80C251TA 查看數據表（PDF） - Intel
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80C251TA Datasheet PDF : 34 Pages
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8xC251TA/TB/TP/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
6.4 AC Characteristics — Serial Port, Shift Register Mode
Symbol
TXLXL
TQVSH
TXHQX
TXHDX
TXHDV
Table 14. Serial Port Timing — Shift Register Mode
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
Min
12TOSC
10TOSC – 133
2TOSC – 117
0
Max
10TOSC – 133
Units
ns
ns
ns
ns
ns
TXLXL
TXD
RXD
(Out)
RXD
(In)
TXHQX
TQVXH
0
1
2
TXHDV
Valid
Valid
TXHDX
Valid
3
TAV†
Valid
4
Valid
5
Valid
6
Valid
†TI and RI are set during S1P1 of the peripheral cycle following the shift of the eighth bit.
Figure 15. Serial Port Waveform — Shift Register Mode
Set TI†
7
Set RI†
Valid
A2592-02
28
ADVANCE INFORMATION
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