Microchip Technology EVB-LAN9252-SPI, Quick Start Manual

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EVB-LAN9252-SPI Quick Start Guide
DS50002604A-page 14
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2017 Microchip Technology Inc.
2.1.2 Power
When connected to a compatible development system through J3 , the power test
points are to be used to confirm a proper voltage is present on the board. When wiring
the board to an external development board, the power test points are used to connect
an external power supply to the board.
• TP2 is tied to the 3.3V supply for the LAN9252 and the EEPROM for configura-
tion.
• TP3 is tied to the GND plane of the board. Additional GND access can be found
on J8 and J9 .
2.1.3 Digital Interface Connector
EVB-LAN9252-SPI also has a mass interface connector on the bottom of the board.
This interface is used to connect many of the LAN9252 signals to third party develop-
ment platforms. These pins enable evaluation of HBI and SPI abstraction using
LAN9252. LAN9252 must also be configured with the correct ESI (EtherCAT Slave
Information) via EEPROM for these signals to be active.
FIGURE 2-2: EVB-LAN9252-SPI BOTTOM VIEW
2.2 INTERFACING WITH A THIRD PARTY PROCESSOR VIA SPI
The EVB-LAN9252-SPI can be connected to any microprocessor development plat-
form with exposed SPI pins. Once the pins have been connected properly, software
development can begin. The process can be broken down into three steps:
2.2.1 Connect pins
1. Connect the SPI pins to J4-J7 .
2. Connect to Power Test Points to a bench supply, or 3.3V supply on the processor
board. Connect GND to
TP3 and 3.3V to TP2 .