3. GMSL2-10GbE Conversion Module Hardware Reference Manual#

3.1. Overview#

The GMSL2-10GbE conversion module is an edge compute platform enabling low-latency data transfer from up to eight Gigabit Multimedia Serial Link™ (GMSL) interfaces to a host system via a 10Gb Ethernet link.

The system includes two MAX96724 Quad Tunneling GMSL2/1 to CSI-2 Deserializers, enabling connectivity of up to eight GMSL cameras. The video data from the cameras is fed via the MAX96724 MIPI-CSI2 interfaces to an AMD KV26 System-on-Module which implements the logic to aggregate the video data into a 10Gb Ethernet link to be sent to a central processing unit.

The IEEE1588 Precision Time Protocol (PTP) with hardware timestamping is supported, enabling accurate synchronization with host systems and other edge devices. The AD9545 Dual DPLL/IEEE1588, 1pps Synchronizer and Jitter Cleaner is used to generate the required clocks for the 10Gb Ethernet interface and the PTP logic.

16 general purpose I/O pins are available with software configurable functionality, operating at 3.3V voltage level.

A RS232 dedicated interface can be used to connect UART peripherals such as GNSS devices.

3.2. Mechanical specifications#

../_images/GMSL2-10GbE-hw_ref_mechanical_drawing.jpg

Fig. 3.12 Mechanical drawings#

3.3. Power and thermal#

Parameter

Min

Typ

Max

Unit

Comments

Supply voltage

10

12

48

V

Main power connector combined with I/O connector. 1 x Barrel jack power connector, can be used for main power or for the auxiliary power

Power rating

5

24

W

Depends on system processing load

Operating temperature

-40

60

degC

Measured at carrier PCB level. Proper cooling must be implemented to ensure operating temperature range

3.4. Input / Output interface#

3.4.1. SFP+ Optical 10Gb Ethernet#

  • 10Gb Ethernet MAC & PHY in FPGA

  • IEEE 1588 with hardware timestamping

  • SFP+ cage P/N : 2007194-1

  • SFP+ connector P/N : 1888247-1

3.4.2. UART (RS232)#

3.3V voltage level with current limit and overvoltage protection.

Functionalities:

  • Camera trigger / Flash signal x8

  • PPS output x1

  • PPS input x1

  • PWM output x1

  • I2C Connector P/N: 430452023

3.4.3. GPIO#

16 port, 3.3V voltage level with current limit and overvoltage protection Functionalities.

  • Camera trigger / Flash signal x8

  • PPS output x1

  • PPS input x1

  • PWM output x1

  • I2C

Connector P/N: 430452023

3.4.4. GMSL#

  • 2 x HFM quad type mini-Fakra connector

  • Conector P/N: 2304168-9

3.4.5. SD Card#

  • Micro SD card holder, push to eject

3.4.6. USB2.0#

  • Console interface for Linux OS

3.4.7. JTAG#

  • Kria SoC PL Debug interface

3.5. Processing#

3.5.1. AMD Kria K26 SoM#

Industrial grade SoM (P/N: SM-K26-XCL2GI). Cooling solution not included

3.6. Firmware & Software#

3.6.1. Firmware#

  • Custom Linux image without desktop UI

  • Linux image update over Ethernet

  • Linux image stored in the Xilinx Kria SoM eMMC or on SD card

3.6.2. HTML User interface for system configuration and status#

  • Accessible over configurable IP address and port

  • Provides remote control for system configuration and status

    • RTP Control

    • Camera Trigger Settings

    • Streaming Settings

    • PTP Settings

    • Camera Settings

3.6.3. Remote system configuration and status via ssh#

  • ssh access into the system via the Ethernet interface

  • Provides access to all the system’s functions via the Linux standard drivers interfaces and tools

3.7. Synchronization#

3.7.1. IEEE1588#

  • Hardware timestamping

  • Configurable as slave or master

3.8. Camera control & data format#

3.8.1. Camera trigger control#

  • Each camera independently triggerable internally.

    • Using FSYNC + GPIO of deserializers for independent triggering of all four cameras on one deserializer

  • Internal triggering relative to system ToS

    • Each internal trigger configurable for frequency, phase, and duty cycle: 1Hz to 200Hz

  • External GPIO configured as output can be controlled in the same way as internal camera triggers

  • External GPIO configured as input can trigger the individual cameras directly

  • Trigger jitter at sub ms level

  • Trigger delay can also be configured (phase setting + delay to compensate for different camera triggering and exposure peculiarities)

3.8.2. Data timestamping#

  • Video packets packets timestamped with PTP-synchronized system time. Timestamp format options:

    • 32bit NTP

    • 96bit PTP

  • Images timestamps generated at trigger (FSYNC), end of frame or start of frame, using FPGA timestamping (PTP -synchronized system time)

  • Configurable timestamp offset

3.8.3. Video data format#

  • UDP data output

  • RTP compliant as per RFC3550 & RFC4175