Datasheet

DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
93 of 101
10.3 Serial Port
Table 10-7. Serial Port Timing Characteristics
(See Figure 10-9, Figure 10-10, and Figure 10-11.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCLK High Time t1 25 ns
SCLK Low Time t2 25 ns
Active CSB to SCLK Setup Time t3 50 ns
Last SCLK to CSB Inactive Time t4 50 ns
CSB Idle Time t5 50 ns
SDI to SCLK Setup Time t6 5 ns
SCLK to SDI Hold Time t7 5 ns
SCLK Falling Edge to SDO High
Impedance (CLKE = 0);
CSB Rising to SDO High
Impedance (CLKE = 1)
t8 100 ns
Figure 10-9. Serial Bus Timing Write Operation
SCLK
SDI
CSB
t3
t6
t4
t5
LSB
MSB
t2t1
t7
Figure 10-10. Serial Bus Timing Read Operation with CLKE = 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
SCLK
CS
B
SD
O
t4
t8
Figure 10-11. Serial Bus Timing Read Operation with CLKE = 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
SCLK
CSB
SDO
t4
t8