CVSD Codec
CMX639
1.7.1.3 Operating Characteristics (continued)
Timing Diagram
ENCODER TIMING
ENCODER
CLOCK
t
t
CH
CH
t
CL
t
t
DATA CLOCKED
IF
IR
ENCODER DATA
OUTPUT
DECODER TIMING
t
PCO
DECODER
CLOCK
DATA CLOCKED
DECODER DATA
INPUT
t
H
t
SU
DATA TRUE TIME
MULTIPLEXING FUNCTION
ENCODER
OUTPUT
HIGH
Z
HIGH Z
t
t
DF
DR
DATA ENABLE
Figure 4 Serial Bus Timing
For the following conditions unless otherwise specified:
Xtal Frequency = 1.024 MHz, VDD = 3.0V to 5.0V, Tamb = - 40°C to +85°C.
Serial Bus Timing (ref. Figure 4)
Notes
Min.
Typ.
Max.
Units
tCH
tCL
Clock 1 pulse width
Clock 0 pulse width
Clock rise time
1.0
1.0
0
ms
ms
ns
ns
ns
ns
ms
ns
ns
ns
tIR
100
100
tIF
Clock fall time
tSU
tH
Data set-up time
Data hold time
450
600
tSU +tH
tPCO
tDR
tDF
Data true time
1.5
750
100
100
Clock to output delay time
Data rise time
Data fall time
ã 2000 Consumer Microcircuits Limited
12
CMX639/2
CMLMICRO [ CML MICROCIRCUITS ]
