VDX104 Manual - Tri-M Systems Inc.

18-Nov-2010
VDX104 Manual
Port2 Function: must be selected as GPIO
Port2 Bit 0 Direction: set as output to control power switch of the USB port 0.
set as input force the factory default.
Output: 0 turn the power switch of the USB port 0 OFF.
1 turn the power switch of the USB port 0 ON.
Port2 Bit 1 Direction: set as output to control power switch of the USB port 1.
set as input force the factory default.
Output: 0 turn the power switch of the USB port 1 OFF.
1 turn the power switch of the USB port 1 ON.
Port2 Bit 2 Direction: UNUSED
Port2 Bit 3 Direction: enable/disable the on-board LEDs.
set as input force the factory default.
Output: 0 enable the on-board LEDs.
1 disable the on-board LEDs
Port2 Bit 4 Direction: this setting must be set always as input.
used to read the power switch status of the USB port 0.
read 0 when the power switch over current flag is set.
read 1 when the power switch is operating normally.
Port2 Bit 5 Direction: this setting must be set always as input.
used to read the power switch status of the USB port 1.
read 0 when the power switch over current flag is set.
read 1 when the power switch is operating normally.
Port2 Bit 6 Direction: select if the SPI port access the on-board SPI flash or SPI connector CN17. set as
input force the factory default.
Output: 0 access the on-board SPI flash.
1 access the SPI connector CN17.
Port2 Bit 7 Direction: allow to write protect the on-board Micro-SD.
set as input force the factory default.
Output : 0 allow to write to the Micro-SD.
1 the Micro-SD is write protected.
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