Portwell WADE-8075, User Manual

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System Installation
WADE-8075 / WADE-8076 User’s Manual 3-5
Definitions of Variables:
Value of Count-mode Register :
1) 0x00 -- Count down in seconds (Bit3=0)
2) 0x08 -- Count down in minutes (Bit3=1)
Value of
Time-out Value Register :
1) 0x00 -- Time-out Disable
2) 0x01~0xFF -- Value for counting down
3.6 GPIO
The motherboard provides 16 input / output ports that can be individually
configured to perform a simple basic I/O function.
GPIO Pin Assignment
The WADE-8075 provides 16 input/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.
The GPIO port is located on J15 & J16 shown as follows. Please note:
DO NOT
SHORT-CIRCUIT PIN 9 AND 10 OF J15 & J16!
The control for the GPIO signals is handled through a separate 2-byte I/O space.