APPENDIX A IMU Technical Specifications
OEM7 SPAN Installation and Operation User Manual v14
266
Pin
Signal
Type
Description
Comments
1
IMU_VDD
Output Power
Positive voltage supply for IMU logic circuits
IMU_VDD must be +3.3 VDC
2
IMU_VDD
Output Power
Positive voltage supply for IMU logic circuits
3
SPI_NSS
Slave Select
LVCMOS level, not 5V tolerant
4
SPI_SCK
Output
Serial Clock
LVCMOS level, not 5V tolerant
5
DGND
Digital Ground
6
SPI_MOSI
Output
Master Output / Slave Input
LVCMOS level, not 5V tolerant
7
SPI_MISO
Input
Master Input / Slave Output
LVCMOS level, not 5V tolerant
8
DGND
Digital Ground
9
IMU_DIO1
Bidirectional
LVCMOS level, not 5V tolerant
10
IMU_DIO2
Bidirectional
LVCMOS level, not 5V tolerant
Table 153: Pinouts for IMU Connector (P701)
Board State
Status LED 1
Status LED 2
Status LED 3
Bootup
Toggles at 2 Hz
Self-test
Off
On
Normal Operation
On
Toggles at 2 Hz
GPS Time
Toggles at 2 Hz
IMU Data
No IMU Connected
Toggles t 1 Hz
Error
Toggles at 2 Hz
GPS Time
Toggles at 1 Hz
Error
Table 154: MIC LED Indicator Drivers
When the MIC boots up, it requires approximately 10 seconds to perform a self-test.
If a software update has been performed, the board can take up to 70 seconds at startup to complete the
reprogramming.
