Interconnections
All connections to the AT210 are provided by a single DB9 cable assembly.
AT210 Pin Applications and Colour Code
Pin
Function
Wire colour
1
VIN 7 - 36 VDC
red
2
RS232-TX1
green
3
RS232-RX1
blue
4
DIG-OUT
yellow
5
GND
black
6
ADC
pink
7
DIG-IN1
white
8
DIG-IN2
brown
9
IBUTTON
grey
Digital Inputs
Digital inputs 1 and 2normally low and can be connected directly to 12/24V vehicle circuits.
Digital Output
The AT210 is capable of switching an external load of up to 30V, 0.5A using a MOSFET Low Side
Switch, which must be used to switch the GND side of the load. The use of a 1A in-line fuse with
these switches is essential to prevent any damage through fault scenarios.
Analogue to Digital Converter (ADC) Input
The ADC input can be used to measure analogue voltages up to 5.0V maximum
External scaling can be used to measure higher voltages if necessary.
Integrated Accelerometer(s)
The AT210 has a built in 3 axis MEMS accelerometer that operates in the range ±2g and is used
to measure driver behaviour (acceleration and braking) during normal driving conditions.
The accelerometer also allows the AT210 to wake from sleep on movement, with configurable
thresholds. Please refer to the MEMS parameter and Power Management section for more
details.
iButton (Dallas Key) Interface
This can be used to read iButton devices for the purpose of Driver Identification. See the Driver
ID Application Note for more details of how to use this feature.