Nexcom EBC 572 Series, User Manual

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70 Appendix B EBC572 User’s Manual
This appendix provides definitions for the four GPI/ O pins in the E BC572(A). GPI/ O (General Purpose
Input/ Output) pins are provided for cus tom system design. The pin programming as input mode (GPI) or
output mode (GPO) is depending on t he c onfiguration. The pin definit ions are shown in the following
table:
Table B-1 : J38 - GPI/O Connector Pin Definition
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All digital output have pull-up to +3.3V
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BIOS controls the GPI/O Default Function
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Bit1~3: Reading the bit returns the digital input corresponding pin. Write is ignored.
0 - Corres ponding pin level low
1 - Corres ponding pin level high
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Bit4~7: The bit corresponds to pin of digital output. Reading the bit returns it’s value that written
before.
0 - Corresponding pin driven to low
1 - Corresponding pin releas ed to high (default)
Pin
No.
GPI/O mode
Default
Corresponding
Pin
Default
PowerOn
Pin
No.
GPI/O mode
Default
Corresponding
Pin
Default
PowerOn
1 Digital Output 1 1 Read High 2 Digital Input 1 1 High
3 Digital Output 2 1 Read High 4 Digital Input 2 1 High
5 Digital Output 3 1 Read High 6 Digital Input 3 1 High
7 Digital Output 4 1 Read High 8 Digital Input 4 1 High
9 VCC5 - 10 GND -
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