SAMA5D3
ETHERNET DEVELOPMENT SYSTEM
USER’S GUIDE
2018 Microchip Technology Inc.
DS50002789A-page 15
Chapter 3. Board Details and Configuration
3.1
INTRODUCTION
The SAMA5D3 EDS board is designed to connect to compatible Microchip Ethernet
switch and PHY evaluation boards. The board is built around the integration of a Cor-
tex
®
-A5-based microcontroller with external SDRAM and Flash memory, dual Ethernet
ports, two host USB ports, and one device USB port, an SD interface, and a serial
debug interface. It comes programmed with Linux, Ethernet drivers, and protocol
stacks for switch and PHY evaluation.
3.2
POWER SOURCE
Power is supplied to the board via a power jack. The nominal supply voltage is 12V,
and the acceptable range is 7V to 20V. The current requirement is less than 500 mA
without external loads. The barrel connector has an inner diameter of 2.5 mm.
This board can supply power to the other boards connected to the RGMII connector J5
and to the RMII connector J6.
Green power LEDs D2 and D3 indicate 3.3V and 5V power, respectively.
The board cannot be powered via USB.
3.3
PROCESSOR AND MEMORY
The board has 256 MB of SDRAM and 256 MB of NAND flash. As shown in
,
a card slot at the bottom of the board accepts an SD card. The processor can boot
either from the on-board NAND flash or from an SD card.
When booting, the SD card takes precedence. If there is no SD card, the processor
attempts to boot from the on-board flash. The J20 jumper must be installed to enable
writing and reading the on-board flash memory.
Note:
The voltage selection on the J2 jumper controls the voltage for the SD card
interface. Set J2 for 3V3 whenever using an SD card.
