SPRUJF7 March   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
      1.      Preface: Read This First
      2. 1.1.1 Sitara MCU+ Academy
      3. 1.1.2 Important Usage Notes
    2. 1.2 Kit Contents
    3. 1.3 Specification
      1. 1.3.1 Component Identification
      2. 1.3.2 Functional Block Diagram
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1  Additional Images
    2. 2.2  Setup
    3. 2.3  Power Requirements
      1. 2.3.1 Power Tree
      2. 2.3.2 Power Sequence
    4. 2.4  Header Information
      1. 2.4.1 Baseboard Headers (J1, J2, J3)
      2. 2.4.2 HSEC Pinout
      3. 2.4.3 XDS Debug Header (J4)
      4. 2.4.4 FSI Header
      5. 2.4.5 OSPI Expansion Connector
      6. 2.4.6 Ethernet Add-on Board Connector
    5. 2.5  Reset
    6. 2.6  Clock
    7. 2.7  GPIO Mapping
    8. 2.8  Interfaces
      1. 2.8.1 USB
      2. 2.8.2 UART
      3. 2.8.3 FSI
      4. 2.8.4 OSPI
      5. 2.8.5 Ethernet
        1. 2.8.5.1 RGMII
        2. 2.8.5.2 PRU-ICSS
          1. 2.8.5.2.1 On-Board PHY
          2. 2.8.5.2.2 Ethernet Add-on Board
      6. 2.8.6 I2C
      7. 2.8.7 SPI
      8. 2.8.8 TMDSHSECDOCK-AM263 Peripherals
        1. 2.8.8.1 ADC/DAC
        2. 2.8.8.2 MCAN
        3. 2.8.8.3 LIN1
        4. 2.8.8.4 JTAG
        5. 2.8.8.5 GPIO
    9. 2.9  Debug Information
    10. 2.10 Test Points
    11. 2.11 Assembly Instructions
    12. 2.12 Best Practices
  8. 3Software
  9. 4Hardware Design Files
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6References
    1. 6.1 Other TI Components Used in This Design
  12. 7Revision History
2.8.5.2.2 Ethernet Add-on Board

There is one Ethernet Add-on Board Connector on the HSEC180ADAPEVM-AM2 for connecting compatible TI Ethernet Add-on Boards. The primary Ethernet Add-on Board for this EVM system is the DP83826-EVM-AM2. Visit the tool page for more information.

To connect the HSEC180ADAPEVM-AM2 to the Ethernet add-on board, attach the receptacle on the bottom side of the add-on board to J6 on the HSEC180ADAPEVM-AM2. Use the screws and spacers included in the Ethernet add-on board kit to securely mount the two boards together. The connected board assembly is shown in Figure 2-21.

HSEC180ADAPEVM-AM2 HSEC180ADAPEVM-AM2 + Ethernet Add-on Board Connection Figure 2-21 HSEC180ADAPEVM-AM2 + Ethernet Add-on Board Connection

The AM261x PR0_PRU1 core is connected to the Ethernet Add-on Board Connector. The full pinout details of the connector can be found in Section 2.4.6. The hardware connections between the AM261x controlSOM + HSEC180ADAPEVM-AM2 system and the connector are shown in Figure 2-22 and detailed in Table 2-17 below:

HSEC180ADAPEVM-AM2 HSEC180ADAPEVM-AM2 Ethernet Add-on Board Interface Figure 2-22 HSEC180ADAPEVM-AM2 Ethernet Add-on Board Interface

Table 2-17 Ethernet Add-on Board Hardware Connections
Ethernet Add-on Board Pin AM261x / controlSOM Pin Source HSEC180ADAPEVM Net Notes
RX_D[0:3] PR0_PRU1_GPIO[0:3] ICSSM_MII1_RXD[0:3]
RXDV PR0_PRU1_GPIO4 ICSSM_MII1_RX_DV
RX_ER PR0_PRU1_GPIO5 ICSSM_MII1_RXER
RX_CLK PR0_PRU1_GPIO6 ICSSM_MII1_RXCLK
RX_LINK PR0_PRU1_GPIO8 ICSSM_MII1_RXLINK
TXEN PR0_PRU1_GPIO15 ICSSM_MII1_TXEN
TX_CLK PR0_PRU1_GPIO16 ICSSM_MII1_TXCLK
TX_D[0:3] PR0_PRU1_GPIO[11:14] ICSSM_MII1_TXD[0:3]
MDC PR0_MDIO0_MDC PR0_MDIO0_MDC
MDIO PR0_MDIO0_MDIO PR0_MDIO0_MDIO
INT_N GPIO119 MII1_INTn
REF_CLK PHY1_25MHZ_CLK PHY1_25MHZ_CLK Output of Clock Buffer IC on AM261x controlSOM
RESET_N Output of MII_RST# AND PORz MII0/MII1_RST MII_RST# net sourced from IO Expander on AM261x controlSOM
The I2C address of the Ethernet Add-on Board EEPROM is determined by on-board pull resistors that connect to the address pins of an EEPROM on a Ethernet Add-on Board when connected to the HSEC180ADAPEVM-AM2. These address pins also drive a FET network on the Ethernet Add-on Board that determine the PHY's address. All Ethernet add-on boards in the TI Ethernet Add-on Board Ecosystem follow the same addressing convention. Because the HSEC180ADAPEVM-AM2 only has a single connector, the CONNECTOR_0 addressing is followed:

Table 2-18 CONNECTOR_0 I2C / PHY Addressing Scheme
Connector_# EEPROM_A2 (connector pin 37) EEPROM_A1 EEPROM_A0 (connector pin 47) I2C Address PHY Address
Pull A2 Pull A1 Pull A0
CONNECTOR_0 GND 0 VDDIO 1 GND 0 0x52 Ethernet add-on board dependent
The PHY address is dependent on which Ethernet add-on board is being used, since different PHYs have different address configurations. To determine the PHY address for a specific Ethernet Add-on Board, see the Add-on Board's User Guide and find the Multi-Connector Addressing section in the document.