C&T Solution CT-XHW0X, User Manual

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CT-XHW0X Intel 4th Gen Core Processor i7/i5/i3/Celeron Industrial Mini-ITX MB
３５
Bit X = 1 means Output Mode
4.13.1.2.2 GPIO Output Data Select

GPIO Output Data Register
(Index port=0xA00, Data port=0xA01, Offset=0x89)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
GPO3 GPO2 GPO1 GPO0 GPI3 GPI2 GPI1 GPI0
Note.
Bit X = 0 outputs 0 when in output mode
Bit X = 1 outputs 1 when in output mode
4.14 Watchdog Timer
4.14.1 Board Design
The WDT (Watchdog Timer) is implemented by Fintek F81866A.
Register Address
WDT Base Address
0xA10
4.14.2 PSUEDO CODE

Set WDT Time Unit (Second Unit)
Step1: ByteData = ReadIOByte(0xA15) //Read current setting
Step2: ByteData = ByteData & 0xF7 //Set time unit to “second”
Step3: WriteIOByte(0xA15, ByteData) //Write back
 Set WDT Time Value
Step1: WriteIOByte(0xA16, Time) //Set watch dog time value

Enable WDT
Step1: ByteData = ReadIOByte(0xA15) //Read current setting
Step2: ByteData = ByteData | 0x20 //Enable WDT
Step3: WriteIOByte(0xA15, ByteData) //Write back