7. EVM Setup for J784S4

This section is intended to give a quick reference of EVM related to SDK usage. Full EVM documentation will be referenced at TDA4AP, TDA4VP, TDA4AH, TDA4VH EVM at a later time.

Important

• The power supply requires an output voltage of 24-48 VDC, and output capacity of 100-160W, depending on use case and connected peripherals.

• When connecting the fusion daughter card, the power cable connecting processor board and fusion board should look exactly like the picture in section 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	Fusion 1 card	IMX390+UB953 FPDLink sensors	QPENet card
eDP (DisplayPort) display (1)	na	na	na
HDMI display (2)	na	na	na
CSI2RX camera input	REQURIED	REQURIED	na
CPSW9G (ETHFW) demos	na	na	REQUIRED
CAN demos (1)	na	na	na

(1) Supported on base EVM board

(2) Supported on base EVM board along with external DP to HDMI adapter

7.1.2. UART terminal setup

• Connect USB cable to Main UART port on EVM (see EVM)

  • 4 UART ports would be visible at the PC side

  • Port 0 from this is used this for Linux, RTOS UART terminal from A72

• Setup UART for 115200 baud rate, 8 data bits, no party, 1 stop bit

7.1.3. Boot Modes

Bootmodes are selected using the SW11 and SW7 switches on the EVM.

7.1.3.1. No Boot Mode

When you want the binaries to be loaded from a debugger (CCS), the EVM has to be set in the NO boot mode.

Following are the switch settings to do the same.:

SW11[1-8] = 1000 1000
SW7[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 EVM.:

SW11[1-8] = 1000 0010
SW7[1-8]  = 0000 0000

Fig. 7.2 MMC/SD Boot Mode

7.1.3.3. XSPI Boot Mode

Following are the switch settings to set the boot mode to XSPI for EVM.:

SW2[1-8]  = 0xxx xxxx
SW11[1-8] = 0000 1010
SW7[1-8]  = 0110 0000

Fig. 7.3 XSPI Boot Mode SW2

Fig. 7.4 XSPI Boot Mode SW11 and SW7

7.1.3.4. UART Boot Mode

Following are the switch settings to set the boot mode to UART for EVM.:

SW2[1-8]  = 0xxx xxxx
SW11[1-8] = 0000 0000
SW7[1-8]  = 0111 0000

Fig. 7.5 UART Boot Mode SW2

Fig. 7.6 UART Boot Mode SW11 and SW7

7.2. EVM and Daughter Card information

7.2.1. EVM

Whereas other J7 family boards consist of a Common Processor Board plus SOM, the J784S4 Evaluation Module (EVM) has these two components combined into a single board. The J784S4 EVM is the main board which includes the following:

• J784S4 SoC

• Leo PMIC (Power controller)

• 32 (4x8) GiB LPDDR4 RAM

• XSPI NOR flash

In addition, the J784S4 EVM has peripherals to provide most common functionality. It has expander ports to connect to different adapter cards.

Fig. 7.7 J784S4 EVM

Contents of the board

1. 4xUART to USB port for Main uarts

   • Port0 from this is used this for Linux, RTOS UART terminal from A72

2. 2xUART to USB port MCU domain uarts

   • Port0 from this is used for Cortex M4F UART

   • Port1 from this is used for MCU R5F UART

3. 6x CAN FD Interfaces

4. Main Domain Ethernet (CPSW2G) port

5. MCU Domain Ethernet (CPSW2G) port

6. MIPI JTAG connector

7. SD card slot

8. XDS110 on board USB JTAG connector

9. USB Host ports

10. Quad Port Ethernet daughter card (bottom of EVM) sold separately

11. 2x Display (eDP/DP) ports

    • Display0 is used by software for eDP/DP output

12. USBC port

13. 12V Power input

14. Power switch

7.2.2. Quad Port Ethernet daughter card

Quad Port Ethernet (QPENet) board is an adapter board which offers additional CPSW9G Ethernet port capabilities to the Jacinto7 EVM. It is connected to the bottom of the EVM beneath the 2x Display (eDP/DP) ports.

Fig. 7.8 QPENet daughter card

7.2.3. Fusion daughter card

Fusion daughter card is adapter board to connect 8 camera sensors (IMX390+UB953 serializer) through de-serializer (UB960) available on the Fusion1 daughter card to CSI2RX ports of J784S4 SoC.

Connect the daughter card to bottom side of EVM at connector J57.

Fig. 7.9 CSI2 Exp Connector

Fig. 7.10 Fusion1 Board

Fig. 7.11 Fusion1 Mounting