7.0 Electrical and Mechanical Specifications
7.2 Timing and Switching Specifications
CN8478/CN8474A/CN8472A/CN8471A
Multichannel Synchronous Communications Controller (MUSYCC™)
7.2.5 Serial Interface Timing and Switching Characteristics
Serial interface timing and switching characteristics are provided in
through
and
through
Table 7-14. Serial Interface Clock (RCLK, TCLK) Parameters
Symbol
F
c
T
r
T
f
Clock Frequency
Clock Rise Time
Clock Fall Time
Parameter
Min
DC
—
—
Max
8.192 ±10%
2
2
Units
MHz
ns
ns
Figure 7-15. Serial Interface Clock (RCLK,TCLK) Waveform
1/F
c
RCLK, TCLK
T
r
8478_037
T
f
Table 7-15. Serial Interface I/O Timing Parameters
Symbol
T
val
T
ds
T
dh
Parameter
Clock to Signal Valid Delay
Data Setup Time
Data Hold Time
Min
2
10
10
Max
20
—
—
Units
ns
ns
ns
Table 7-16. Serial Interface Clock Hysteresis (RCLK, TCLK, with Schmitt Trigger)
Symbol
V
TH
V
TL
V
H
Parameter
High Threshold Voltage
Low Threshold Voltage
Hysteresis
Min
0.7* VDDi
0
0.3
Max
—
0.3* VDDi
—
Units
V
V
V
7-16
Conexant
100660E
CONEXANT [ CONEXANT SYSTEMS, INC ]
