Sensoray 812 - Manual (Page 12)

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ON ON ON ON Route internal GP16~GP23 on the TW6869
as the GPIO1~GPIO8;
Connect them to the TB1~TB8 and J3 (34-pin)
connector
LED
Power-OK indicators: D1 and D2
The LED D1 and D2 are used for indicating on-board Power-OK status.
LED Description
D1 Main Power, 3.3V Power-OK Status
D2 Core Power, 1.2V Power-OK Status
(for the Video Decoder Chipset TW6869, core power status
monitoring)
GPIO Status Indicators: D9 ~ D16
The LED D9, D10, …, and D16 are used for indicating the status of the GPIO (General
Purpose Digital Input/Output) pin signals, labeled as GPIO1, GPIO2, …, and GPIO8 on
the board, and directly connected to the TB1 ~ TB8 and J3 (34-pin) connector’s digital
in/out pins. A logic ‘0’ (low) turns the LED on and a logic ‘1’ (high) turns it off.
LED Lable Signal
D9 GPIO1 Status of GPIO1 ( ‘0’  On and ‘1’  Off )
D10 GPIO2 Status of GPIO2 ( ‘0’  On and ‘1’  Off )
D11 GPIO3 Status of GPIO3 ( ‘0’  On and ‘1’  Off )
D12 GPIO4 Status of GPIO4 ( ‘0’  On and ‘1’  Off )
D13 GPIO5 Status of GPIO5 ( ‘0’  On and ‘1’  Off )
D14 GPIO6 Status of GPIO6 ( ‘0’  On and ‘1’  Off )
D15 GPIO7 Status of GPIO7 ( ‘0’  On and ‘1’  Off )
D16 GPIO8 Status of GPIO8 ( ‘0’  On and ‘1’  Off )