Interoperability With Different Voltage Systems; Reset Line - Advanced Navigation Motus Reference Manual

Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Table 19: Pin allocation table
13.2.1

Interoperability with Different Voltage Systems

All signals are 3.3 volt level, however inputs are tolerant to 5 volt signals from the
target interface. If you require a different voltage level to be compatible with your
target system it is recommended that you install a voltage level translator between
the signals of each device. To power the translator 3.3V is provided on pin 7 of the
Motus OEM connector. This supply is only capable of driving up to 25mA and should be
appropriately decoupled when powering a circuit.
13.2.2

Reset Line

The reset line is internally pulled high on Motus OEM. This pin must be left floating for
normal operation. If a user wishes to reset Motus OEM the pin can be pulled low
externally to force a reset. It is important that this signal is not driven high under any
circumstances as it will prevent the Motus OEM from functioning correctly. Please keep
the reset line track length to a minimum to avoid noise.
Function
Supply Voltage
Ground
Supply Voltage
Ground
Supply Voltage
Ground
3.3V translator supply, see section 13.2.1
Ground
Primary UART receive
Reset line, see section 13.2.2
Primary UART transmit
No connection
No connection
Auxiliary UART transmit
No connection
Auxiliary UART receive
No connection
No connection
Motus Reference Manual
Page 79 of 146
Version 1.1
29/11/2019
GPIO1
GPIO2