System Installation
PEB-2737VLA User
’s Manual
3-6
Step(4) : LD8_CRF7_bit[7,6]P[0,0]
Not allow K/B and Mouse’s interrupts to reload WDT timer.
outportb ( EFIR , 0xF7 ) ;
al_char1 = inportb ( EFDR ) & 0x3F ; // CRF7_bit[7,6]P[0,0]
outportb ( EFIR , 0xF7 ) ;
outportb ( EFDR , al_char1 ) ;
Step(5) : Refresh WDT before it expires.
Once WDT expires , system will be reset.
LD8_CRF5_bit3 : 0 : second unit
1 : minute unit
LD8_CRF6 : T
wd
, “Writing 00” means “disable WDT”
1~255 time unit ( time unit : second, minute )
Notes:
“CR2B_bit4P0“ means ”Write 0 to bit4 of Configuration Register 0x2B”.
3.6
GPIO
CN9 : General Purpose Input/Output Interface Connector
There are 8 GPIO pins on PEB-2737VLA. GP10, GP11, GP12 and GP13 are dedicated
GPO pins with 12mA current sink capacity at 5V signal level. The output signals
have internal weak pull-high resistor, 4.7K Ohm, to 5V.The GPO signals are driven
by W83627DHG GP30 ~ 33 pins.
GP14, GP15, GP16 and GP17 are dedicated GPI pins. They are first inverted and then
connected to W83627DHG GP34~37 pins.
