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The goal of this thread is to help engineers differentiate between the SK-TDA4VM evaluation board and the J721E EVM (Evaluation Module).
After reading this FAQ you could answer the following questions:
What SDKs are supported in each EVM?
What are the hardware differences between the SK-TDA4VM and the J721E EVM?
What is the difference in I2C address mapping?
Software
The PROCESSOR-SDK-LINUX-SK-TDA4VM (a.k.a. Edge AI SDK) is an SDK for the low-cost board named as SK-TDA4VM. Compared to the other SDKs that run on J721E EVM and are tailored for automotive applications, the Edge AI SDK and SK-TDA4VM is tailored for rapid prototyping of industrial edge AI applications.
More details such as driver differences for the SDK differences are documented in the Edge AI SDK: https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-sk-tda4vm/08_01_00_02/exports/docs/faq.html
The following table shows which SDK is currently supported on TDA4VM Starter Kit vs J721E EVM:
|
Software |
Description |
SK-TDA4VM |
J721EXSOMXEVM + J721EXCPXEVM |
|---|---|---|---|
PROCESSOR-SDK-LINUX-J721E |
Linux SDK for DRA829 & TDA4VM Jacinto
|
x |
|
PROCESSOR-SDK-LINUX-SK-TDA4VM |
Linux SDK for edge AI applications on TDA4VM Jacinto
|
x |
|
PROCESSOR-SDK-LINUX-RT-J721E |
Linux-RT SDK for DRA829 & TDA4VM Jacinto
|
x |
|
PROCESSOR-SDK-QNX-J721E |
QNX SDK for DRA829 & TDA4VM Jacinto
|
x |
|
PROCESSOR-SDK-RTOS-J721E |
RTOS SDK for DRA829 & TDA4VM Jacinto
|
x |
Hardware
Differences are highlighted in red.
Note: The J721E EVM is comprised of:
• J721E System On Module (SOM) board
• Jacinto7 Common Processor Board (CPB)
• Quad-Port Ethernet board (QPENet)
| SK-TDA4VM | J721E EVM | |
|---|---|---|
| Processor | TDA4VM Processor, 24 mm x 24 mm, 0.8 mm pitch, 827‐pin FCBGA | TDA4VM Processor, 24 mm x 24 mm, 0.8 mm pitch, 827‐pin FCBGA |
| Memory | – 4GByte LPDDR4 DRAM (3733 MHz) – 512 Mb Non-Volatile Flash, Octal‐SPI NOR – Multimedia Card (MMC)/Secure Digital Card (Micro SD) Cage, UHS‐I |
– 4GByte LPDDR4 DRAM (3733 MHz), support inline ECC – 2x Octal‐SPI NOR flash, 512 Mb memory (8 bit) + 512 Mb memory (4 bit) – HyperFlash + HyerRAM, 512 Mb flash memory + 256 Mb RAM – UFS Flash memory, 32GByte, 2Lane, Gear3 – eMMC Flash memory, 16 GB memory, v5.1 compliant – MicroSD Card Cage, UHS‐I – Inter-Integrated Circuit (I2C) EEPROM, 1 Mbit |
| Display | – VESA Display Port (v1.4), supports 4K UHD with MST support – DVI (v1.0) via HDMI Type A, supports 1080p |
– 1x Display Port, up to 4K resolution with MST support |
| Connectivity | – USB3.1 (Gen1) Hub to 3x Type A (Host) – USB3.1 (Gen1) Type C (DFP and UFP modes) – USB2.0 Micro B (for Quad UART-over-USB Transceiver) – Gigabit Ethernet (RJ45 Connector) – 4x CAN-FD Headers (1x3) – 2x 15-Pin Flex Cable Interface (CSI-2L) – 40-pin High Speed Connector (dual CSI-4L, I2C, GPIO, and so forth ) |
– 4x CAN Interfaces, full CAN‐FD support – 1x USB3.1 Type C Interface, support DFP, DRP, UFP modes – 4x USB2.0 Host Interfaces (2x for external cables) – 1x FPD‐Link Panel Interface, Gen3 – 1x Audio Codec (PCM3168A), supports 2x Line Inputs, 4x Microphone Inputs, 2x Line Outputs, 6x Headphone Outputs – 1x FPD‐Link Radio Tuner Interface – 5x Gbit Ethernet, 1x RGMII/DP83867 + 1x QSGMII/VSC8514 – 6x Universal Asynchronous Receiver/Transmitter (UART) terminals via 2x USB FTDI (UART‐over‐USB) – 2x I3C headers – 1x ADC Header |
| Expansion | – M.2 Key E Interface (PCIe/Gen3 x 1 Lane, USB2.0, SDIO, I2S, UART, I2C) – M.2 Key M Interface (PCIe/Gen3 x 2 Lane) – 40-pin Header (2x20) (I2C, SPI, UART, I2S, GPIO, PWM, and so forth) – Fan Header (5 V) |
– 2x PCIe Card Slot, 1x PCIe M.2 Slot (M‐Key), all Gen3 – MLB, MLBP Expansion Interface – Image/Video Capture Expansion Interface – Apple Authentication Module Interface – General Expansion Interface |
| JTAG/Emulator | – External JTAG/Emulator Support (20-pin Header) | – Integrated XDS110 Emulator support – External emulator through 60pin MIPI Connector – Trace Support through 60pin MIPI Connector – Includes adapters for 14pin and 20pin CTI |
| Power |
Recommended external Power supply (USB-C connector) –GlobTek, Inc. TR9CZ3000USBCG2R6BF2 –Qualtek QADC-65-20-08CB Optimized Power Management Solution |
Power Supply: 12 V DC nominal input (6 V‐28 V input range) – Optimized Power Management Solution for Processor – Integrated Power Measurement |
| Compliance | – REACH and RoHS Compliant – EMI/EMC Radiation Compliant |
– REACH and RoHS Compliant |
For more information see the corresponding user guides:
SK-TDA4VM User Guide
J721E EVM User Guide
I2C address mapping
| SK/EVM | Device/Function | Part# | I2C Address |
| WKUP_I2C0 Port | |||
| SK-TDA4VM | PMIC | PTPS65941213 | 0x48-4B |
| PMIC | PTPS65941111 | 0x4C-4F | |
| Board ID EEPROM | AT24C512C | 0x51 | |
| Expansion Header (40p) | Add-on | ||
| J721E EVM | PMIC | O917A131TRGZTQ1 | 0x58-5B |
| PMIC | LP873200RHDTQ1 | 0x62 | |
| PMIC | LP87524BRNFTQ1 | 0x60 | |
| PMIC | LP87561IRNFTQ1 | 0x61 | |
| Board ID EEPROM | CAT24C256W | 0x50 | |
| Board ID EEPROM | CAT24C256W | 0x53 | |
| Board ID EEPROM | CAT24C256W | 0x54 | |
| MCU_I2C0 Port | |||
| SK-TDA4VM | PMIC | PTPS65941213 | 0x12 |
| J721E EVM | BOOT EEPROM | AT24CM01 | 0x50,51 |
| Temperature Sensors 1 | TMP100NA/3K | 0x48 | |
| Temperature Sensors 2 | TMP100NA/3K | 0x49 | |
| SoC_I2C0 Port | |||
| SK-TDA4VM | Input PD Controller | TPS25750 | 0x20 |
| PCIe M.2 Key E/M | TCA9543A | 0x71, Add-on | |
| J721E EVM | Peripheral Clock Generator | CDCEL937-Q1 | 0x6D |
| RTC Module | MCP79410 | 0x57,6F | |
| Apple Authentication Header/Footprint | 2214BR‐10G | 0x10, 0x11 | |
| SERDES REF CLK GEN - 2 | CDCI6214 | 0x76 | |
| 16 bit I2C GPIO Expander-1 | TCA6416ARTWR | 0x20 | |
| 24 bit I2C GPIO Expander-2 | TCA6424ARGJR | 0x21 | |
| I2C MUX for both x2LANE and x1LANE PCIe Interface | TCA9543APWR | 0x70 | |
| I2C MUX for M.2 PCIe Connector (2 L PCIe Gen4-SERDES2) | TCA9543APWR | 0x71 | |
| MLB Physical Interface Board | <connector interface> | ||
| Clock Generator on Quad ENET Board | CDCI6214 | TBD | |
| SoC_I2C1 Port | |||
| SK-TDA4VM | HDMI DDC | Add-on | |
| J721E EVM | 8 bit I2C GPIO Expander-4 | TCA6408ARGTR | 0x20 |
| FPD Link-IV Serializer (DSI) | DS90UH981-Q1 | 0x0E | |
| DSI FPC | CONNECTOR INTERFACE | TBD | |
| Current Monitors 1(PM1_I2C) | INA226 | 0x40-0x4F | |
| Current Monitors 2(PM2_I2C) | INA226 | 0x40-0x4F | |
| Test Automation Header | <connector interface> | ||
| SoC_I2C3 Port | |||
| SK-TDA4VM | Camera Expansion | TCA9543A | 0x70, Add-on |
| J721E EVM | 8 bit I2C GPIO Expander-3 | TCA6408ARGTR | 0x20 |
| Audio Codec - 1 | PCM3168A-Q1 | 0x44 | |
| FPD Link-III De-serializer (McASP) | DS90UB926Q-Q1 | 0x2C | |
| SoC_I2C5 Port | |||
| SK-TDA4VM | Expansion Header (40p) | Add-On | |
| SoC_I2C6 Port | |||
| J721E EVM | 8 bit I2C GPIO Expander-5 | TCA6408ARGTR | 0x20 |
For more information see the corresponding user guides:
SK-TDA4VM User Guide
J721E EVM User Guide
