SPRUJ74 January   2023

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Key Features
    2. 1.2 Thermal Compliance
    3. 1.3 EMC, EMI, and ESD Compliance
  3. 2QP-ENET Board Identification and Installation
    1. 2.1 QP-ENET Board Component Identification
    2. 2.2 Interfacing QP-ENET Expansion Board with J784S4XG01EVM Board
      1. 2.2.1 Detailed Board Assembly Procedure (J784S4XG01EVM)
  4. 3QP-ENET Expansion Board Hardware Architecture
    1. 3.1 QP-ENET Expansion Board Hardware Top Level Diagram
    2. 3.2 Expansion Connectors
    3. 3.3 Board ID EEPROM
    4. 3.4 Ethernet Interface
      1. 3.4.1 Quad Port SGMII PHY Default Configuration
      2. 3.4.2 SGMII Clocking Scheme
        1. 3.4.2.1 Main Clock
        2. 3.4.2.2 Optional Clock
      3. 3.4.3 Ethernet Port LED Indication
      4. 3.4.4 Reset and Power-down Signals
  5. 4Revision History
  6.   A Appendix
    1.     A.1 Appendix – I (Interface Mapping)
    2.     A.2 Appendix – II (QP-ENET Board GPIO Mapping)

3.2 Expansion Connectors

The J784S4XG01EVM board includes two Serial Ethernet Expansion connectors of 171446-1109 with 5-mm mating height, allowing the ENET expansion board (Quad-Port Ethernet Expansion) to be stacked on bottom side of the board.

This section provides an overview of the different interfaces and circuits on the Quad port Ethernet Expansion Board. The following table contains the Pin out/Signal mapping for the ENET Expansion connector.

Table 3-1 ENET Expansion Connector J3 Pinouts
PIN Net Name PIN Net Name
1 DGND 31 QSGMII_INTN
2 NC 32 DGND
3 NC 33 QSGMII4_TX_P
4 DGND 34 QSGMII4_TX_N
5 NC 35 DGND
6 NC 36 QSGMII4_RX_P
7 DGND 37 QSGMII4_RX_N
8 NC 38 DGND
9 NC 39 QSGMII_PHY_REFCLK_N
10 DGND 40 QSGMII_PHY_REFCLK_P
11 VSYS_IO_3V3 41 DGND
12 VSYS_IO_3V3 42 QSGMII_MDC
13 DGND 43 QSGMII_MDIO
14 EEPROM_A0 44 DGND
15 EEPROM_A1 45 QSGMII_RESETN
16 EEPROM_A2 46 CDCI_I2C_SEL
17 DGND 47 ENET_EXP_SPARE
18 EEPROM_WP 48 DGND
19 REFCLK_25MHZ 49 VSYS_5V0
20 DGND 50 VSYS_5V0
21 WKUP_I2C0_SCL 51 DGND
22 WKUP_I2C0_SDA 52 NC
23 DGND 53 NC
24 I2C0_SCL 54 DGND
25 I2C0_SDA 55 VCC_3V3
26 DGND 56 VCC_3V3
27 VCC_12V0 57 DGND
28 VCC_12V0 58 NC
29 DGND 59 NC
30 ENET_EXP_PWRDN 60 DGND
SH1 DGND SH2 DGND