Advanced Navigation Spatial Dual Reference Manual page 82

Additionally GPIO1 can function as an RS232 serial transmit line and GPIO2 can act as
an RS232 serial receive line. The GPIO serial and auxiliary RS232 baud rate can be
configured anywhere from 1200 to 1000000 baud by using the baud rate configuration
dialogue in Spatial Dual Manager or the Baud Rates Packet.
The GPIO pin functions and auxiliary RS232 functions available are listed below. The
function of a GPIO pin or auxiliary RS232 can be changed at any time using the GPIO
configuration dialogue in Spatial Dual Manager or the GPIO Configuration Packet. GPIO
1 and GPIO 2 function at 0 – 5 volt levels for digital input, digital output, frequency
input and frequency output. When a serial data function is selected that GPIO pin
automatically switches to RS232 level.
Function
Inactive
1PPS Output
GNSS Fix Output
Odometer Input
Zero Velocity Input
NMEA Input
NMEA Output
Novatel GNSS Input
Topcon GNSS Input
ANPP Input
ANPP Output
Disable GNSS
Disable Pressure
Set Zero Orientation Alignment
System State Packet Trigger
Raw Sensors Packet Trigger
RTCM Differential GNSS Corrections Input
Trimble GNSS Input
u-blox GNSS Input
Hemisphere GNSS Input
Left Wheel Speed Sensor
Right Wheel Speed Sensor
1PPS Input
Wheel Speed Sensor
Wheel Encoder Phase A
Spatial Dual Reference Manual
Page 81 of 137
Version 2.3
12/04/2016
Type
Tristate
Digital Output
Digital Output
Frequency Input
Digital Input
Serial Receive
Serial Transmit
Serial Receive
Serial Receive
Serial Receive
Serial Transmit
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Serial Receive
Serial Receive
Serial Receive
Serial Receive
Frequency Input
Frequency Input
Digital Input
Frequency Input
Frequency Input
GPIOs Auxiliary
RS232
All All
All
All
All
All
2 Receive
1 Transmit
2 Receive
2 Receive
2 Receive
1 Transmit
All
All
All
All
All
2 Receive
2 Receive
2 Receive
2 Receive
All
All
All
All
All