Interoperability With Different Voltage Systems; Reset Line; Basic Connection - Advanced Navigation Spatial OEM Reference Manual

Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Table 7: Pin allocation table
5.3.1

Interoperability with Different Voltage Systems

All signals are 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 3V is provided on pin 7 of the Spatial OEM connector. This supply is only capable of
driving up to 50mA and should be appropriately decoupled when powering a circuit.
5.3.2

Reset Line

The reset line is internally pulled high on Spatial OEM. This pin must be left floating for normal
operation. If a user wishes to reset Spatial 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
Spatial OEM from functioning correctly. Please keep the reset line track length to a minimum to
avoid noise.
5.3.3

Basic Connection

Please see Illustration 20 for the basic electrical connections required by Spatial OEM.
Spatial OEM Reference Manual
Function
Supply Voltage
Ground
Supply Voltage
Ground
Supply Voltage
Ground
3V translator supply, see section 5.3.1
Ground
Primary UART receive
Reset line, see section 5.3.2
Primary UART transmit
GPIO1
GPIO5
GPIO2
GPIO6
GPIO3
Do not connect
GPIO4
Do not connect
Do not connect
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Version 2.7