DFI BT253 - Manual (Page 15)

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15
Chapter 2 Hardware Installation
Chapter 2
Digital I/O Power Select
JP17 is used to select the power of DIO (Digital I/O) signal.
Digital I/O Output State
Based on the power level of DIO (Digital I/O) selected on JP17, JP20 (DIO pin 0-3) and JP18
(DIO pin 4-7) are used to select the state of DIO output: pull high or pull low. When selecting
pull high, the power selection will be the same as JP17’s setting.
3 3
1 3 2
1 3 2
1-2 On:
+5V_standby
2-3 On: +5V
(default)
JP17
JP20 (DIO 0-3)
JP18 (DIO 4-7)
1 3 2
1 3 2
1-2 On:
GND (default)
2-3 On:
+5V or +5V_standby