AC Parameters
Serial Port Timing - Shift
Register Mode
Table 74. Symbol Description (F = 40 MHz)
Symbol
TXLXL
Parameter
Serial port clock cycle time
TQVHX
TXHQX
TXHDX
TXHDV
Output data set-up to clock rising edge
Output data hold after clock rising edge
Input data hold after clock rising edge
Clock rising edge to input data valid
Table 75. AC Parameters for a Fix Clock (F = 40 MHz)
Symbol
TXLXL
Min
300
200
30
Max
Units
ns
TQVHX
TXHQX
TXHDX
TXHDV
ns
ns
0
ns
117
ns
Table 76. AC Parameters for a Variable Clock
Standard
Clock
x parameter
for -M range
Symbol
TXLXL
Type
Min
Min
Min
Min
Max
X2 Clock
6 T
Units
12 T
ns
ns
ns
ns
ns
TQVHX
TXHQX
TXHDX
TXHDV
10 T - x
2 T - x
x
5 T - x
T - x
50
20
0
x
10 T - x
5 T- x
133
100
AT89C5115
4128F–8051–05/06
ATMEL [ ATMEL ]
