M80C51FB
SERIAL PORT TIMING - SHIFT REGISTER MODE
Test Conditions (Over Specified Operating Conditions)
Symbol
Parameter
12 MHz 16 MHz
Oscillator Oscillator
Variable
Oscillator
Units
Min Max Min Max
Min
Max
TXLXL Serial Port Clock Cycle Time 1
0 75
12TCLCL
ms
TQVXH Output Data Setup to Clock 700
492
10TCLCLb133
ns
Rising Edge
TXHQX Output Data Hold after
50
8
2TCLCLb117
ns
Clock Rising Edge
TXHDX Input Data Hold After Clock 0
0
0
ns
Rising Edge
TXHDV Clock Rising Edge to Input
Data Valid
700
492
10TCLCLb133 ns
SHIFT REGISTER MODE TIMING WAVEFORMS
271172 – 13
11