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 Pinout Header H1 Pinout

IG1 H1 Pinout

The module and header H1 have the same pinout assignment for pins 1-14. All pins 15 and above are only on the module.

Module & 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	GPIO1 Serial 2 input (TTL) Serial input pin from CAN transceiver^* I2C SCL line6
6	G2/Tx/TxCAN/SDA/STROBE	I/O	GPIO2 Serial 2 output (TTL) Serial output pin to CAN transceiver^* I2C SDA line Strobe time sync input
7	G3/Tx0	I/O	GPIO3 Serial 0 output (TTL)
8	G4/Rx0	I/O	GPIO4 Serial 0 input (TTL)
9	G5/SCLK/STROBE	I/O	GPIO5 SPI SCLK Strobe time sync input
10	G6/Rx1/MOSI	I/O	GPIO6 Serial 1 input (TTL) SPI MOSI
11	G7/Tx1/MISO	I/O	GPIO7 Serial 1 output (TTL) SPI MISO
12	G8/CS/STROBE	I/O	GPIO8 SPI CS Strobe time sync input
13	G9/nSPI_EN/STROBE /STROBE_OUT/SPI_DRDY	I/O	GPIO9 SPI Enable: Hold LOW during boot 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/CHIP_ERASE	I/O	Leave unconnected. CHIP ERASE used in manufacturing. !!! WARNING !!! Asserting a logic high (+3.3V) will erase all IMX flash memory, including calibration data.
18	G11	I/O	GPIO11
19	G12	I/O	GPIO12 GPS reset
20	G13/DRDY	I/O	GPIO13 SPI data ready
21	G14/SWCLK	I/O	GPIO14
22	nRESET	I	System reset on logic low. May be left unconnected if not used.
23	GND	PWR	-
24	USB_N	I/O	USB Data Negative Line
25	USB_P	I/O	USB Data Positive Line

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¶

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.