Interconnections
All connections to the AT200 are provided by a single 16-way connector.
AT200 Pin Applications and Colour Code
Pin
Function
Wire colour
1
JTMS
2
JTDI
3
RS232-TXD
GREEN
4
VIN 7 - 36 VDC
RED
5
DIGITAL INPUT 1
WHITE
6
DIGITAL OUTPUT
YELLOW
7
JTCK
8
JTRST
9
JTNRST
10
JTDO
11
RS232-RXD
BLUE
12
GND
BLACK
13
DIGITAL INPUT 2
BROWN
14
IBUTTON
GREY
15
VDD-DIG
ORANGE
16
GND
Digital Inputs
Digital inputs 1 and 2 suitable for use in ‘power-take-off’ applications and can be connected
directly to 12/24V vehicle circuits.
Digital Output
The AT200 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.
Integrated Accelerometer(s)
The AT200 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 AT200 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.
