4. A Tour of the SerDes Hardware
Before learning how to configure and set up the device, let’s examine the device from all sides to understand all of its interfaces and status indicators.
4.1. Block Diagram
4.2. Label and Status Indicators
4.2.1. LED Indicators
Status LEDs are located on the top of the device and provide indicators of the SerDes link, errors, and power state.
Membrane Status LEDs
| LED | Description |
|---|---|
| PWR | Power Enabled when the device has power. This will be enabled with either PoC or external power supply. |
| PoC PWR | PoC Power Enabled when power-over-coax is present. |
| Lock | GMSL2 Lock status Reflects GMSL2 LOCK pin. Configured via register on MAX9295/MAX9296. |
| Error | GMSL2 Error status Reflects GMSL2 ERRB pin. Configured via register on MAX9295/MAX9296. |
Note
On revision 1.0 hardware, the MAX9295 serializers utilize the LOCK/ERRB pin on MFP3. On revision 2.0+ hardware, the MAX9295 serializers utilize the ERRB pin on MFP3 and the LOCK(alt) pin on MFP7.
4.3. Connector Interfaces
Note
Dip Switches, Fakra video Port 1 and Video Port 0 (outside most port)
Note
Fakra video Port 0 (outside most port) and Video Port 1, I2C Connector, 2pin DC Power
4.3.1. External 3.3V I2C Bus Header
Although I2C access is available over the SerDes link, an external header is provided to allow connection of an additional 3.3V I2C master. All internal SerDes chips can be accessed using this header for configuration or status monitoring. Register descriptions and control information can be found in the SerDes part datasheets. This interface should be compatible with any I2C controller or adapter that operates at 3.3V.
Note
This header is compatible with the TI USB2ANY adapter using the Analog Launchpad software, and also the Teensy uC using the Maxim GMSL GUI. For more information, see the adapter documentation.
4.3.2. Coax Ports: FAKRA
Two input coax ports are available that connect to a single GMSL2 deserializer. Two output coax ports are available that connect to 2 separate GMSL2 serializers.
4.3.3. External Power Supply: 6-40V:
Note: Power can be supplied in two ways:
By external 2 pin to barrel jack connector
Customer controller deserializer is able to supply power to RAD-Phobos, depending on the customer controller power circuit it should be able to power two cameras as well.
Note: Port0 is the only port that will accept PoC power from the customer controller Deserializer, to power up either cameras and RAD-Phobos
4.3.4. Dip Switch Configuration
External switches are available to set various configuration parameters for the SerDes chips. The switches can be used to select between multiple options for the I2C addresses and SerDes link modes. Switches are ON when toggled down, and OFF when toggled up.
Configuration values are captured at power up, but can generally be changed later using I2C registers on the SerDes chip. For more information, see the SerDes part documentation.
| Switch | Description |
|---|---|
| 1 | GMSL2 Serializers I2C Address (CFG0 pin) SW1=OFF (0x80/0x84) Script 7-bit (0x40/0x42) SW1=ON (0xC0/0xC4) Script 7-bit (0x60/0x62) |
| 2/3 | GMSL2 Serializers Mode (CFG1 pin) SW2/SW3=OFF/ON (GMSL2 6Gbps) SW2/SW3=ON/OFF (GMSL2 3Gbps) SW2/SW3=ON/ON (GMSL1 HIM) |
| 4 | GMSL2 Deserializer I2C Address (CFG0 pin) SW4=OFF (0x90) Script 7-bit (0x48) SW4=ON (0xD8) Script 7-bit (0x6C) |
| 5/6 | GMSL2 Deserializer Mode (CFG1 pin) SW5/SW6=OFF/ON (GMSL2 6Gbps) SW5/SW6=ON/OFF (GMSL2 3Gbps) SW5/SW6=ON/ON (GMSL1 HIM) |
| 7 | Power-over-coax Output Enable Enable PoC output on deserializer coax ports. |
4.4. Mapped GPIO
GPIO signals are internally mapped between the SerDes parts to allow control and status signals to propagate along the link. Examples of signals include frame sync or sensor resets. Use of the GPIO must be configured properly in the SerDes parts. For more information, see the SerDes part documentation.
4.4.1. Hardware revision 1.0
| MAX9296 | MAX9295 (0) |
|---|---|
| MFP5 | MFP8 |
| MFP0 | MFP7 |
| MFP7 | MFP5 |
| MFP8 | MFP6 |
| MAX9296 | MAX9295 (1) |
|---|---|
| MFP4 | MFP4 |
| MFP9 | MFP5 |
| MFP10 | MFP6 |
4.4.2. Hardware revision 2.0
| MAX9296 | MAX9295 (0) |
|---|---|
| MFP5 | MFP4 |
| MFP0 | MFP8 |
| MFP7 | MFP0 |
| MFP8 | MFP6 |
| MAX9296 | MAX9295 (1) |
|---|---|
| MFP6 | MFP4 |
| MFP9 | MFP8 |
| MFP10 | MFP0 |
4.5. Mechanical
Dimensions: 2.5” wide x 1.25” thickness x 4.375” length (with rubber boots, Fakra to Fakra)
Dimensions: 2.25” wide x 1” thickness x 4..375” length (without rubber boots, Fakra to Fakra)
Weight: 1.0 Lbs