COP8TAB9 Datasheet, PDF (41/59 Pages) National Semiconductor (TI) – 8-Bit CMOS Flash Microcontroller with 2k Byte or 4k Byte Memory

16.0 MICROWIRE/PLUS (Continued)
SK Phase
Normal
Alternate
Alternate
Normal
TABLE 20. MICROWIRE/PLUS Shift Clock Polarity and Sample/Shift Phase
Port G
G6 (SKSEL)
Config. Bit
0
1
0
1
G5
Data Bit
0
0
1
1
SO Clocked Out On:
SK Falling Edge
SK Rising Edge
SK Rising Edge
SK Falling Edge
SI Sampled On:
SK Rising Edge
SK Falling Edge
SK Falling Edge
SK Rising Edge
SK Idle
Phase
Low
Low
High
High
20047538
FIGURE 29. MICROWIRE/PLUS SPI Mode Interface Timing, Normal SK Mode, SK Idle Phase being Low
20047539
FIGURE 30. MICROWIRE/PLUS SPI Mode Interface Timing, Alternate SK Mode, SK Idle Phase being Low
20047540
FIGURE 31. MICROWIRE/PLUS SPI Mode Interface Timing, Normal SK Mode, SK Idle Phase being High
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