103695
Contents
103695 - IMU Adapter Board
Description
103695 is an adapter board used with the 10369 interface board to connect Analog Devices inertial measurement units (IMU) such as (ADIS-16375, ADIS-16405 and similar to the Elphel Model 353 camera.
Adapter uses two general purpose I/O of the camera FPGA, available on each of the 10369 USB/extension connectors J9..J11. The 103695 board provides 3.3V/5.0V power to the IMU (selectable by on-board resistors) and supports different speed SPI interface to the sensor unit. The device connector (J2) can accommodate a number of Analog Devices units, it should be possible to use the board with connector adapter with other SPI sensors.
Camera interface to the 103695 board is implemented in the FPGA (starting with firmware revision 8.1.0). Up 28 different 16-bit registers (plus 8 bytes of the timestamp with 1 microsecond resolution) are periodically addressed, read and stored in the camera system memory over the DMA channel. The logged register addresses are programmed at run time in the FPGA using the device driver.
Connectors
J1 - to 10369 board
| Pin | Signal | Notes |
|---|---|---|
| 1 | VP33IN | +3.3V power input |
| 2 | MISO | output to the FPGA (multiplexed data/ready from SPI) |
| 3 | NMISO | composite input from the FPGA, source of SPI output signals |
| 4 | SDA | i2c SDA |
| 5 | SCL | i2c SCL |
| 6 | GND | ground |
| 7 | VP5IN | USB +5V power, not used |
| 8 | DM | USB data - , not used |
| 9 | DP | USB data + , not used |
| 10 | GND | ground |
J2 - to IMU
| Pin | Signal | Notes |
|---|---|---|
| 1 | DIO3 | connected to wire pad W7 |
| 2 | DIO4 | connected to wire pad W8 |
| 3 | SCLK | SPI clock, output |
| 4 | IMU_MISO | SPI data, input |
| 5 | IMU_MISO | SPI data, output |
| 6 | IMU_NCS | SPI CS, active low, output |
| 7 | DIO1 | connected to wire pad W9 |
| 8 | IMU_NRESET | IMU reset, active low, output |
| 9 | IMU_READY | also DIO2, by deafult set as IMU data ready, input |
| 10 | IMUPWR | IMU 3.3VDC/5.0VDC power, output |
| 11 | IMUPWR | IMU 3.3VDC/5.0VDC power, output |
| 12 | IMUPWR | IMU 3.3VDC/5.0VDC power, output |
| 13 | GND | IMU ground, output |
| 14 | GND | IMU ground, output |
| 15 | GND | IMU ground, output |
| 16 | --- | not connected |
| 17 | --- | not connected |
| 18 | --- | not connected |
| 19 | --- | not connected |
| 20 | XDAC | connected to wire pad W10 |
| 21 | XADC | connected to wire pad W11 |
| 22 | --- | not connected |
| 23 | IMUPWR | IMU 3.3VDC/5.0VDC power, output |
| 24 | --- | not connected |
