Intel 83C51FA - Manual (Page 12)

AUTOMOTIVE 80C51FA/83C51FA
SERIAL PORT TIMING-SHIFT REGISTER MODE
Test Conditions
: T
A e b
40 C to
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 m
s
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