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Hardware Integration: IG-2 (IMX5 + GPX1)

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The Inertial Sense IG-2 is a PCB module with IMX-5 and GPX-1 multi-frequency GNSS receiver.

  • Surface mount reflowable.
  • Onboard dual GNSS for simultaneous RTK positioning and GPS compassing.
  • Micro USB and 14 pin I/O header for convenient evaluation.

Pinout

Module Pinout

IG1 Module PinoutHeader H1 Pinout

IG1 H1 Pinout

The IG-2 module and IG-2 header H1 have the same pinout assignment for pins 1-14. Because H1 only has 14 pins, pins 15 and above listed in the following table are only on the IG-2 module.

IG-2 Module
& IG-2 H1 Pin
Name I/O Description
0 GND PWR All other pins not shown in the image are pin 0 tied to GND.
1 GND PWR -
2 VIN PWR 4V-20V supply voltage input
3 +3.3V PWR Regulated 3.3V supply input/output.
4 Reserved Not Connected
5 G1/Rx2/RxCAN/SCL I/O IMX GPIO1
Serial 2 input (TTL)
Serial input pin from CAN transceiver*
I2C SCL line6
6 G2/Tx/TxCAN/SDA/STROBE I/O IMX GPIO2
Serial 2 output (TTL)
Serial output pin to CAN transceiver*
I2C SDA line
Strobe time sync input
7 G3/Tx0 I/O IMX GPIO3
Serial 0 output (TTL)
8 G4/Rx0 I/O IMX GPIO4
Serial 0 input (TTL)
9 G5/SCLK/STROBE I/O IMX GPIO5
SPI SCLK
Strobe time sync input
10 G6/Rx1/MOSI I/O IMX GPIO6
Serial 1 input (TTL)
SPI MOSI
11 G7/Tx1/MISO I/O IMX GPIO7
Serial 1 output (TTL)
SPI MISO
12 G8/CS/STROBE I/O IMX GPIO8
SPI CS
Strobe time sync input
13 G9/nSPI_EN/STROBE
/STROBE_OUT/SPI_DRDY
I/O IMX GPIO9
SPI Enable: Hold LOW during bootup to enable SPI on G5-G8
Strobe time sync input or output. SPI data ready alternate location.
14 GPS.TIMEPULSE O GPS PPS UTC time synchronization signal.
15 GND I/O -
16 VBAT I/O GPS backup supply voltage. (1.4V to 3.6V) enables GPS hardware backup mode for hot or warm startup (faster GPS lock acquisition). MUST connect GPS_VBAT to VCC if no backup battery is used.
17 G10/BOOT_MODE I/O Leave unconnected. IMX BOOT MODE used in manufacturing. !!! WARNING !!! Asserting a logic high (+3.3V) will cause the IMX to reboot into ROM bootloader (DFU) mode.
18 G11 I/O IMX GPIO11
19 G12 I/O IMX GPIO12
GPS reset
20 G13/DRDY I/O IMX GPIO13
SPI data ready
21 G14/SWCLK I/O IMX GPIO14
22 nRESET I System reset (IMX and GPX) on logic low. May be left unconnected if not used.
23 GND PWR -
24 USB_N I/O IMX USB Data Negative Line
25 USB_P I/O IMX USB Data Positive Line

IG-2 Schematic

Download Schematic

Hardware Versions

The following outlines the differences between the IG-2 hardware versions.

IG-2.1

IG-2.0

Soldering

The IMX-5 can be reflow soldered. Reflow information can be found in the Reflow Information page of this manual

Hardware Design

Recommend PCB Footprint and Layout

The default forward direction is indicated in the PCB footprint figure and on the silkscreen as the X axis. The forward direction is reconfigurable in software as necessary.

Download PDF

Design Files

Open source hardware design files, libraries, and example projects for the IMX module are found at the Inertial Sense Hardware Design repository hosted on GitHub. These include schematic and layout files for printed circuit board designs, and 3D step models of the InertialSense products usable for CAD and circuit board designs.

Reference Design Projects

The EVB-2, IG-1, and IG-2 circuit board projects serve as reference designs that illustrate implementation of the IMX PCB module.

EVB-2 evaluation board

IG-1 module

IG-2 module

Part Manufacturer Manufacturer # Description
H1 JST GHR-14V-S 14 pin connector 1.25mm pitch for IMX I/O connection.