CN8478/CN8474A/CN8472A/CN8471A
7.0 Electrical and Mechanical Specifications
Multichannel Synchronous Communications Controller (MUSYCC™)
7.2 Timing and Switching Specifications
Figure 7-16. Serial Interface Clock (RCLK,TCLK) Waveform
V
th
V
h
V
tl
RCLK, TCLK
Table 7-17. Serial Interface I/O Measure Conditions for 3.3 V Signaling
Symbol
Parameter
Voltage Threshold High(1)
Value
0.6 Vdd
0.2 Vdd
0.4 Vdd
0.4 Vdd
1
Units
Vth
V
V
Voltage Threshold Low(1)
Voltage Test Point
Vtl
Vtest
Vmax
—
V
Maximum Peak-to-Peak(2)
Input Signal Edge Rate
V
V/ns
NOTE(S):
(1)
The input test for the 3.3 V environment is done with 0.1 Vdd of overdrive (over Vih and Vil). Timing parameters must be met
with no more overdrive than this. Production testing can use different voltage values, but must correlate results back to these
parameters.
Vmax specifies the maximum peak-to-peak voltage waveform allowed for measuring input timing. Production testing can use
different voltage values, but must correlate results back to these parameters.
(2)
Figure 7-17. Serial Interface Data Input Waveform
Vth
Vtl
RCLK, TCLK
Vtest
Vtest
Tval
T
ds
Tdh
Vth
Vtl
TSYNC, RSYNC, ROOF, RDAT
(Rising Edge)
Vtest
Vtest
Vmax
Tval
Tds
Tdh
Vth
TSYNC, RSYNC, ROOF, RDAT
Vtest
Vtest
Vmax
(Falling Edge)
Vtl
100660E
Conexant
7-17
CONEXANT [ CONEXANT SYSTEMS, INC ]
