7. EVM Setup for J721e¶
Important
- The power supply current requires more than 1A @12V input
- DisplayPort-to-DVI or DisplayPort-to-HDMI adapters don’t work with DisplayPort
- The SOM board has to be tightly inserted into the connector sockets.
- When connecting the fusion duaghter card, the power cable connecting processor board and fusion board should look exactly like the picture in section ref fusion-daughter-card. (P.S. The same cable from TDA2P EVM has the opposite wire connection at one end)
7.1. EVM Setup to run SDK demos¶
7.1.1. Daughter card requirements¶
Below table shows the daughter cards required for various features/demos
| Feature | Infotainment card | Fusion 1 card | IMX390+UB953 FPDLink sensors | GESI card |
|---|---|---|---|---|
| HDMI display | REQUIRED | na | na | na |
| eDP (DisplayPort)display | na | na | na | na |
| CSI2RX camera input | na | REQURIED | REQURIED | na |
| CPSW9G (ETHFW) demos | na | na | na | REQUIRED |
7.1.2. UART terminal setup¶
- Connect USB cable to Main UART port on common processor board (see ref common-proc-board)
- 4 UART ports would be visible at the PC side
- Port 0 from this is used this for QNX, RTOS UART terminal from A72
- If you use the SBL bootflow, it would be helpful to connect to the MCU UART port on the common processor board as well. The second COM port from the MCU UART gives you logs from the MCU R5F from which the boot app will be run.
- Setup UART for 115200 baud rate, 8 data bits, no parity, 1 stop bit
7.1.3. Boot Modes¶
Bootmodes are selected using the SW8 and SW9 switches on the common processor board.
7.1.3.1. No Boot Mode¶
When you want the binaries to be loaded from a debugger (CCS), the common processor boards has to be set in the NO boot mode.
Following are the switch settings to do the same.:
SW8[1-8] = 1000 1000
SW9[1-8] = 0111 0000
Fig. 7.1 No Boot Mode
7.1.3.2. SD Boot Mode¶
Following are the switch settings to set the boot mode to SD for common processor board.:
SW8[1-8] = 1000 0010
SW9[1-8] = 0000 0000
Fig. 7.2 MMC/SD Boot Mode
7.1.3.3. OSPI Boot Mode¶
Following are the switch settings to set the boot mode to OSPI for common processor board.:
SW8[1-8] = 0000 0000
SW9[1-8] = 0100 0000
Fig. 7.3 OSPI Boot Mode
7.1.3.4. UART Boot Mode¶
Following are the switch settings to set the boot mode to SD for common processor board.:
SW8[1-8] = 0000 0000
SW9[1-8] = 0111 0000
Fig. 7.4 UART Boot Mode
7.2. EVM and Daughter Card information¶
7.2.1. J721e SOM¶
The J721E Evaluation Module consists of a SOM (System on Module), shown in the red box below, fitted to a common processor board or base EVM.
Fig. 7.5 J721e SOM
Contents of the common processor board
- J721e SoC
- Power controller
- 4 GiB DDR RAM
- OSPI NOR flash
- Hyperflash
7.2.2. Common Processor Board¶
Common Processor Board is the main board which has peripherals to provide most common functionality. It has expander ports to connect to different adapter cards.
Fig. 7.6 J721e Common Processor Board
Contents of the board
- 4xUART to USB port for Main uarts
- Port0 from this is used this for Linux, RTOS UART terminal from A72
- 2xUART to USB port MCU domain uarts
- Port0 from this is used for DMSC UART
- Port1 from this is used for MCU R5F UART
- 2x Display (eDP/DP) ports
- Display0 is used by software for eDP/DP output
- Ethernet (CPSW2G) port
- SD card slot
- XDS110 on board USB JTAG connector
- USB ports
- 12V Power input
- Power switch
- MIPI JTAG connector
7.2.3. Infotainment daughter card¶
Infotainment daughter card is adapter board which has additional peripherals for infotainment use cases. This has support for HDMI display, FPDlink display extra audio channels.
Fig. 7.7 Infotainment daughter card
Contents of the board
- HDMI display connector
- 2x FPDlink display connectors
- 14x 3.5mm audio jacks
- Parallel port Omnivision camera connector (direct connection, i.e no FPDLink)
- CSI camera connector (direct connection, i.e no FPDLink)
7.2.4. GESI daughter card¶
GESI(Gateway/Ethernet Switch/Industrial) daughter card is an adapter board which has additional peripherals for gateway and industrial use cases. This has support for extra ethernet ports and CAN ports.
Fig. 7.8 GESI daughter card
Contents of the board
- 5x ethernet ports
- Profinet connector
- Motor control headers
- Additional CAN Transceivers/ headers
7.2.5. Fusion daughter card¶
Fusion daughter card is adapter board to connect 4 camera sensors (IMX390+UB953 serializer) through de-serializer (UB960) available on the Fusion1 daughter card to CSI2RX ports of J721e SoC.
Connect the daughter card to common processor board at “CSI2 Exp” connector J25.
Fig. 7.9 CSI2 Exp Connector
Fig. 7.10 Fusion1 Board
Fig. 7.11 Fusion1 Camera Setup