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14
Pin
Name
Pin
Name
1
LED1P (3.3V)
2
LED1N
3
LED2P(3.3V)
4
LED2N
5
LED3P(3.3V)
6
LED3N
7
GPIO
8
GND
3.6
System Status LEDs Indicator & SW1
How to use the status indicator LEDs and Micro switch SW1?
After system completed boot, enter I/O space based address 500H and change some
register value as follow:
LED16
1.
Set 5000H+0CH, bit7
2.
the LED will light
3.
clear the 500H+0CH, bit7
4.
the LED will dark
LED17
1.
Set 500H+0CH, bit6
2.
the LED will light
3.
clear the 500H+0CH, bit6
4.
the LED will dark
LED6
1.
Set 500H+0FH, bit28
2.
the LED will light
3.
clear the 500H+0FH, bit28
4.
the LED will dark
SW1
1.
Set 500H+0DH, bit13 ,means direction is input
2.
press SW1 ,then 500H+0DH ,bit13 will be changed to 0
3.
when SW1 release, 500H+0DH ,bit13 will be changed to 1 (default)