To support a wide range of hardware applications, the AU7 is equipped with a large number of inputs and
outputs.
6 Digital Inputs (IN0, IN1, IN2, IN3, IN4 and IN5): IN0, IN1 and IN4 are positive triggers (Triggering
Voltage Range: 3.7 ~ 40V). IN0 is dedicated to ACC (Ignition). IN2, IN3, and IN5 are negative triggers
(Triggering Voltage Range 0 ~ 0.8V). These triggers can be used in the following application areas:
engine detection, car door open/close detection, and Panic Button in case of any emergency.
3 Digital Outputs (OUT1, OUT2, and OUT3): They are normally used for engine or ignition
immobilization. Please refer to our AU7 Quick Start Guide for details on how to set up relays for these
applications. These digital outputs are open collector type. When in the “ON” state, these outputs are
grounded (GND). When in the “OFF” state, it forms an open circuit. Note: Please do not connect a
positive voltage any output pin!!!
2 Analog Inputs (AN1 and AN2): Each input is usually connected to an external temperature sensor or
fuel level senor. The voltage range of AN1 is 0 ~ 40V 12-bits resolution. The voltage range of AN2 is 0 ~
5V 12-bits resolution.
1 Digital Output/Analog Input (OUT4/AN3): This port may be configured as a digital output or analog
input through the AT$IOCG command. The voltage range of AN3 is 0 ~ 40V 12-bits resolution. Refer to
the AT$IOCG command reference section for details. Note: Please do not connect a positive voltage
to an output pin!!!
1-Wire: it uses a single wire to transmit both data and power. You may use 1-Wireto connect up to
five devices, for instance, one iButtonand four temperature sensors.
