Microchip Technology AC164121 Data Sheet

The Ethernet PICtail™ Daughter Board is an Ethernet demonstration board for evaluating 

Microchip Technology's ENC28J60 stand-alone 10 Base-T Ethernet controller. It is an expansion 

board compatible with a number of PICDEM™ demonstration boards. A complete list of compatible 

PICDEM demonstration boards is available on Microchip's web site.

To get started, a compatible PICDEM demonstration board is required. In general, a board is 

compatible if it has a PICtail™ board interface expansion port, which is a 14x2 connector. Most 

PICDEM demonstration boards do not have the female header installed. Thus, a 14x2 female 

connector is included with this kit for the user to install onto the PICDEM demonstration board if 

necessary. When connecting the two boards together, pay close attention to the orientation of the 

connector and pin alignment. The AC/DC power adapter should be plugged into the PICtail board's 

power socket. Only one AC/DC power adapter is required because the Ethernet PICtail board is 

capable of supplying power to the PICDEM demonstration board.

•  ENC28J60 Ethernet Controller with 25 MHz oscillator and integrated magnetic RJ-45 connector 

(see device data sheet DS39662 for additional information)

•  256 Kbits SPI EEPROM (25LC256) for storing web pages and configurations

•  Dedicated power supply

•  PICtail™ Daughter Board connection interface

As shipped from the factory, some of the jumper locations are bridged by circuit traces forming a 

default setup. To change this, the user will need to cut the traces and install pins and a block 

jumper. Afterward, the features can be enabled or disabled easily by installing or removing the 

jumper.

Atlanta (770) 640-0034
Boston (774) 760-0087
Chicago (630) 285-0071
Dallas (972) 818-7423
Detroit (248) 538-2250
Kokomo (765) 864-8360
Los Angeles (949) 462-9523
Phoenix (480) 792-7200
San Jose (650) 215-1444
Toronto (905) 673-0699

Australia - Sydney 61-2-9868-6733
China - Beijing 86-10-8528-2100
China - Chengdu 86-28-8676-6200
China - Fuzhou 86-591-8750-3506
China - Hong Kong SAR 852-2401-1200
China - Qingdao 86-532-8502-7355
China - Shanghai 86-21-5407-5533
China - Shenyang 86-24-2334-2829
China - Shenzhen 86-755-8203-2660
China - Shunde 86-757-2839-5507
China - Wuhan 86-27-5980-5300
China - Xian 86-29-8833-7250
India - Bangalore 91-80-2229-0061
India - New Delhi 91-11-5160-8631
India - Pune 91-20-2566-1512
Japan - Yokohama 81-45-471-6166
Korea - Gumi 82-54-473-4301
Korea - Seoul 82-2-554-7200

Malaysia - Penang 60-4-646-8870
Philippines - Manila 63-2-634-9065
Singapore 65-6334-8870
Taiwan - Hsin Chu 886-3-572-9526
Taiwan - Kaohsiung 886-7-536-4818
Taiwan - Taipei 886-2-2500-6610
Thailand - Bangkok 66-2-694-1351

Austria - Wels 43-7242-2244-399
Denmark - Copenhagen 45-4450-2828 
France - Paris 33-1-69-53-63-20
Germany - Munich 49-89-627-144-0
Italy - Milan 39-0331-742611
Netherlands - Drunen 31-416-690399
Spain - Madrid 34-91-708-08-90
UK - Wokingham 44-118-921-5869

                                      As of 10/31/05

*DS51569B*

The Microchip name and logo, the Microchip logo, PIC and PICmicro are registered trademarks of Microchip Technology Incorporated in the U.S.A.
and other countries. In-Circuit Serial Programming, ICSP, PICDEM and PICtail are trademarks of Microchip Technology Incorporated in the U.S.A.  
and other countries. All other trademarks mentioned herein are property of their respective companies. © 2006, Microchip Technology Incorporated,  
Printed in the U.S.A. All Rights Reserved. 1/06

J8

J5

Disabled (Default)

Pin 1-2 (Default)

Clock out path from ENC28J60 to PICDEM™ board is disabled

Clock out path from ENC28J60 to PICDEM board is enabled

Pin 2-3

J6

J7

J9

Pin 1-2 (Default)

Pin 2-3
Pin 1-2 (Default)

Pin 2-3

Pin 1-2

Pin 2-3 (Default)

Not connected

RC5 is connected to ENC28J60/25LC256's SI pin

RC7 is connected to ENC28J60/25LC256's SI pin

RC4 is connected to ENC28J60/25LC256's SO pin

RB0 is connected to ENC28J60/25LC256's SO pin
RC3 is connected to ENC28J60/25LC256's SCK pin

RB1 is connected to ENC28J60/25LC256's SCK pin

3.3V power supply to PICDEM demonstration board

5V power supply to PICDEM demonstration board

No power supply to PICDEM demonstration board

For evaluation purposes, each Ethernet PICtail board comes with a board number which can be 

used to form a unique MAC address. This number can be found on the sticker label on the back 

of each board. To form a MAC address, replace the last 3 bytes of the following MAC address, 

00-04-A3-XX-XX-XX, with the number from the sticker. The number on the sticker is in decimal 

format and conversion to a hex number is required. For example, if the sticker has the value of 

"12345", then the MAC address would be 00-04-A3-00-30-39.

To obtain the most recent and complete documentation for this demonstration board, including:

- User's Guide 

- Board Description 

- Board Schematics

- Source Code 

- Application Examples 

- Links to Web Seminars

please refer to the web site:  

Note 1: This option is available to support the PICDEM™ FS USB Demo Board.

Firmware examples can be downloaded from 

. Make 

sure to download the firmware version that has been designated for the particular PICDEM 

demonstration board that you have.

J4

Pin 2-3

Pin 1-2 (Default)

Reserved – Do Not Use

DS51569B

SCK
SO

SI

CLKOUT

I

RB3

SPI Chip Select for ENC28J60

I

RC3 or RB1

SPI Clock

O

RC4 or RB0

SPI Data Out from ENC28J60/25LC256

I

RC5 or RC7

SPI Data In to ENC28J60/25LC256

I

RB5

Reset Signal

O

RB2

O

OSC1

Programmable Clock Output

CS for ENC28J60

RESET

INT

INT Interrupt Signal

CS for 25LC256

I

RB4

SPI Chip Select for 25LC256