Appendix-A Watchdog; Appendix-B Gpio - Intel 945GME User Manual

Appendix-A Watchdog

The system board provides Watchdog function, the Super I/O setting step as below.
Step 1: CR2D, Bit0→0 (select pin77 to WDTO#)
Step 2: LD8, CR30, Bit0→1 (Active WDTO#)
Step 3: LD8, CRF7, Bit4→Write 0 to clear WDTO# status.
Step 4: LD8, CRF5, Bit3→0: Second mode, 1: Minute mode
Step 5: LD8, CRF6, Bit [7:0] →Set WDTO# Time out value. (WDTO# startup after
setting the system time, or setup from step 3 ~ step 5 to restart WDT.)

Appendix-B GPIO

The system board provides input and output ports that can be individually configured
to perform a simple basic I/O function. Users can configure each individual port to
become an input or output port by programming register bit of I/O selection. To invert
port value, the setting of Inversion Register has to be made. Port values can be set to
read or write through Data Register.
Please refer previous chapter for pin define description.
Access Cash Drawer GPIO Programming Guide
There are two PNP I/O port addresses that can be used to configure GPIO ports,
(1). 0x2E - EFER (Extended Function Enable Register, for entering Extended
- EFIR (Extended Function Index Register, for identifying CR index
(2). 0x2F - EFDR (Extended Function Data Register, for accessing desired CR)
Below are some example codes for demonstrate GPIO function.
FEB-9457 User's Manual
Function Mode)
number)
50