Portwell AMDY-7002, User Manual

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System Installation
AMDY-7002 User’s Manual 3-5
3.6 GPIO
The AMDY-7002 provides 8 programmable input or output ports that can be
individually configured to perform a simple basic I/O function. Users can configure
each individual port to become an input or output port by programming register bit
of I/O Selection. To invert port value, the setting of Inversion Register has to be
made.
Port values can be set to read or write through Data Register.
3.6.1 Pin assignment
JP11 Function
Pin 1 GP 0
Pin 2 GP 4
Pin 3 GP 1
Pin 4 GP 5
Pin 5 GP 2
Pin 6 GP 6
Pin 7 GP 3
Pin 8 GP 7
Pin 9 GND
Pin 10 VCC
*Note:
a. This GPIO uses TTL level.
b. GPIO base address is 4EE, default direction is output.
3.6.2 Demo Program
The following is demo program source code by C language.
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#define SIO_Port 0x2E
#define SIO_Port2 0x4E
#define GPIO_LDN 0x07
#define GPIO_Base 0x0A00
//Enter SIO
void Enter_IT872x_SIO() {
outp(SIO_Port, 0x87);
outp(SIO_Port, 0x01);
outp(SIO_Port, 0x55);
outp(SIO_Port, 0x55);
}
//Select LDN