CN8478/CN8474A/CN8472A/CN8471A
7.0 Electrical and Mechanical Specifications
Multichannel Synchronous Communications Controller (MUSYCC™)
7.2 Timing and Switching Specifications
Table 7-13. EBUS I/O Measure Conditions
Symbol
Parameter
Voltage Threshold High(1)
Value
0.6 Vdd
0.2 Vdd
0.4 Vdd
0.4 Vdd
1
Units
Vth
Vtl
V
V
Voltage Threshold Low(1)
Voltage Test Point
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 7-11. EBUS Output Timing Waveform
Vth
Vtl
PCLK
Vtest
Tval
Output
Delay
Vtest
8478_033
Figure 7-12. EBUS Input Timing Waveform
Vth
Vtl
PCLK
Vtest
Tds
Tdh
Vth
Vtl
Vtest
Vtest
Input
Vmax
8478_034
100660E
Conexant
7-13
CONEXANT [ CONEXANT SYSTEMS, INC ]
