W83697HF Datasheet, PDF (158/167 Pages) Winbond – WINBOND I/O

W83697HF/F
CR70 (Default 0x09 if PNPCSV = 0 during POR, default 0x00 otherwise)
Bit 7 - 4 : Reserved.
Bit [3:0] : These bits select IRQ resource for MIDI Port .
CRF0 (GP5 selection register. Default 0xFF)
When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.
CRF1 (GP5 data register. Default 0x00)
If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.
CRF2 (GP5 inversion register. Default 0x00)
When set to a '1', the incoming/outgoing port value is inverted.
When set to a '0', the incoming/outgoing port value is the same as in data register.
CRF3 (PLED mode register. Default 0x00)
Bit 7 ~ 3 : Reserved .
Bit 2 : select WDTO count mode.
= 0 second
= 1 minute
Bit 1 ~ 0 : select PLED mode
= 00 Power LED pin is tri-stated.
= 01 Power LED pin is droved low.
= 10 Power LED pin is a 1Hz toggle pulse with 50 duty cycle.
= 11 Power LED pin is a 1/4Hz toggle pulse with 50 duty cycle.
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Publication Release Date: Feb. 2002
Revision 0.70