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 ꢃ1dB.
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)
Min.
1.0
1.0
0
Typ.
Max.
Units
ꢄs
t
t
t
t
t
t
t
t
t
t
Clock 1 pulse width
Clock 0 pulse width
Clock rise time
CH
CL
IR
ꢄs
100
100
ns
Clock fall time
ns
IF
Data set-up time
Data hold time
450
ns
SU
H
600
ns
+t
Data true time
1.5
750
100
100
ꢄs
SU
H
Clock to output delay time
Data rise time
ns
PCO
DR
ns
Data fall time
ns
DF
Xtal input frequency = 1.024MHz
ENCODER TIMING
ENCODER
CLOCK
tCH
tCH
tCL
tIR
tIF
DATA CLOCKED
ENCODER DATA
OUTPUT
tPCO
DECODER TIMING
DECODER
CLOCK
DATA CLOCKED
DECODER DATA
INPUT
tSU
tH
DATA TRUE TIME
MULTIPLEXING FUNCTION
tDF
ENCODER
OUTPUT
HIGH
Z
HIGH
Z
tDR
DATA ENABLE
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
All Trademarks and service marks are held by their respective companies.
CMLMICRO [ CML MICROCIRCUITS ]
