MOD-IO2 extension board
USER’S MANUAL
Revision D, May 2015
Designed by OLIMEX Ltd, 2012
All boards produced by Olimex LTD are ROHS compliant
OLIMEX© 2015
MOD-IO2 user's manual
DISCLAIMER
© 2015 Olimex Ltd. Olimex®, logo and combinations thereof, are registered trademarks of Olimex Ltd. Other product
names may be trademarks of others and the rights belong to their respective owners.
The information in this document is provided in connection with Olimex products. No license, express or implied
or otherwise, to any intellectual property right is granted by this document or in connection with the sale of
Olimex products.
This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License. To view a copy of
this license, visit
http://www.creativecommons.org/licenses/by-sa/3.0/.
This hardware design by Olimex LTD is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported
License.
The software is released under GPL.
It is possible that the pictures in this manual differ from the latest revision of the board.
The product described in this document is subject to continuous development and improvements. All particulars of the
product and its use contained in this document are given by OLIMEX in good faith. However all warranties implied or
expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded. This
document is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not be liable for any loss or
damage arising from the use of any information in this document or any error or omission in such information or any
incorrect use of the product.
This evaluation board/kit is intended for use for engineering development, demonstration, or evaluation purposes only
and is not considered by OLIMEX to be a finished end-product fit for general consumer use. Persons handling the
product must have electronics training and observe good engineering practice standards. As such, the goods being
provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related
protective considerations, including product safety and environmental measures typically found in end products that
incorporate such semiconductor components or circuit boards.
Olimex currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive. Olimex assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
THERE IS NO WARRANTY FOR THE DESIGN MATERIALS AND THE COMPONENTS
USED TO CREATE MOD-IO2. THEY ARE CONSIDERED SUITABLE ONLY FOR MOD-
IO2.
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OLIMEX© 2015
MOD-IO2 user's manual
Table of Contents
DISCLAIMER............................................................................................................. 2
CHAPTER 1 OVERVIEW......................................................................................... 5
1. Introduction to the chapter.......................................................................................................5
1.1 Features.....................................................................................................................................5
1.2 MOD-IO vs MOD-IO2............................................................................................................ 5
1.3 Target market and purpose of the board...............................................................................6
1.4 Organization.............................................................................................................................6
CHAPTER 2 SETTING UP THE MOD-IO2 BOARD............................................ 7
2. Introduction to the chapter.......................................................................................................7
2.1 Electrostatic warning...............................................................................................................7
2.2 Requirements........................................................................................................................... 7
2.3 Powering the board..................................................................................................................7
2.4 Firmware description and basic usage under Linux............................................................8
2.4.1 Custom software tool for controlling MOD-IO2 under Linux......................................... 8
2.4.2 I2CTools for controlling MOD-IO2 under Linux............................................................ 11
CHAPTER 3 MOD-IO2 BOARD DESCRIPTION................................................14
3. Introduction to the chapter.....................................................................................................14
3.1 Layout (top view)...................................................................................................................14
CHAPTER 4 THE PIC16F1503 MICROCONTROLLER................................... 15
4. Introduction to the chapter.....................................................................................................15
4.1 The PIC16F1503 features......................................................................................................15
CHAPTER 5 CONNECTORS AND PINOUT....................................................... 16
5. Introduction to the chapter.....................................................................................................16
5.1 ICSP........................................................................................................................................ 16
5.2 UEXT modules.......................................................................................................................16
5.2.1 Female connector....................................................................................................................... 16
5.2.2 Male connector........................................................................................................................... 17
5.3 Relay output connectors........................................................................................................17
5.4 GPIO connectors....................................................................................................................18
5.5 PWR Jack...............................................................................................................................18
5.6 Jumper description................................................................................................................19
5.6.1 PROG......................................................................................................................................... 19
5.6.2 SDA_E/SCL_E........................................................................................................................... 19
5.6.3 UEXT_FPWR_E........................................................................................................................ 19
5.6.4 UEXT_MPWR_E...................................................................................................................... 19
5.7 Additional hardware components........................................................................................ 19
CHAPTER 6 BLOCK DIAGRAM AND MEMORY.............................................20
6. Introduction to the chapter.....................................................................................................20
6.1 Processor block diagram.......................................................................................................20
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OLIMEX© 2015
MOD-IO2 user's manual
6.2 Physical memory map........................................................................................................... 21
CHAPTER 7 SCHEMATICS...................................................................................22
7. Introduction to the chapter.....................................................................................................22
7.1 Eagle schematic......................................................................................................................22
7.2 Physical dimensions...............................................................................................................24
CHAPTER 8 REVISION HISTORY AND SUPPORT..........................................25
8. Introduction to the chapter.....................................................................................................25
8.1 Document revision................................................................................................................. 25
8.2 Board's revision......................................................................................................................26
8.3 Useful web links and purchase codes...................................................................................27
8.4 Product support..................................................................................................................... 28
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OLIMEX© 2015
MOD-IO2 user's manual
CHAPTER 1 OVERVIEW
1. Introduction to the chapter
Thank you for choosing the MOD-IO2 single board computer from Olimex! This document
provides a user’s guide for the Olimex MOD-IO2 board. As an overview, this chapter gives the
scope of this document and lists the board’s features. The differences between the members of the
MOD-IO2 and MOD-IO boards are mentioned. The document’s organization is then detailed.
The MOD-IO2 development board enables code development of applications running on the
microcontroller PIC16F1503, manufactured by Microchip.
1.1 Features
PIC16F1503 microcontroller
ICSP 6 pin connector for in-circuit programming with PIC-ICD2-POCKET and PIC-KIT3
or other compatible programmer/debugger.
9-pin terminal screw connector for 7 GPIOs 3.3V and GND
PWR jack for 12VDC
7 GPIOs which could implement different functionality as PWM, SPI, I2C etc.
2 relay outputs with 15A/250VAC contacts with screw terminals
RELAY output status LEDs
Both male and female UEXT connectors
Four mounting holes 3.3mm ~ (0.13)"
UEXT female-female cable included
FR-4, 1.5 mm (0.062"), soldermask, white silkscreen component print
dimensions 61×52mm ~(2.4×2.05)"
1.2 MOD-IO vs MOD-IO2
MOD-IO2 is a smaller input output extension module compared to MOD-IO both in terms of size
and in terms of functionality, however in a lot of situations MOD-IO2 might provide the better
choice. Designs which need optocouplers should consider MOD-IO. In a lot of the other cases
MOD-IO2 might be the better choice since it is possible to stack multiple MOD-IO2's over each
other.
MOD-IO has a better power supply with the option to be supplied in the range of 8-30VDC.
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