PCN/PCS Delta Modulation CODEC
11
MX609
Notes:
1. Dynamic characteristics specified at 5.0V only.
2. All logic inputs except Encoder and Decoder Data clocks
3. With passband gain of
1dB.
4. Group Delay Distortion for the full codec is relative to the delay with and 820Hz, -20dB signal at the
encoder input
5. Relative timings are shown in figure 4
6. Recommended values
7. Forced idle Encode/Decode not available on DW package.
6.1.4
TIMING
Serial Bus Timings (See Figure 8)
t
CH
Clock 1 pulse width
t
CL
t
IR
t
IF
t
SU
t
H
t
SU
+t
H
Clock 0 pulse width
Clock rise time
Clock fall time
Data set-up time
Data hold time
Data true time
Min.
1.0
1.0
0
100
100
450
600
1.5
750
100
100
Typ.
Max.
Units
s
s
ns
ns
ns
ns
s
ns
ns
ns
t
PCO
Clock to output delay time
t
DR
Data rise time
t
DF
Data fall time
Xtal input frequency = 1.024MHz
ENCODER TIMING
ENCODER
CLOCK
t
CH
t
CL
DATA CLOCKED
t
CH
t
IF
t
IR
ENCODER DATA
OUTPUT
t
PCO
DECODER TIMING
DECODER
CLOCK
DATA CLOCKED
DECODER DATA
INPUT
t
SU
t
H
DATA TRUE TIME
ENCODER
OUTPUT
MULTIPLEXING FUNCTION
HIGH Z
HIGH Z
t
DR
DATA ENABLE
t
DF
Figure 8: Serial Bus Timing
1998
MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 204800069.005
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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CMLMICRO [ CML MICROCIRCUITS ]
