
18
19
20
21
22
23
24
ENDN
T1N
T2N
T3N
TO
O
I
C
U
U
U
C
-
Test signal inputs
I
This terminal cannot be used. It should connect VDD or OPEN.
I
O
O
I
Test signal output. 62.5kHz output when not in test mode.
XTN
XT
Oscillator output
Oscillator input
-
*1. U : pull-up resistor connection
SU : pull-up resistor connection only when melody output starts
(Function for current consumption decrease when driving with battery. Only when the terminal is read, the pull-up
resistor is connected.)
P : p-channel open drain
C : complementary output
SEIKO NPC CORPORATION - 3
NPC [ NIPPON PRECISION CIRCUITS INC ]
