N80C251TB24 Datasheet, PDF (34/36 Pages) Intel Corporation – TQHIGH-PERFORMANCE CHMOS MICROCONTROLLER

8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
6.4 AC Characteristics — Serial Port, Shift Register Mode
Symbol
T_XLXL
T_QVSH
T_XHQX
T_XHDX
T_XHDV
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
12T_OSC
10T_OSC – 133
2T_OSC – 117
0
Max
10T_OSC – 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