SPRUIS4E March   2022  – January 2024

 

  1.   1
  2.   Jacinto7 J721E/DRA829/TDA4VM Evaluation Module (EVM)
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Key Features
    2. 1.2 Thermal Compliance
    3. 1.3 REACH Compliance
    4. 1.4 EMC, EMI, and ESD Compliance
  5. 2J721E EVM Overview
    1. 2.1 J721E EVM Board Identification
    2. 2.2 J721E SOM Component Identification
    3. 2.3 Jacinto7 Common Processor Components Identification
    4. 2.4 Quad Ethernet Components Identification
  6. 3EVM User Setup/Configuration
    1. 3.1 Power Requirements
    2. 3.2 Power ON Switch and Power LEDs
      1. 3.2.1 Over Voltage and Under Voltage Protection Circuit
      2. 3.2.2 Power Regulators and Power Status LEDs
    3. 3.3 EVM Reset/Interrupt Push Buttons
    4. 3.4 EVM DIP Switches
      1. 3.4.1 EVM Configuration DIP Switch
      2. 3.4.2 SOM Configuration DIP Switch
      3. 3.4.3 Boot Modes
      4. 3.4.4 Other Selection Switches
    5. 3.5 EVM UART/COM Port Mapping
    6. 3.6 JTAG Emulation
  7. 4J721E EVM Hardware Architecture
    1. 4.1  J721E EVM Hardware Top level Diagram
    2. 4.2  J721E EVM Interface Mapping
    3. 4.3  I2C Address Mapping
    4. 4.4  GPIO Mapping
    5. 4.5  Power Supply
      1. 4.5.1 Power Sequencing
      2. 4.5.2 Voltage Supervisor
      3. 4.5.3 DDR I/O Voltage Selection
        1. 4.5.3.1 J721E SoC S2R Logic Flow Diagram
        2. 4.5.3.2 J721E SoC MCU Only Operation
        3. 4.5.3.3 Power Monitoring
    6. 4.6  Reset
    7. 4.7  Clock
      1. 4.7.1 Processor’s Primary Clock
      2. 4.7.2 Processor’s Secondary/SERDES Ref Clock
      3. 4.7.3 EVM Peripheral Ref Clock
    8. 4.8  Memory Interfaces
      1. 4.8.1 LPDDR4 Interface
      2. 4.8.2 OSPI Interface
      3. 4.8.3 UFS Interface
      4. 4.8.4 MMC Interface
        1. 4.8.4.1 MMC0 - eMMC Interface
        2. 4.8.4.2 MMC1 – Micro SD Interface
      5. 4.8.5 Board ID EEPROM Interface
      6. 4.8.6 Boot EEPROM Interface
    9. 4.9  MCU Ethernet Interface
      1. 4.9.1 Gigabit Ethernet PHY Default Configuration
    10. 4.10 QSGMII Ethernet Interface
    11. 4.11 PCIe Interface
      1. 4.11.1 X1 Lane PCIe Interface
      2. 4.11.2 X2 Lane PCIe Interface
      3. 4.11.3 M.2 PCIe Interface
    12. 4.12 USB Interface
      1. 4.12.1 USB 3.1 Interface
      2. 4.12.2 USB 2.0 Interface
      3. 4.12.3 USB 3.0 Micro AB Interface (Reserved Port)
    13. 4.13 CAN Interface
    14. 4.14 FPD Interface (Audio Deserializer)
    15. 4.15 FPD Panel Interface (DSI Video Serializer)
    16. 4.16 Display Serial Interface (DSI) FPC
    17. 4.17 Audio Interface
    18. 4.18 Display Port Interface
    19. 4.19 MLB Interface
    20. 4.20 I3C Interface
    21. 4.21 ADC Interface
    22. 4.22 RTC Interface
    23. 4.23 Apple Authentication Header
    24. 4.24 EVM Expansion Connectors
    25. 4.25 ENET Expansion Connector
      1. 4.25.1 Power Requirements
      2. 4.25.2 Clock
        1. 4.25.2.1 Main Clock
        2. 4.25.2.2 Optional Clock
      3. 4.25.3 Reset Signals
      4. 4.25.4 Ethernet Interface
        1. 4.25.4.1 Quad Port SGMII PHY Default Configuration
      5. 4.25.5 Board ID EEPROM Interface
    26. 4.26 CSI Expansion Connector
  8. 5Revision History

4.25.3 Reset Signals

QSGMII_RESETz is a reset signal sourced from Common Processor board. This signal is used to reset the QSGMII PHY on the board.

QSGMII_RESETz is an AND output of SOC_PORz_out and ENET_EXP_RSTz . The ENET_EXP_RSTz signal is asserted by an I2C GPIO Expander2 (I2C ADD# 0x22, I2C0) Port21 in the common processor board.

Table 4-32 lists the ENET expansion connector pinouts.

Table 4-32 ENET Expansion Connector J10 Pinout
ENET Expansion connector Interface J10
Pin No Signal
1 DGND
2 NC
3 NC
4 DGND
5 NC
6 NC
7 DGND
8 NC
9 NC
10 DGND
11 VSYS_IO_3V3
12 VSYS_IO_3V3
13 DGND
14 EEPROM_A0
15 EEPROM_A1
16 EEPROM_A2
17 DGND
18 EEPROM_WP
19 REFCLK_25MHZ
20 DGND
21 WKUP_I2C0_SCL
22 WKUP_I2C0_SDA
23 DGND
24 I2C0_SCL
25 I2C0_SDA
26 DGND
27 VCC_12V0
28 VCC_12V0
29 DGND
30 ENET_EXP_PWRDN
31 QSGMII_INTN
32 DGND
33 QSGMII4_TX_P
34 QSGMII4_TX_N
35 DGND
36 QSGMII4_RX_P
37 QSGMII4_RX_N
38 DGND
39 QSGMII_PHY_REFCLK_N
40 QSGMII_PHY_REFCLK_P
41 DGND
42 QSGMII_MDC
43 QSGMII_MDIO
44 DGND
45 QSGMII_RESETN
46 CDCI_I2C_SEL
47 ENET_EXP_SPARE
48 DGND
49 VSYS_5V0
50 VSYS_5V0
51 DGND
52 NC
53 NC
54 DGND
55 VCC_3V3
56 VCC_3V3
57 DGND
58 NC
59 NC
60 DGND
SH1 DGND
SH2 DGND