COP8-REF-FL1 National Semiconductor, COP8-REF-FL1 Datasheet - Page 47

• Manufacturer Part Number: COP8-REF-FL1
• Description: KIT REF DESIGN FOR COP8SDR9
• Manufacturer: National Semiconductor
• Series: COP8™r
• Type: MCUr

Specifications of COP8-REF-FL1

• Design Resources: COP8 Flash Ref Design Flyer
• Contents: PCB, Control Interface, Documentation and 9V Battery
• For Use With/related Products: COP8SDR9
• Lead Free Status / RoHS Status: Not applicable / Not applicable

11.0 MICROWIRE/PLUS
clock. The SIO register is shifted on each falling edge of the
SK clock. In the alternate SK phase operation, data is shifted
in on the falling edge of the SK clock and shifted out on the
rising edge of the SK clock. Bit 6 of Port G configuration
register selects the SK edge.
SK Phase
Alternate
Alternate
Normal
Normal
FIGURE 28. MICROWIRE/PLUS SPI Mode Interface Timing, Alternate SK Mode, SK Idle Phase being Low
FIGURE 29. MICROWIRE/PLUS SPI Mode Interface Timing, Normal SK Mode, SK Idle Phase being High
FIGURE 27. MICROWIRE/PLUS SPI Mode Interface Timing, Normal SK Mode, SK Idle Phase being Low
G6 (SKSEL)
Config. Bit
TABLE 30. MICROWIRE/PLUS Shift Clock Polarity and Sample/Shift Phase
0
1
0
1
Port G
(Continued)
G5 Data
Bit
0
0
1
1
SO Clocked Out On:
SK Falling Edge
SK Falling Edge
SK Rising Edge
SK Rising Edge
47
A control flag, SKSEL, allows either the normal SK clock or
the alternate SK clock to be selected. Refer to Table 30 for
the appropriate setting of the SKSEL bit. The SKSEL is
mapped into the G6 configuration bit. The SKSEL flag will
power up in the reset condition, selecting the normal SK
signal provided the SK Idle Polarity remains LOW.
SI Sampled On:
SK Falling Edge
SK Falling Edge
SK Rising Edge
SK Rising Edge
20026436
20026438
20026437
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SK Idle
Phase
High
High
Low
Low