Texas Instruments J721EXENETXPANEVM User manual

User’s Guide
Jacinto7 EVM Quad Port Ethernet Expansion Board
User’s Guide
Table of Contents
1 Introduction.............................................................................................................................................................................2
1.1 Key Features......................................................................................................................................................................2
1.2 Thermal Compliance.......................................................................................................................................................... 2
1.3 EMC, EMI, and ESD Compliance...................................................................................................................................... 2
2 QP-ENET Board Identification and Installation....................................................................................................................3
2.1 QP-ENET Board Component Identification........................................................................................................................3
2.2 Interfacing QP-ENET Expansion Board with J784S4XG01EVM Board.............................................................................4
3 QP-ENET Expansion Board Hardware Architecture............................................................................................................9
3.1 QP-ENET Expansion Board Hardware Top Level Diagram............................................................................................... 9
3.2 Expansion Connectors....................................................................................................................................................... 9
3.3 Board ID EEPROM.......................................................................................................................................................... 10
3.4 Ethernet Interface.............................................................................................................................................................11
4 Revision History................................................................................................................................................................... 14
A Appendix...............................................................................................................................................................................15
A.1 Appendix – I (Interface Mapping).....................................................................................................................................15
A.2 Appendix – II (QP-ENET Board GPIO Mapping)............................................................................................................. 15
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1 Introduction
The Jacinto7 EVMs are development and evaluation systems that enable developers to write software and
develop hardware around the Jacinto7 family of processors. The main elements of the system are available on
the EVM system itself. This gives developers the basic resources needed for most general-purpose type projects
that encompass the Jacinto7 processor.
Beyond the basic resources provided, additional functionality can be added via expansion cards.
This Technical User’s Guide describes the hardware architecture of the Jacinto7 EVM – Quad Port Ethernet
Expansion board (QP-ENET), which is interfaced with J7 EVM boards through Serial Ethernet Expansion
Connector.
1.1 Key Features
Key features of QP-ENET:
• Ethernet
– 4x 10/100/1000Mbps - SGMII ports (VSC8514XMK-11)
• Board ID EEPROM
• Programmable Clock Generator
The orderable part number is provided in the table below:
Jacinto7 EVM Add-on Module
Quad Port Ethernet Expansion J721EXENETXPANEVM
1.2 Thermal Compliance
There is elevated heat on the processor/heatsink: use caution, particularly at elevated ambient temperatures.
Although the processor/heatsink is not a burn hazard, caution should be used when handling the EVM due to
increased heat in the area of the heatsink.
1.3 EMC, EMI, and ESD Compliance
Components installed on the product are sensitive to Electrostatic Discharge (ESD). TI recommends that this
product be used in an ESD controlled environment. This may include a temperature and/or humidity controlled
environment to limit the build-up of ESD. TI also recommends using ESD protection such as wrist straps and
ESD mats when interfacing with the product.
The product is used in the basic electromagnetic environment as in laboratory condition and the applied
standard will be as per EN IEC 61326-1:2021.
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2 QP-ENET Board Identification and Installation
2.1 QP-ENET Board Component Identification
Figure 2-1. QP-ENET Expansion Board Component Identification
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2.2 Interfacing QP-ENET Expansion Board with J784S4XG01EVM Board
QP-ENET Expansion boards shall be interfaced with Jacinto7 J784S4XG01EVM in bottom mating
configurations. The images below show the J7AHP EVM board connectors J51 and J52, which mate with the
QP-ENET board as an example, with expansion connectors J3 on the QP-ENET mated to the SGMII Expansion
connectors on the J7AHP EVM. It is valid to support/install on only one QP-ENET board, and in either location.
Figure 2-2. QP-ENET Expansion Board Bottom Side
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Figure 2-3. Q/SGMII Expansion Connector on J784S4XG01EVM Bottom Side
2.2.1 Detailed Board Assembly Procedure (J784S4XG01EVM)
This assembly procedure example is given for mating the QP-ENET board with the J784S4XG01EVM board.
1. Take the Assembled J784S4XG01EVM Board
2. Add M2.5 x 5mm hex spacers on each mounting holes provided on either sides of the J51 & J52 connector
of the J784S4XG01EVM and secure it with M2.5 x 4 mm Phillips screws from the bottom sides to hold the
spacer in place.
3. Add M3 x 12mm Phillips screws through the mounting hole provided between the Ethernet connectors on
the QP ENET board (shown in the picture below) and secure it with a M3 x 5mm hex spacer from the other
side (this step is done only on the QP ENET board).
4. Mount the QP board onto the J784S4XG01EVM connectors J51 & J52, making sure the connectors are
seated evenly.
5. Add M2.5 x 4 mm Phillips screws from the top side of the QP to secure the QP mating with the
J784S4XG01EVM board.
6. Add the M2.5 x 5 mm male to male spacer from the top side of the J784S4XG01EVM board to secure the
remaining M3 screw protruding from the QP.
7. Add a M3 x 5mm spacer from the top side of the J784S4XG01EVM board to lock the other end of the M3
x12mm Phillips screw.
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Figure 2-4. QP ENET Board
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Figure 2-5. Bottom Side of J784S4XG01EVM
Figure 2-6. Top Side of J784S4XG01EVM
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Figure 2-7. J784S4XG01EVM - QP ENET Board Assembly Procedure
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3 QP-ENET Expansion Board Hardware Architecture
This section explains the Hardware Architecture of QP-ENET Expansion Board in detail.
3.1 QP-ENET Expansion Board Hardware Top Level Diagram
The generic functional block diagram of the QP-ENET Expansion Board is shown below.
Figure 3-1. Functional Block Diagram of QP-ENET Expansion Board
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
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Table 3-1. ENET Expansion Connector J3 Pinouts (continued)
PIN Net Name PIN Net Name
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
3.3 Board ID EEPROM
The Quad port Ethernet Expansion Board is identified by its version and serial number, which are stored in the
onboard EEPROM. On the J784S4XG01EVM, there are two QP-ENET expansion connectors available: one
QP-ENET is set to address 0x54, the other one is set to 0x51, which are accessible on WKUP_I2C0.
The first 259 bytes of addressable EEPROM memory are preprogrammed with identification information for each
board. The remaining 32509 bytes are available to the user for data or code storage.
Figure 3-2. Board ID EEPROM
Table 3-2. Board ID Memory Header Information
Header Field Name Size (bytes) Description
MAGIC 4 Magic Number
TYPE 1 Fixed length and variable position board ID
header
2 Size of payload
BRD_INFO TYPE 1 Payload type
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Table 3-2. Board ID Memory Header Information (continued)
Header Field Name Size (bytes) Description
Length 2 Offset to next header
Board_Name 16 Name of the board
Design_Rev 2 Revision number of the design
PROC_Nbr 4 PROC number
Variant 2 Design variant number
PCB_Rev 2 Revision number of the PCB
SCHBOM_Rev 2 Revision number of the schematic
SWR_Rev 2 First software release number
VendorID 2 Vendor ID
Build_Week 2 Week of the year of production
Build_Year 2 Year of production
BoardID 6 Reserved. Not populated with any value
Serial_Nbr 4 Incrementing board number
MAC_ADDR TYPE 1 payload type
Length 2 Size of payload
MAC control 2 MAC header control word
MAC_addrs 192 MAC address
Contains 5 valid MAC addresses. Four
MAC addresses for RGMII ports and one
MAC address for RMII port.
END_LIST TYPE 1 End Marker
These board ID details are programmed on the EEPROM from the address 0x0h.
3.4 Ethernet Interface
The Jacinto7 EVM – QP-ENET Expansion board provides an option for users to validate the Jacinto7 SoC’s
SGMII controllers.
The J7 EVM includes an SGMII connection between the VSC8514XMK Quad Port SGMII PHY and the network
subsystem (NSS) of the processor. One channel of SGMII interfaces from the SERDES domain of the J7
processor used on the QP ENET board.
3.4.1 Quad Port SGMII PHY Default Configuration
The QP-ENET uses the PHY of the 138-pin QFN package, designated with the XMK suffix, which supports only
the SGMII interface.
The VC8514 device includes three external PHY address pins, PHYADD [4:2] to allow control of multiple PHY
devices on a system board sharing a common management bus. These pins set the most significant bits of the
PHY address port map. The lower two bits of the address for each port are derived from the physical address of
the port (0 to 3) and the setting of the PHY address reversal bit in register 20E1, bit 9.
Table 3-3. RGMII PHY Strap Configuration
Ports SGMII Port1 SGMII Port2 SGMII Port3 SGMII Port4
Connectors J1A J1B J2A J2B
PHY Address 10010 10011 10000 10001
Auto Negotiation Enabled Enabled Enabled Enabled
ANEGSel 10/100/1000 10/100/1000 10/100/1000 10/100/1000
CLK_SQUELCH No RCVRD Clock No RCVRD Clock No RCVRD Clock No RCVRD Clock
3.4.2 SGMII Clocking Scheme
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3.4.2.1 Main Clock
The reference clock to the PHY is generated from TI’s Clock Generator Mfr. Part Number# CDCI6214RGET,
which is placed on the J7AHP EVM Board. Clock inputs are AC coupled and LVDS compliant. The clock
generator can be configured by I2C0 of the J7AHP SoC. The I2C address of this clock generator is 0x77.
Figure 3-3. Default Clock Source on J7AHP EVM Board
3.4.2.2 Optional Clock
Optionally, the reference clock can be supplied by the SERDES clock generator Mfr. Part Number#
CDCI6214RGET located on QP-ENET Board, which can be configured by I2C0 of the J7 SOC. The I2C address
of this clock generator is 0x77, and this address conflicts with the CDCI Chip on EVM Boards. An I2C switch on
the Quad port Ethernet Expansion Board is used to remove the address conflict by connecting any one of the
clock generators.
Figure 3-4. Clock Source I2C MUX
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Figure 3-5. QP-ENET Optional Clock Source
Setting the CDCI_I2C_SEL IO EXP bit high will connect the I2C bus to CDCI (for programming) on the Quad
Port Ethernet Expansion Board. During this time, the CDCI device on the EVM boards should be in reset mode.
Also, there are resistor options provided that must be adjusted to reflect any change in source clock selection;
this is given in the following images.
Figure 3-6. SGMII PHY Clock Input Source Path Selection
Figure 3-7. SGMII PHY Clock Configuration
3.4.3 Ethernet Port LED Indication
The following table shows the LED function of the SGMII ports RJ45 connectors. The Right LED gives the
indication of link status and collision presence; if the LED is turned OFF then its means that the link is
established in half-duplex mode, or no link established. If the LED is turned ON then the link is established in full-
duplex mode. If the LED is blinking or pulse-stretching, then it means the link is established in half-duplex mode
but collisions are present. The Left LED gives speed and activity status; if LED is blinking or pulse-stretching it
denotes link activity and if not then no activity.
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Table 3-4. SGMII Ports LED Function
RGMII Port RJ45-LED FUNCTION
RIGHT - YELLOW Duplex/Collision
LEFT - GREEN 10/1000Mbps Speed/Activity
LEFT - ORANGE 100Mbps Speed/Activity
3.4.4 Reset and Power-down Signals
The Reset signal on QP-ENET, QSGMII_RESETz is a reset signal sourced from EVM boards. This signal is
used to reset the QSGMII PHY on the board.
QSGMII_RESETz is an AND output of the SOC PORz signal and ENET reset signal. The ENET reset signal is
asserted by an I2C GPIO Expander2 (I2C ADD# 0x22, I2C0) on the EVM boards.
The Power-down signal on QP-ENET, ENET_EXP_PWRDN is given by the I2C GPIO Expander2 (I2C ADD#
0x22, I2C0) on the EVM boards; this signal is used to put SGMII PHY on the QP-ENET board to inactive state.
By default, this signal has a pull-up on the EVM board, i.e. the PHY is in active state all the time unless low is
asserted on this signal.
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
DATE REVISION NOTES
January 2023 * Initial Release
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A Appendix
A.1 Appendix – I (Interface Mapping)
J721EXSOMG01EVM, J7200XSOMG01EVM, and J784S4XG01EVM Interface Mapping on QP-ENET
Expansion is provided in the following table.
Table A-1. Interface Mapping
QP-ENET Peripheral QP-ENET Interface J721EXSOMG01EVM
Connectivity
J7200XSOMG01EVM
Connectivity
J784S4XG01EVM
Connectivity
SGMII(U2) SERDES Signals SERDES0_TX/RX1 Port SERDES0_TX/RX2 Port SERDES2_TX/RX2 on
ENET Conn1 ,
SERDES2_TX/RX3 on
ENET Conn2
MDIO Signals MDIO0 MDIO0 MDIO1
Board ID EEPROM (U6) Configuration I2C WKUP_I2C0 WKUP_I2C0 WKUP_I2C0
CLOCK
GENERATOR(U4)
Configuration I2C I2C0 I2C0 I2C0
A.2 Appendix – II (QP-ENET Board GPIO Mapping)
QP-ENET GPIO Mapping is shown in the following table.
Table A-2. QP-ENET GPIO Mapping
QP-ENET
Peripheral
Peripheral
IO
Direction
(for SoC)
Default Active
State
J721EXSOMG01EVM
Connectivity
J7200XSOMG01EVM
Connectivity
J784S4XG01EVM
Connectivity
SGMII Port
0, Port1
Port 2 &
Port3
Interrupt Input PU Active Low GPIO1_22 GPIO0_4 WKUP_GPIO0_84,
WKUP_GPIO0_85
Power
Down
Output PU Active High I2C GPIO
EXPANDER2(U31.P20
, I2C0)
I2C GPIO
EXPANDER2(U31.P20
, I2C0)
I2C GPIO
EXPANDER2(U173.P20
, I2C0)
Reset Output PD Active Low I2C GPIO
EXPANDER2(U31.P21
, I2C0)
I2C GPIO
EXPANDER2(U31.P21
, I2C0)
I2C GPIO
EXPANDER2(U173.P20
, I2C0),
I2C GPIO
EXPANDER2(U173.P11
, I2C0)
I2C MUX
select
Output PD Select
Signal
I2C GPIO
EXPANDER2(U31.P22
, I2C0)
I2C GPIO
EXPANDER2(U31.P22
, I2C0)
I2C GPIO
EXPANDER2(U173.P22
, I2C0),
I2C GPIO
EXPANDER2(U173.P01
, I2C0)
Spare
GPIO
Input/
Output
NA NA I2C GPIO
EXPANDER2(U31.P23
, I2C0)
I2C GPIO
EXPANDER2(U31.P23
, I2C0)
I2C GPIO
EXPANDER2(U173.P23
, I2C0),
I2C GPIO
EXPANDER2(U173.P12
, I2C0),
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