System Installation
WADE-8041 User’s Manual
3-6
(2) Example: Watch dog timer count down by "minutes"
o 2e,87
o 2e,87
o 2e,07
o 2f,08 ; select logic device 8
o 2e,30
o 2f,01 ; default active
o 2e,f5
o 2f,08 ; select timer by "minutes"
o 2e,f6
o 2f,05 ; Ex: timer=5 minutes; 00 = Watch dog timer time out disabled
3.6 GPIO
The WADE-8041 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
J22: General Purpose I/O Connector
PIN No.
Signal Description
1
General Purpose I/O Port 0 (W83627HG GP14)
2
General Purpose I/O Port 1 (W83627HG GP10)
3
General Purpose I/O Port 2 (W83627HG GP15)
4
General Purpose I/O Port 3 (W83627HG GP11)
5
General Purpose I/O Port 7 (W83627HG GP16)
6
General Purpose I/O Port 4 (W83627HG GP12)
7
General Purpose I/O Port 5 (W83627HG GP17)
8
General Purpose I/O Port 6 (W83627HG GP13)
9 Ground
10 +5V
All General Purpose I/O ports can only apply to standard TTL
±
5% signal level
(0V/5V), and each source sink capacity up to 12mA.