Digilent PmodNIC User Manual
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Revision: November 20, 2009
Note: This document applies to REV B of the board.
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Overview
The PmodNIC is an interface board for the
Microchip® ENC28J60 Stand-Alone Ethernet
Controller. The ENC28J60 provides integrated
MAC and PHY support, so the PmodNIC can add
Ethernet functionality to any Digilent system board.
Features include:
• standard SPI interface
• 10Mb/s data rates
• IEEE 802.3 compatible Ethernet controller
• MAC support
• 10BASE-T PHY support
Functional Description
The primary communications interface with the
PmodNIC is an SPI bus. The PmodNIC
communicates in SPI mode 0 only, MSB first. An
RST pin provides the host with an active low,
asynchronous hardware reset for the PmodNIC. The
PmodNIC also provides an active low interrupt
indicator pin (INT), allowing a host to detect multiple
interrupt conditions on the PmodNIC.
For more information about the hardware
connections, see the PmodNIC schematic at
www.digilentinc.com.
The PmodNIC provides only the hardware for a
network interface. Protocol stack software (such as
TCP/IP) must be provided by the user.
For more information about the ENC28J60 Ethernet Controller, see the data sheet at
www.microchip.com.
PmodNIC Block Diagram
Doc: 502-158 page 1 of 2
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
PmodNIC™ Reference Manual
Connector J1 – SPI Communications
Pin Signal Description
1 SS Slave Select
2 MOSI Master out/Slave in Data
3 MISO Master in/Slave out Data
4 SCK Serial Clock
5 GND Power Supply Ground
6 VCC Power Supply (3.3V)
7 NC Not Connected
8 NC Not Connected
9 RST Hardware Reset
10 INT Interrupt Output
11 GND Power Supply Ground
12 VCC Power Supply (3.3V)
Connector J2 - Ethernet Interface
Interface Connector Signal Description
www.digilentinc.com
®
www.digilentinc.com Copyright Digilent, Inc. page 2 of 2
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