System Installation
96M4371o
User’s Manual
3-10
3.6
GPIO
The 96M4371o 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
J6: 8-bit GPIO
PIN No.
Signal Description
PIN No.
Signal Description
1
GPIO11
2
GPIO32
3
GPIO12
4
GPIO33
5
GPIO30
6
GPIO36
7
GPIO31
8
GPIO37
9
GND
10
VCC
All General Purpose I/O ports can only apply to standard VCC3=3.3 ± 5% signal level
(0V/3.3V), and each source sink capacity up to 8mA.
3.6.2
96M4371o
GPIO Programming Guide
There are 8 GPIO pins on 96M4371o. These GPIO pins are from SUPER I/O
(IT8721) GPIO pins, and can be programmed as Input or Output direction.
J16 pin header is for 8 GPIO pins and its pin assignment as following :
J6_Pin1=GPIO0:from SUPER I/O_GPIO11 with Ext. 4.7K PH
J6_Pin2=GPIO1:from SUPER I/O_GPIO32 with Ext. 4.7K PH
J6_Pin3=GPIO2:from SUPER I/O_GPIO12 with Ext. 4.7K PH
J6_Pin4=GPIO3:from SUPER I/O_GPIO33 with Ext. 4.7K PH
J6_Pin5=GPIO4:from SUPER I/O_GPIO30 with Ext. 4.7K PH
J6_Pin6=GPIO5:from SUPER I/O_GPIO36 with Ext. 4.7K PH
J6_Pin7=GPIO6:from SUPER I/O_GPIO31 with Ext. 4.7K PH
J6_Pin8=GPIO7:from SUPER I/O_GPIO37 with Ext. 4.7K PH
<<<<< Be careful Pin9=GND , Pin10=VCC >>>>>
There are several Configuration Registers (CR) of IT8721 needed to be programmed
to control the GPIO direction, and status(GPI)/value(GPO). 25h ~ 29h are common
(global) registers to all Logical Devices (LD) in IT8721. LDN=07h contains the Logic-
al Device Number that can be changed to access the LD as needed. LD7 contains the
GPIO11,32,12,33,30,36,31,37 registers.
Содержание 96M4371o
Страница 9: ...System Overview 96M4371o User s Manual 1 6 1 3 1 Mechanical Drawing ...
Страница 10: ...System Overview 96M4371o User s Manual 1 7 ...
Страница 27: ...System Installation 96M4371o User s Manual 3 9 out dx al mov ah 4ch int 21h return dos end pgm ...
Страница 31: ...System Installation 96M4371o User s Manual 3 13 int 10h ...
Страница 33: ...System Installation 96M4371o User s Manual 3 15 and al 00h Parallel Port Disable ...
Страница 35: ...System Installation 96M4371o User s Manual 3 17 out dx al ...
Страница 37: ...System Installation 96M4371o User s Manual 3 19 nop ...
Страница 39: ...System Installation 96M4371o User s Manual 3 21 in al dx ...
Страница 41: ...System Installation 96M4371o User s Manual 3 23 mov ax bx ...
Страница 44: ...System Installation 96M4371o User s Manual 3 26 mov al 02h out dx al ...
Страница 65: ...BIOS Setup Information 96M4371o User s Manual 4 20 H W monitor ...
Страница 66: ...BIOS Setup Information 96M4371o User s Manual 4 21 Thermal Configuration ...