7.0 Electrical and Mechanical Specifications
CN8478/CN8474A/CN8472A/CN8471A
7.2 Timing and Switching Specifications
Multichannel Synchronous Communications Controller (MUSYCC™)
7.2.5 Serial Interface Timing and Switching Characteristics
Serial interface timing and switching characteristics are provided in Tables 7-14
through 7-17 and Figures 7-15 through 7-18.
Table 7-14. Serial Interface Clock (RCLK, TCLK) Parameters
Symbol Parameter
Min
DC
—
Max
Units
MHz
ns
Fc
Tr
Tf
Clock Frequency
Clock Rise Time
Clock Fall Time
8.192 10%
2
2
—
ns
Figure 7-15. Serial Interface Clock (RCLK,TCLK) Waveform
1/Fc
RCLK, TCLK
T
T
f
r
8478_037
Table 7-15. Serial Interface I/O Timing Parameters
Symbol Parameter
Clock to Signal Valid Delay
Min
2
Max
20
Units
ns
Tval
Tds
Tdh
Data Setup Time
Data Hold Time
10
10
—
ns
—
ns
Table 7-16. Serial Interface Clock Hysteresis (RCLK, TCLK, with Schmitt Trigger)
Symbol
Parameter
High Threshold Voltage
Min
0.7* VDDi
0
Max
—
Units
VTH
VTL
VH
V
V
V
Low Threshold Voltage
Hysteresis
0.3* VDDi
—
0.3
7-16
Conexant
100660E
CONEXANT [ CONEXANT SYSTEMS, INC ]
