Axiomtek MANO861 - Manual (Page 71)

MANO861 Mini ITX Board
Digital I/O 63
Appendix B
Digital I/O
About Digital I/O
The onboard digital I/O has 8 bits. Each bit can be set to function as input or output by software
programming. In default, all pins are pulled high with +5V level (according to main power). The
BIOS default settings are 4 inputs and 4 outputs where all of these pins are set to 1.
JDIO
Digital I/O Programming
Assembly sample code :
#define NCT6776F_CONFIG_INDEX 0x2e
#define NCT6776F_CONFIG_DATA 0x2f
#define NCT6776F_CONFIG_MODE_ENTER_VALUE 0x87
#define NCT6776F_CONFIG_MODE_EXIT_VALUE 0xAA
#define NCT6776F_LDN_SEL_REGISTER 0x07
#define NCT6776F_ACTIVATE_REGISTER 0x30
#define NCT6776F_LDN_GPIO1 0x07
#define NCT6776F_LDN_GPIO3 0x09
#ifdef Oem_NCT6776F_Digital_IO_PRESENT
#if Oem_NCT6776F_Digital_IO_PRESENT
UINT8 Data8=0;
IoWrite8(NCT6776F_CONFIG_INDEX , NCT6776F_CONFIG_MODE_ENTER_VALUE);
IoWrite8(NCT6776F_CONFIG_INDEX , NCT6776F_CONFIG_MODE_ENTER_VALUE);
Pin Signal
1 SIO_GPIO0
2 SIO_GPIO4
3 SIO_GPIO1
4 SIO_GPIO5
5 SIO_GPIO2
6 SIO_GPIO6
7 SIO_GPIO3
8 SIO_GPIO7
9 SMB_CLK_MAIN
10 SMB_DAT_MAIN
11 GND
12 VCC GPIO