VersaLogic Tetra VL-EPC-2700, Hardware Reference Manual

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Interfaces and Connectors
24 Tetra (VL-EPC-2700) Reference Manual
User I/O (J13)
Table 16. User I/O Pinouts
Pin Signal Description Pin Signal Description
1 AUD_LIN
Audio Left Line Input (Stereo
Left Input)
2 AUD_RIN
Audio Right Line Input (Stereo
Right Input)
3 GND_AUD Analog Audio Ground 4 AUD_LOUT
Audio Left Line Output (Stereo
Left Output)
5 AUD_ROUT
Audio Right Line Output
(Stereo Right Output)
6 GND_AUD Analog Audio Ground
7 PB_CTL_PWR#
Open-Drain Push Button
Control Power Input
8 GND Ground (for PB_CTL_PWR#)
9 PB_CTL_RST#
Open-Drain Push Button
Control Reset Input
10 GND Ground (for PB_CTL_RST#)
11 PLED#
Open-Drain 3.3V max
Programmable LED driver
12 V3P3
3.3V power for Programmable
LED
13 LED_ETH_GRN#
Open-Drain 3.3V max Ethernet
LED driver
14 V3P3 3.3V power for Ethernet LED
15 WDOG1# Watch dog 1 Output 16 GND Ground
17 GPIO1 3.3V General Purpose I/O 18 GPIO2 3.3V General Purpose I/O
19 GND Ground 20 GPIO3 3.3V General Purpose I/O
21 GPIO4 3.3V General Purpose I/O 22 GND Ground
23 GPIO5 3.3V General Purpose I/O 24 GPIO6 3.3V General Purpose I/O
25 GND Ground 26 GPIO7 3.3V General Purpose I/O
27 GPIO8 3.3V General Purpose I/O 28 GND Ground
29 V_BATT Battery Input (3.0V Coin Cell) 30 RETURN_BATT/GND
Tied to GND on CPU board and
direct to the battery minus
terminal on a paddleboard or
external battery connector.
31 GND Ground 32 GND Ground
33 V_MAIN
V_MAIN power. Voltage can be
8V to 17V (default 12V).
34 V_MAIN
V_MAIN power. Voltage can be
8V to 17V (default 12V).