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Document MT0605P.2018.E
© Xsens Technologies B.V.
MTi User Manual
Table 23: Pin connections OEM headers
Pin
Functionality
Pin
Functionality
10_1
Vin (4.5-34V)
6_1
GND
10_2
SyncIn
6_2
Vin (3V3)
10_3
RS232 RxD / RS/ RS485 (TxD/RxD-)
6_3
UART_TX
10_4
GND
6_4
UART_RX
10_5
RS232 TxD / RS422_TxD- / RS485 (TxD/RxD+)
6_5
GND
10_6
SyncOut
6_6
Reserved
10_7
USB DM (D-) / RS422_RxD-
10_8
GND
10_9
USB DP (D+) / RS
10_10
ClockSync
Pin 1 of the 10-pins header and pin 1 of the 6-pins header are labelled on the PCB.
Figure 12: The pins of the headers on the MTi-OEM are clearly marked
Start-up procedure
The MTi starts up with communication over the serial (RS232/RS485/RS422) interface by default:
-
If alternative UART is set, the MTi will switch to alternative UART
-
If USB is detected, the MTi will switch to USB communication
-
WakeUp message sent
-
If WakeUp is not interrupted, the MTi will be put in Measurement Mode.
-
Plugging in USB at any time will let the MTi switch to USB immediately.
When for some reason, the MTi becomes unresponsive in serial mode and unplugging/connecting the
MTi does not solve the communication problem, just connect the MTi to a USB port and check the
settings of the device. If a direct USB connection is not possible, i.e. when using an RS422 device or a
serial to USB converter cable, there is a Restore Communication tool available in MT Manager (see
[MTM], not available for alternative UART).
Alternative UART
With the MTi-OEM, the alternative UART is available. This UART interface is a direct serial interface
with 3V3 CMOS levels. It can be used e.g. on embedded systems. The UART frame configuration is 8
data bits, no parity and 1 stop bit (8N1). The baud rate of the MTi is 115200 by default, but can be
adjusted in MT Manager [MTM] or using low-level communication commands [LLCP]. To configure the
