Evido EAD-D2000 Manual de usuario Pagina 33

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CT-CCV6X Intel Atom D2000/N2000 COM Express Type 6 Module
33
4.16.2.5 PSUEDO CODE
Example 1 Change GPIO2 from output to input
Step1: ByteData = ReadIOByte(0x504) //Read current setting from
configuration register
Step2: ByteData = ByteData | Bit 4 //Set Bit4 1. It means input
Step3: WriteIOByte(0x504, ByteData) //Write back to configuration register
Example2 Set GPIO3 to output LOW
Step1: ByteData = ReadIOByte(0x50C) //Read current setting from Output
Port register
Step2: ByteData =ByteData & 0xDF //Set Bit5 0. It means output low
Step3: WriteIOByte(0x50C, ByteData) //Write back to Output Port
Register
4.17 Power and System Management Signals
Signal
I/O
Description
SUS_S3#
O
Indicates system is suspended to RAM state.
Active low output.
SUS_S4#
O
Indicates system is suspended to Disk state.
Active low output.
SUS_S5#
O
Indicates system is in Soft Off state.
SUS_STAT#
O
Indicates imminent suspend operation.
PWRBTN#
I
Power button to bring system out of S5 (soft off),
active on rising edge.
PWR_OK
I
Power OK from main power supply
BATLOW#
I
Indicates that external battery is low.
SYS_RESET#
I
Reset button input. Active low input.
CB_RESET#
O
Carrier Board Reset. Active low input.
WAKE0#
I
PCI Express wake up signal.
WAKE1#
I
General purpose wake up signal.
VCC_RTC
I
RTC External Battery
LID#
I
LID switch
SLEEP#
I
Sleep Button
FAN_PWMOUT
O
FAN PWM out
FAN_TACHIN
I
Fan Tacho in
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