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AUTOMOTIVE 80C51FA/83C51FA
SERIAL PORT TIMING-SHIFT REGISTER MODE
Test Conditions:
T
A
eb
40
Cto
a
125
C; V
CC
e
5V
g
10%; V
SS
e
0V; Load Capacitance
e
80 pF
Symbol Parameter
12 MHz Oscillator Variable Oscillator
Units
Min Max Min Max
T
XLXL
Serial Port Clock Cycle Time 1 12T
CLCL
ms
T
QVXH
Output Data Setup to Clock 700 10T
CLCL
b
133 ns
Rising Edge
T
XHQX
Output Data Hold after 50 2T
CLCL
b
117 ns
Clock Rising Edge
T
XHDX
Input Data Hold After Clock 0 0 ns
Rising Edge
T
XHDV
Clock Rising Edge to Input 700 10T
CLCL
b
133 ns
Data Valid
SHIFT REGISTER MODE TIMING WAVEFORMS
270501±15
EXTERNAL CLOCK DRIVE
Symbol Parameter Min Max Units
1/T
CLCL
Oscillator Frequency 3.5 16 MHz
T
CHCX
High Time 20 ns
T
CLCX
Low Time 20 ns
T
CLCH
Rise Time 20 ns
T
CHCL
Fall Time 20 ns
EXTERNAL CLOCK DRIVE WAVEFORM
270501±16
12