¡ Semiconductor
MSM80C31F/80C51F
Serial Port Timing (I/O Expansion Mode) AC Characteristics 2
Parameter
Serial port clock cycle time
Output data setup 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
(Ta = –40°C to +85°C ; VC C =2.5 to 4.0 V ; VSS = 0 V)
Symbol
Min.
Max. Unit
tXLXL
12tCLCL
—
ns
tQVXH 10tCLCL – 133
—
ns
tXHQX
2tCLCL – 117
—
ns
tXHDX
0
—
ns
tXHDV
—
10tCLCL – 133 ns
MACHINE
0
CYCLE
ALE
SHIFT
CLOCK
OUTPUT
DATA
INPUT
DATA
1
2
3
4
5
6
7
8
tXLXL
tQVXH
tXHQX
0
1
2
3
4
5
6
7
tXHDV
VALID
VALID
tXHDX
VALID
VALID
VALID
VALID
VALID
VALID
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