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GPIO External Wiring

The general purpose input/output board (GPIO) is connected to the external wiring via to main connectors:

The connections on the 35 pin AMPSEAL connector are:

Circuit
CPU Port
AMP pin
number
12 Volts (IN)n/a1
VR1PT02
GPI4PAD073
GPI5PAD064
GPI1PAD005
GPI2PAD016
GPO2PM37
GPO3PM58
GPO4PB49
GPO1PM410
VB1PE0
(PE0 is input only, so another port must be jumpered to VB1 to use that circuit)
11
VB2PA012
CANH(MCP2551)13
VR3PT514
VR2PT615
CANL(MCP2551)16
Groundn/a17
Groundn/a18
Groundn/a19
Groundn/a20
Spare Pin
(Serial Tx)
12V/GND/5V
- or serial
21
Spare Pin
(Serial Rx)
12V/GND/5V
- or serial
22
VB3PE423
EGT1PAD0524
EGT3PAD0325
EGT4PE126
EGT2PAD0427
5 Vref (OUT)28
VR4PT729
GPI3PAD0230
PWM1PT431
PWM2PT332
PWM3PT233
PWM4PT134
VB4PM235

Unlike MegaSquirt® EFI Controller, the GPIO Board does not use a DB9 connector for serial communications. Instead it uses a 2.5 mm (aka. 3/32") sub-miniature stereo jack, of the same spec used for the Innovate LC-1 wide band controller:



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