C&T Solution CT-CCV6X, User Manual

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CT-CCV6X Intel Atom D2000/N2000 COM Express Type 6 Module
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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