AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 205)

Page 205 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
GPIO as simple 0-5V analog input example
GPIO as Analog Input combined with Other Functions
Tuning Tip The following is a creative example of how the GPIOs can be combined and
used with other software functions to accomplish complex objectives.
GPIO setup:

GPIO5 as an analog input (0-5V fuel pressure transducer)

GPIO1 as a simple switched output driver (warning lamp)
EMS functions combined:

Alt function

Analog Switch 7
Goal: Activate a function that retards ignition timing by a certain amount, adds a fuel trim and
activates a warning light when the fuel pressure falls below a safe level.