Olimex IMX233-OLINUXINO-MICRO User guide

OLinuXino-MICRO

Open-source single-board Linux computer

USER’S MANUAL

Revision K, March 2013

Designed by OLIMEX Ltd, 2012

All boards produced by Olimex LTD are ROHS compliant

DISCLAIMER

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.

The Hardware project is released under the Creative Commons Attribution-Share Alike 3.0 United States License. You may reproduce it for both your own personal use, and for commercial use. You will have to provide a link to the original creator of the project http://www.olimex.com on any documentation or website. You may also modify the files, but you must then release them as well under the same terms. Credit can be attributed through a link to the creator website: http://www.olimex.com

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 OLINUXINO. THEY ARE CONSIDERED SUITABLE ONLY FOR OLINUXINO.

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Table of Contents

DISCLAIMER ............................................................................................................. 2

CHAPTER 1: OVERVIEW ........................................................................................ 5

1. Introduction to the chapter ....................................................................................................... 5

1.1 Features ..................................................................................................................................... 5

1.2 The OLinuXino family ............................................................................................................ 6

1.2 Target market and purpose of the board ............................................................................... 6

1.3 Organization ............................................................................................................................. 7

CHAPTER 2: SETTING UP THE OLINUXINO BOARD ..................................... 8

2. Introduction to the chapter ....................................................................................................... 8

2.1 Electrostatic warning ............................................................................................................... 8

2.3 Requirements ........................................................................................................................... 8

2.4 Powering the board .................................................................................................................. 9

2.5 Prebuilt software ...................................................................................................................... 9

2.6 Using BitBurner ..................................................................................................................... 10

2.7 Building the Debian Linux image ......................................................................................... 11

2.8 How to blink the LED ............................................................................................................ 13

2.9 How to setup Arch Linux distribution ................................................................................. 13

2.10 How setup the I2C, SPI, UART .......................................................................................... 14

CHAPTER 3: OLINUXINO BOARD DESCRIPTION ......................................... 15

3. Introduction to the chapter ..................................................................................................... 15

3.1 Layout (top view) ................................................................................................................... 16

3.2 Layout (bottom view) ............................................................................................................. 17

CHAPTER 4: THE iMX233 MICROCONTROLLER ......................................... 18

4. Introduction to the chapter ..................................................................................................... 18

4.1 The microcontroller ............................................................................................................... 18

CHAPTER 5: CONTROL CIRCUITY ................................................................... 21

5. Introduction to the chapter ..................................................................................................... 21

5.1 Reset ........................................................................................................................................ 21

5.2 Clock ....................................................................................................................................... 21

5.3 Power supply circuit .............................................................................................................. 21

CHAPTER 6: CONNECTORS AND PINOUT ...................................................... 23

6. Introduction to the chapter ..................................................................................................... 23

6.1 Debugging interfaces ............................................................................................................. 23

6.1.1 UART debug ........................................................................................................................ 24

6.1.2 SJTAG debug ...................................................................................................................... 24

6.1.3 Classic JTAG debug ............................................................................................................ 25

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6.2 SD/MMC slot .......................................................................................................................... 27

6.3 UEXT connector ..................................................................................................................... 28

6.4 CON1 and CON2 pads .......................................................................................................... 29

6.5 USB HOST .............................................................................................................................. 33

6.6 PWR Jack ............................................................................................................................... 33

6.7 Headphones and line-in connector ....................................................................................... 34

6.8 Composite video connector ................................................................................................... 34

6.9 Boot mode positions ............................................................................................................... 34

6.10 Jumper description .............................................................................................................. 35

6.10.1 SCL_SW/SCL_HW and SDA_SW/SDA_HW ................................................................ 35

6.10.2 5V_E ................................................................................................................................... 35

6.10.3 3.3V_E jumper .................................................................................................................. 35

6.10.4 Boot mode selecting jumpers ........................................................................................... 35

6.11 Additional hardware components ....................................................................................... 35

6.12 Accessories ............................................................................................................................ 36

6.12.1 USB-SERIAL-CABLE-F .................................................................................................. 36

CHAPTER 7: BLOCK DIAGRAM AND MEMORY ........................................... 37

7. Introduction to the chapter ..................................................................................................... 37

7.1 Memory addresses ................................................................................................................. 37

7.2 Processor block diagram ....................................................................................................... 38

7.3 Physical memory map ........................................................................................................... 39

CHAPTER 8: SCHEMATICS .................................................................................. 40

8. Introduction to the chapter ..................................................................................................... 40

8.1 Eagle schematic ...................................................................................................................... 40

8.2 Physical dimensions ............................................................................................................... 42

CHAPTER 9: REVISION HISTORY AND SUPPORT ........................................ 43

9. Introduction to the chapter ..................................................................................................... 43

9.1 Document revision ................................................................................................................. 43

9.2 Board revision ........................................................................................................................ 45

9.3 Useful web links and purchase codes ................................................................................... 46

9.3 Product support ..................................................................................................................... 47

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CHAPTER 1: OVERVIEW

1. Introduction to the chapter

Thank you for choosing the OLinuXino single board computer from Olimex! This document provides a user’s guide for the Olimex OLinuXino-MICRO 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 OLinuXino family are mentioned. The document’s organization is then detailed.

The OLinuXino development board enables code development of applications running on the microcontroller i.MX233, manufactured by FreeScale Semiconductor.

OLinuXino is an open-source, open-hardware project and all documentation is available to the customer.

1.1 Features

• iMX233 ARM926J processor at 454Mhz

• 64 MB RAM

• SD-card connector for booting the Linux image

• TV PAL/NTSC video output

• 1 USB High Speed Host

• three Buttons

• 2x30 pin GPIO for connection of other hardware

• PCB dimensions: 3.00'' x 1.70'' (76.2mm x 43.2mm)

• Nominal dimensions: 3.40'' x 1.70'' (86.4mm x 43.2mm)

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1.2 The OLinuXino family

Table of comparison

OLinuXino-MICRO OLinuXino-MINI OLinuXino-MAXI

Processor iMX233 @ 454Mhz iMX233 @ 454Mhz iMX233 @ 454Mhz

Ram [MB] 64 64 64

# USB hosts 1 3 2

100/150 Mbit Ethernet*

No/WIFI option** No/WIFI option*** Yes/WIFI option**

GPIO connector 60pins 40pins 40pins

# Buttons 3 2 2

Reset button Yes Yes Yes

DC power supply 5V 6V-16V 6V-16V

Dimensions 3.40'' x 1.70'' 3.70'' x 2.65'' 3.70'' x 2.65''

Breadboarding Yes No No

Audio IN connector No Yes Yes

Audio OUT connector No Yes Yes

UEXT connector No Yes Yes

Built-in USB hub No Yes Yes

* 100Mbit Ethernet for the wired network of OLinuXino-MAXI. 150Mbit for the WIFI following

811.02n standard.

** All three boards have the option to work with MOD-WIFI_RTL8188, which is USB WIFI modem with RTL8188CU chip and can be purchased separately. MOD-WIFI_RTL8188 can be connected to any of the OLinuXino boards via the USB.

*** OLinuXino-MINI has additional option of having RTL8188CU hardware mounted! If you wish RTL8188CU embedded in the device you should purchase OLinuXino-MINI-WIFI. Choosing the embedded WIFI option will leave your USB-HOSTs available for use.

1.2 Target market and purpose of the board

The boards from the OLinuXino family are ready to use, easy to setup and are suitable for embedded programming enthusiasts, Linux hobbyists, gadget fans and also professionals (since its low cost makes it very good solution for application orientated embedded systems). The main usage of the board is software embedded development without the urge of understanding perfectly the hardware.

The strong points of the boards are the processor speed, the mobility of the board and the low price.

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Customers have full access to the technical documentation of the board. The software is released under General Purpose License and the board is considered open-hardware.

1.3 Organization

Each section in this document covers a separate topic, organized as follow:

– Chapter 1 is an overview of the board usage and features – Chapter 2 provides a guide for quickly setting up the board and software notes – Chapter 3 contains the general board diagram and layout – Chapter 4 describes the component that is the heart of the board: the iMX233

microcontroller

– Chapter 5 is an explanation of the control circuitry associated with the microcontroller to

reset. Also shows the clocks on the board

– Chapter 6 covers the connector pinout, peripherals and jumper description – Chapter 7 shows the memory map – Chapter 8 provides the schematics – Chapter 9 contains the revision history, useful links and support information

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CHAPTER 2: SETTING UP THE OLINUXINO BOARD

2. Introduction to the chapter

This section helps you set up the OLinuXino development board for the first time. Please consider first the electrostatic warning to avoid damaging the board, then discover the hardware and software required to operate the board.

The procedure to power up the board is given, and a description of the default board behavior is detailed.

2.1 Electrostatic warning

OLinuXino is shipped in a protective anti-static package. The board must not be exposed to high electrostatic potentials. A grounding strap or similar protective device should be worn when handling the board. Avoid touching the component pins or any other metallic element.

2.3 Requirements

In order to set up the OLinuXino-MICRO optimally, the following items are required:

- 5V source of power with 1A maximum amperage.

- SJTAG interface programmer

- USB hub (USB splitter)

- USB keyboard

- Monitor with composite interface or Personal Computer + USB-SERIAL-CABLE

- SD card with Linux image

Note that the board arrives without SD card or Linux image. You can purchase a card with Linux separately. It is recommended that the user has basic Linux experience.

Some of the suggested items can be purchased by Olimex, for instance:

iMX233-OLinuXino-SD - SD card with the Linux image USB-SERIAL-CABLE-F - USB serial console cable female (check “6.1.1 UART Debug” for info

how to connect it to the board) SY0605E - power supply adapter 5V/1A for iMX233-OLinuXino-MICRO

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2.4 Powering the board

The board is powered either via the PWR jack or via a battery. It should be supplied by 5V source with maximum current of 1A from the power jack.

All measures below are taken at 5V.

If measuring the current consumption it should be around 0.06A before initializing all the peripherals.

IMPORTANT! We discovered a situation which might leave some of the SD cards (iMX233OLinuXino-SD) in unrecoverable state when powering OLinuXino-MICRO. The problem might occur if two specific conditions are met simultaneously:

1)Plugged iMX233-OLinuXino-SD micro SD card with holographic sticker on its back side (some of the cards we have distributed are from a brand that places holographic sticker on their backs, the other half lack such a sticker)

2)Plugged USB-SERIAL-CABLE-F at the moment when powering the board

If you happen to have received SD card with holographic sticker on its back side and you use it with OLinuXino-MICRO and you plug USB-SERIAL-CABLE and then you power the board there is a chance of malfunction of the SD card.

There are two possible workarounds to protect the SD card. The first one is simpler and the second one requires some soldering experience.

Workaround 1: First insert the iMX233-OLinuXino-SD card and then power the board (and if powering the board from a battery also press the PWR button). Wait 4-5 seconds and then connect the USB-SERIAL-CABLE-F. After the initial power-up it is safe to use the reset button.

Workaround 2: You will need a Shottky diode. The Shottky should be soldered on the USBSERIAL-CABLE-F TX line/wire (RED cable) with anode towards the board.

When you power the board by battery you have to press the PWR_BUT to start the board. If you start Linux and it is already running no matter which powering method you use (PWR_JACK or BAT) pressing the PWR_BUT will put the Linux in power-save mode.

For the European customers we sell a power supply adapter 5V/1A – SY0605E.

2.5 Prebuilt software

Note that the boards arrive without Linux or SD card. The Linux image can be purchased separately on a SD card or you can built and adjust it yourself.

When we program the boards we change the default position of the following HW_OCOTP_ROM0

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fuses of the processor:

SD_MBR_BOOT(3) - Blown SD_POWER_GATE_GPIO(21:20) – 10-PWM3

For burning the fuse position we use the BitBurner software. This operation is discussed in details before. Proceed with great caution when burning fuses since it is irreversible operation.

The first batches of the board and the SD-card used the Debian Linux image. After that we switched over to ArchLinux for the ease of the package manager. Instructions how to build the ArchLinux can be found at the gitHub address of OLinuXino.

2.6 Using BitBurner

IMPORTANT! MODIFYING THE FUSES IS IRREVERSIBLE PROCESS! BURNING THE WRONG FUSES MIGHT DAMAGE OLINUXINO IRREVERSIBLY! BURNING WRONG FUSES MIGHT CAUSE BOOT PROBLEMS!

BURN FUSES AT OWN RISK!

The bit burning is done via the USB of the computer connected to the OLINUXINO board and the BitBurner software. To be able to burn the fuses you will need to connect a USB-A to USB-A cable between a computer and the board's USB-HOST connector.

Download BitBurner from https://www.olimex.com/dev/OLINUXINO/iMX233-

OLINUXINO/BitBurner.v1.0.4.6.zip. Extract it and start the .exe. If you connect everything you

should see and choose HID-compilant device from the “Select device” drop-down menu.

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2.7 Building the Debian Linux image

Note that building the Linux image from scratch is a time-consuming task. Even with powerful machine and fast internet connection it might take few hours compiling. Some Linux distributions might lack the tools required to compile/build/execute scripts/download from repository – how to get those is not discussed below.

The Linux image is created and downloaded from https://github.com/Freescale/fsl-community-bsp-

platform. For the test here we used Debian 6.0 with GNOME visual libraries. The steps we did:

1) From the terminal created folder “bin” in home folder:

user@dist$: mkdir bin user@dist$: cd bin

Add bin directory to PATH in order to do the next steps easier. Else navigate to the right folders.

2) Installed `repo` utility needed for the bitbake file fetching from the repository:

user@dist$: curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo user@dist$: chmod a+x ~/bin/repo

3) Created directory for the project and download the BSP source from the git repository:

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user@dist$: mkdir fsl-community-bsp user@dist$: cd fsl-community-bsp

~/fsl-community-bsp$: repo init -u https://github.com/Freescale/fsl-community-bsp-platform -b

denzil ~/fsl-community-bsp$: repo sync

4) You can change the settings for the build if you want at fsl-community-bsp/build/conf/local.conf. I changed the “machine” name to “imx233-olinuxino-maxi”. For Linux kernel configurations and settings you can do (of course you can use also the default settings):

~/fsl-community-bsp$:. ./setup-environment build ~/fsl-community-bsp/build$:bitbake linux-imx -c menuconfig

Check the image below:

5) Now to start building the image:

~fsl-community-bsp$:. ./setup-environment build

~fsl-community-bsp/build $: bitbake core-image-minimal

Note: on different Linux distributions you might have different tools installed and you will probably need to install dependencies needed for the compile/build scripts. Here are some (but not all) of the mandatory ones: G++; diffstat; texi2html; chrpath; gawk; texinfo; some git client.

To ensure you have the latest version supported with all the updates visit

https://github.com/OLIMEX/OLINUXINO and https://github.com/Freescale/fsl-community-bspplatform.

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2.8 How to blink the LED

In this sub-chapter you will find a way to achieve the most basic task in electronics – the “Hello World” of electronics - blinking the LED.

First we set the pin responsible for the LED as an output and we can set its value manually to high or low position – make it blink manually. The LED mounted on the board uses GPIO65. You can use external diode instead of the one mounted - you have to look at the table “The Linux implementation of pins” in the hardware section to get the correct linux name for the GPIO pin.

echo out > /sys/class/gpio/gpio65/direction echo 1 > /sys/class/gpio/gpio65/value

If you want to set the blink off you should change the value on the second line to:

echo 0 > /sys/class/gpio/gpio65/value

To show the info for all GPIOs:

ls /sys/class/gpio

To make it turn on – turn off automatically (e.g. blink) we use the text redactor VI to write the Linux script:

echo out > /sys/class/gpio/gpio65/direction while true do echo 1 > /sys/class/gpio/gpio65/value sleep 1 echo 0 > /sys/class/gpio/gpio65/value sleep 1 done

We save it as as “gpio” and we make it executable with

chmod +x gpio

then we execut the script with:

./gpio

The LED should start blinking with 0.5Hz.

2.9 How to setup Arch Linux distribution

You can refer to the manual of OLinuXino-MAXI for general build instructions but mind we haven't tested the algorithm listed there on the MICRO. There shouldn't be significant differences. If you meet such head over to the OLIMEX forums.

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2.10 How setup the I2C, SPI, UART

There are number of examples with our extension module board to achieve those connections on the UEXT. The examples might be used as an example for I2C, SPI or UART communication. You can find them at our GitHub page:

https://github.com/OLIMEX/OLINUXINO/tree/master/SOFTWARE/iMX233

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CHAPTER 3: OLINUXINO BOARD DESCRIPTION

3. Introduction to the chapter

Here you get acquainted with the main parts of the board. Note the names used on the board might differ from the names used below to describe them. For the actual names check the OLinuXino board itself.

The top and the bottom view can be viewed on the next two pages of the manual. There is explanation of the different peripherals in the following chapters of the manual.

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3.1 Layout (top view)

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3.2 Layout (bottom view)

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CHAPTER 4: THE iMX233 MICROCONTROLLER

4. Introduction to the chapter

In this chapter is located the information about the heart of OLinuXino – its microcontroller. The information is a modified version of the datasheet provided by its manufacturers.

4.1 The microcontroller

 ARM926 CPU Running at 454 MHz  Integrated ARM926EJ-S CP  16-Kbyte data cache and 16-Kbyte instruction cache

— One-wire JTAG interface — Resistor-less boot mode selection using integrated OTP values

 32Kbytes of Integrated Low-Power On-Chip RAM  64 Kbytes of Integrated Mask-Programmable On-Chip ROM  1 Kbit of On-Chip One-Time-Programmable (OCOTP) ROM  Universal Serial Bus (USB) High-Speed (Up to 480 Mb/s), Full-Speed (Up to 12 Mb/s)

— Full-speed/high-speed USB device and host functions — Fully integrated full-speed/high-speed Physical Layer Protocol (PHY) — Mass storage host-capable (uncertified by USB-IF)

 Power Management Unit

— Single inductor DC-DC switched converter with multi-channel output supporting Li-Ion batteries. — Features multi-channel outputs for VDDIO (3.3 V), VDDD (1.2 V), VDDA (1.8 V), VDDM (2.5V) and regulated 4.2V source. — Direct power from 5-V source (USB, wall power, or other source), with programmable current limits for load and battery charge circuits. — Silicon speed and temperature sensors enable adaptive power management over temperature and silicon process.

 Audio Codec

— Stereo headphone DAC with 99 dB SNR — Stereo ADC with 85 dB SNR — Stereo headphone amplifier with short-circuit protection and direct drive to eliminate bulky capacitors — Amplifiers are designed for click/pop free operation. — Two stereo line inputs — Microphone input — SPDIF digital out

 16-Channel Low-Resolution ADC

— 6 independent channels and 10 dedicated channels — Resistive touchscreen controller — Temperature sensor controller

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— Absolute accuracy of 1.3%

 Security Features

— Read-only unique ID for digital rights management algorithms — Secure boot using 128-bit AES hardware decryption — SHA-1 hashing hardware — Customer-programmed (OTP) 128 bit AES key is never visible to software.

 External Memory Interface (EMI)

— Provides memory-mapped (load/store) access to external memories — Supports the following types DRAM: — 1.8V Mobile DDR — Standard 2.5V DDR1

 Wide Assortment of External Media Interfaces

— High-speed MMC, secure digital (SD) — Hardware Reed-Solomon Error Correction Code (ECC) engine offers industry-leading protection and performance for NANDs. — Hardware BCH ECC engine allowing for up to 20-bit correction and programmable redundant area.

 Dual Peripheral Bus Bridges with 18 DMA Channels

— Multiple peripheral clock domains save power while optimizing performance. — Direct Memory Access (DMA) with sophisticated linked DMA command architecture saves power and off-loads the CPU.

 Highly Flexible Display Controller

— 8-bit data ITU-R BT.656 D1 digital video stream output mode (PAL/NTSC), with onthefly RGB to YCbCr color-space-conversion. — Flexible input formats

 Pixel Processing Pipeline (PXP)

— Provides full path from color-space conversion, scaling, alpha-blending to rotation without intermediate memory access — Bi-linear scaling algorithm with cropping and letterboxing — Alpha-blend, BITBLT, color-keying — Memory efficient block-based rotation engine

 Integrated TV-Out Support

— Integrated PAL/NTSC TV-encoder fully pipelined to display controller’s D1 resolution output stream — Integrated low-power 10-bit Video DAC (VDAC) for composite analog video output.

 Data Co-Processor (DCP)

— AES 128-bit encryption/decryption — SHA-1 hashing — High-speed memory copy

 Three Universal Asynchronous Receiver-Transmitters (UARTs)

— Two high-speed application UARTs operating up to 3.25 Mb/s with hardware flow control and dual DMA. — Debug UART operates at up to 115Kb/s using programmed I/O.

 I2C Master/Slave

— DMA control of an entire EEPROM or other device read/write transaction without CPU

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intervention

 Dual Synchronous Serial Ports (for SPI, MMC, SDIO, Triflash)

— 1-bit, 4-bit and 8-bit MMC/SD/SDIO modes — Compliant with SDIO Rev. 2.0 — SPI with single, dual and quad modes.

 Four-Channel 16-Bit Timer with Rotary Decoder  Five-Channel Pulse Width Modulator (PWM)  Real-Time Clock

— Alarm clock can turn the system on. — Uses the existing 24-MHz XTAL for low cost or optional low power crystal (32.768 kHz or 32.0 kHz), customer-selectable via OTP.

 Customer-Programmable One-Time-Programmable (OTP) ROM via Integrated eFuse Block

— Resistor-less boot mode selection — 128-bit boot mode crypto key — Boot mode specification of NAND characteristics for device that the customer is soldering to the board. This means no more costly delays waiting for new device support in t he boot ROM. — Fully software-programmable and accessible

 Flexible I/O Pins

— All digital pins have drive-strength controls — Most non-EMI digital pins have general-purpose input/output (GPIO) mode.

For comprehensive information on the microcontroller visit the Freescale’s web page for a datasheet.

At the moment of writing the microcontroller datasheet can be found at the following link:

http://www.freescale.com/files/dsp/doc/ref_manual/IMX23RM.pdf

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CHAPTER 5: CONTROL CIRCUITY

5. Introduction to the chapter

Here you can find information about reset circuit and quartz crystals locations, the power supply circuit is discussed.

5.1 Reset

OLinuXino's reset circuit includes R9 (47KΩ), R10 (47 Ω), T1, T2, Q1 and a RESET button. The RESET is specific for the fact that it is accomplished when the quartz is disconnected using 3.3V and the transistors T1 and T2.

5.2 Clock

24 MHz quartz crystal Q1 is connected to pins 121 and 122 of the iMX233 processor.

5.3 Power supply circuit

The board is powered by 5V supply and all measures listed below are taken at 5V external supply.

If measuring the current consumption it should be around 0.06A before initializing all the peripherals.

If you have successfully booted and powered the board the green LED1 will start blinking (you have to put a SD card with Linux image in the SD card holder).

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CHAPTER 6: CONNECTORS AND PINOUT

6. Introduction to the chapter

In this chapter are presented the connectors that can be found on the board all together with their pinout and notes about them. Jumpers functions are described. Notes and info on specific peripherals are presented. Notes regarding the interfaces are given.

6.1 Debugging interfaces

If you don't have a separate monitor or display around, and you don't wish to swap cables constantly with your personal computer using the debug interfaces provide better option for you OLinuXino experience.

There are three debugging options available on the OLinuXino. It is preferable to use one of the first two - UART or SJTAG but in case you want to use the classic 6-wire parallel JTAG there is an option explained below.

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6.1.1 UART debug

The first one is a debug UART interface – U_DEBUG. You can use our USB-SERIAL-CABLE for debugging via the UART.

In order to avoid SD card malfunction, when using the USB-SERIAL-CABLE-F with OLinuXino-MICROit is advisable to first insert the iMX233-OLinuXino-SD card and then power the board (if using battery also press the PWR button). Wait 4-5 seconds and then connect the USB-SERIAL-CABLE-F.

Please also check “2.4 Powering the board” for detailed info.

Note on how to use the U_DEBUG with USB-SERIAL-CABLE-F which has RED GREEN BLUE wires GND=BLUE, RX(INPUT)=GREEN, TX(OUTPUT)=RED. You have to connect to OLinuXino-MICROU_DEBUG connector in this sequence:

BLUE wire to pin.3 (GND) GREEN wire to pin.2 (TX) RED wire to pin.1 (RX)

U_DEBUG

Pin # Signal Name Processor Pin #

1 PWM0/DUART_RXD 125

2 PWM1/DUART_TXD 126

3 GND 30, 35, 98, 105, 112, 118

4 DEBUG 84

You can also check the pin names at the bottom of the board under the U_DEBUG header.

6.1.2 SJTAG debug

The second interface is the Serial JTAG (SJTAG) one-wire interface. It works with various external JTAG debugger dongles through a Freescale-defined FPGA/CPLD. SJTAG supports the Green Hills Slingshot and ETM probe debugger dongles, as well as those made by ARM, Abatron, and Lauterbach.

Note that the SJTAG interface comes without plastic header mounted.

The HW_DIGCTL_CTRL_USE_SERIAL_JTAG bit in the digital control block selects whether the one-wire serial JTAG interface or the alternative six-wire parallel JTAG interface is used. There are other options in the digital control block which might interest you and our advice is to check the

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iMX233's datasheet released by Freescale.

SJTAG

Pin # Signal Name Processor Pin #

1 3.3VREG -

2 GND 30, 35, 98, 105, 112, 118

3 SJTAG_PSW 119

4 DEBUG 84

The pin names are also written at the bottom of the board for your convenience.

6.1.3 Classic JTAG debug

The third option is to use the classic 6-pin parallel JTAG (not including GND and VCC). There are pads left for this option at the bottom of the board under the SD card holder. They are named individually and framed near a “JTAG” name.

The important thing is that these pins are multiplexed with the SD card signals. In order to use the 6-pin JTAG you will have to stop using the SD card. Note also that the classic JTAG interface comes without plastic header mounted so in order to use it you will need to use wires for connection.

Consider the the software settings required to switch from SJTAG to 6-pin JTAG and vice verse referring to the iMX233 manual. For instance:

The HW_DIGCTL_CTRL_USE_SERIAL_JTAG bit in the digital control block selects whether the serial JTAG interface or the alternative six-wire parallel JTAG interface is used.

HW_DIGCTL_CTRL_USE_SERIAL_JTAG - 0x0 - Selects whether the one-wire serial JTAG interface or the alternative six-wire parallel JTAG interface is used. 0 = Parallel six-wire JTAG is enabled and is mapped to a collection of module pins that must be enabled by programming their MUXSEL bits in the pin control block. 1 = Serial JTAG is enabled and uses the dedicated DEBUG pin. The ROM bootcode writes this field prior to enabling JTAG, selecting which type of JTAG pin signaling to use. OLD_JTAG = 0x0 Use six-wire parallel JTAG mode. SERIAL_JTAG = 0x1 Use one-wire serial JTAG mode.

It is good idea to check the datasheet of the iMX233 processor for all the options in the digital control block. The processor's datasheet should be always the first piece of paper you consult when dealing with electronics.

Page 25 of 47

Classic JTAG (multiplexed with SD card)

Pin # Signal Name Processor Pin #

1 SSP1_DATA1 85

2 SSP1_DATA0 84

3 GND 30, 35, 98, 105, 112, 118

4 SSP1_SCK 90

5 SD_VCC -

6 SSP1_CMD 83

7 SSP1_DATA3 87

8 SSP1_DATA2 86

Notice that the pad numeration is written at the bottom of OLinuXino-MICROunder the microSD card connector. Please check the manual part for microSD card for a schematic of the pins.

Page 26 of 47

6.2 SD/MMC slot

The microSD card slot is a standard 8pin connector.

We have tested a number of microSD cards on the OLinuXino boards and all of them worked fine regardless manufacturer or capacity. However, keep in mind that some of the lower quality microSD cards might draw too much current from the slot which might cause power-state problems. If you suspect the microSD card is causing problems please try using another one of better quality for better results.

microSD card connector

Pin # Signal Name Processor Pin #

1 SSP1_DATA2 86

2 SSP1_DATA3 87

3 SSP1_CMD 83

4 SD_VCC -

5 SSP1_SCK 90

6 GND 30, 35, 98, 105, 112, 118

7 SSP1_DATA0 84

8 SSP1_DATA1 85

Notice that the pad numeration is written at the bottom of OlinuXino-MICRO under the microSD card connector.

When removing the card, please make sure that you release it from the connector by pushing and NOT by pulling the card directly (this can damage both the connector and the microSD card).

Page 27 of 47

6.3 UEXT connector

OLIMEX offers board extensions which can be connected via UEXT interface. OLinuXino-MICRO board lacks UEXT connector but it can be formed using the signals on the CON2 pad line. You can check which signals you need in the CON1 and CON2 chapter.

For more information on UEXT please visit:

http://www.olimex.com/dev/OTHER/UEXT.pdf

*Note the two jumpers PIN29/SOFT_CL – PIN22/LCD_EN/I2C_SCL, and PIN28/SOFT_SDA3 – PIN21/LCD_HSYNC/I2C_SDA which by default are set to a software I2C. They can be used to set the whole UEXT to a hardware I2C.

Note that the correct way of connecting modules to the UEXT is:

1. Plug module to host board via UEXT

2. Power host board If you first power the board and then establish the UEXT it is possible host-board restarting to occur due to the fact that some modules have large capacitors on the power line.

Page 28 of 47

UEXT connector

Pin # Signal Name Processor Pin #

1 +3.3VREG -

2 GND 30, 35, 98, 105,

112, 118

3 AUART1_TXD 127

4 AUART1_RXD 128

5 I2C_SCL 34(default) OR 11*

6 I2C_SDA 31(default) OR 15*

7 PIN9/LCD_D08/SSP2_MISO 22

8 SSP2_MOSI 21

9 SSP2_SCK 33

10 PIN12/LCD_D11/UEXT_CS 25

6.4 CON1 and CON2 pads

The GPIO pins are led out to CON1 and CON2 pads situated on the both sides of the board. They allow the user to attach additional hardware, check readings or perform hardware debug. The “Pin#” column shows connector number and does NOT represent the naming on the bottom of the board. The table is divided into two big columns and explains the pin of both the connectors CON1 and CON2.

There are three color sections in the table below. Each color represents signals needed to establish a specific connection and functionality like in the MAXI and the MINI versions of the board. The GREEN section (CON2 – Pin#3 to Pin#11) marks the signals needed to make UEXT (check the schematics of OLinuXino-MAXI or OLinuXino-MINI or the UEXT section above for further help). The YELLOW section (CON2 - Pin#12 to Pin#15) marks the signals needed to build SJTAG. The BLUE section (CON2- Pin#16 to Pin#21) shows the signals needed for audio in and audio out.

Page 29 of 47

GPIO connector hardware

CON1 CON2

Pin# Signal Name Processor pin# Pin# Signal Name Processor pin#

1 +5VEXT 102 1 +5VEXT 102

2 GND

-

2 GND

-

3 PIN1/LCD_D00 2 3 3.3V_REG -

4 PIN2/LCD_D01 3 4 GND

30, 35, 98, 105, 112, 118

5 PIN3/LCD_D02 4 5 AUART1_TXD 127

6 PIN4/LCD_D03 5 6 AUART1_RXD 128

7 PIN5/LCD_D04 6 7 I2C_SCL 11 or 34

8 PIN6/LCD_D05 7 8 I2C_SDA 15 or 31

9 PIN7/LCD_D06 8 9

PIN9/LCD_D08/ SSP2_MISO

22

10 PIN8/LCD_D07 9 10 SSP2_MOSI 21

11 PIN9/LCD_D08 22 11 SSP2_SCK 33

Pin# Signal Name Processor pin# Pin# Signal Name Processor pin#

12 PIN10/LCD_D09 23 12 CS_UEXT_GPIO 25 or 32

13 PIN11/LCD_D10 24 13 PWM0_DUART_RXD 125

14 PIN12/LCD_D11 25 14 PWM1_DUART_TXD 126

15 PIN13/LCD_D12 27 15 SJTAG_PSW -

16 PIN14/LCD_D13 26 16 HPL 113

17 PIN15/LCD_D14 29 17 HPR 109

18 PIN16/LCD_D15 28 18 HPVGND 111

19 PIN17/LCD_D16 19 19 LIN1_INL 115

20 PIN18/LCD_D17 20 20 LIN1_INR

114

21 PIN19/LCD_D18 17 21 PIN34/MIC

116

22 PIN20/LCD_D19 16 22 PIN33/LRADC0

108

23 PIN21/LCD_D20 15 23 PIN32/LRADC10

107

24 PIN22/LCD_D21 11 24 PIN31

82

Page 30 of 47

25 PIN23/LCD_D22 12 25 PIN30

81

Pin# Name Processor pin# Pin# Name Processor pin#

26 PIN24/LCD_D23 13 26 PIN29

34

27 PIN25/LCD_D23 14 27 PIN28

31

28 PIN26/LCD_D23 10 28 PIN27

91

29 GND - 29 GND

-

30 3.3V - 30 BAT

100; 103

The hardware is associated differently in the Linux following the GPIO naming conventions suggested in the iMX233 datasheet. You can check the connection between Linux naming of the pin, Olimex naming of the pin and the consecutive connector pin number in the table below. The ones filled with “Not implemented” doesn't have Linux support by the time of writing and will be updated overtime. “Linux GPIO” is the one you should use in Linux (the one in the datasheet); “OLinuXino name” is the pin as written on the bottom of the board. ”OLinuXino GPIO Connector #” is the consecutive number of pins with BAT being Pin#1 and GND#40. Note that if “OLinuXino Name” starts with P and then is followed by a number X, the PX is the name written on the bottom of the board (under the connector) with white ink. If “OLinuXino Name” is other text it is a signal used for the hardware of the board but still can be controller by the Linux (it can't be found at the GPIO connector though).

The Linux implementation of pins

Linux GPIO/iMX 233 GPIO

OLinuXino Name

OLinuXino CON

pad #

Linux GPIO/iMX 233 GPIO

OLinuXino

Name

OLinuXino CON

pad #

0 PIN9 CON1#11 32 to 39

Not

implemented

Not

implemented

1 PIN10 CON1#12 51 PIN25 CON1#27

2 PIN11 CON1#13 52 PIN24 CON1#26

3 PIN12 CON1#14 53 PIN26 CON1#28

4 PIN13 CON1#15 55 PIN22 CON1#24

5 PIN14 CON1#16 56 PIN21 CON1#23

6 PIN15 CON1#17 64

JTAG_TDO1

SSP1_CMD

Not

implemented

7 PIN16 CON1#18 65 LED1

Not

implemented

16 PIN17 CON1#19 91 PIN30 CON2#25

17 PIN18 CON1#20 92 PIN31 CON2#24

Page 31 of 47

19 TEST_PAD Not implemented

20 UEXT_SPI2_MOSI CON1#11, CON2#9

23 PIN29 CON2#26

24 UEXT_SPI2_SCK Not implemented

25 PIN28 CON2#27

30 UEXT_TX1 Not implemented

31 UEXT_RX1 Not implemented

Below is the schematic of GPIO_CON:

You can see the signals needed to form UEXT connector, SJTAG debug interface and audio interface marked with purple. Thanks to David Whittaker some of the above information can be found in compact variant at, a table he compiled: https://docs.google.com/spreadsheet/ccc?

key=0AspkrcYcY5bWdFB6WC1xRlp5bFRjc1hwVnlQZDVmeUE

Page 32 of 47

6.5 USB HOST

The USB hosts and the Ethernet are controller by the iMX233 controller.

Important! The USB of OLinuXino-Micro can communicate directly only with High-speed or Fullspeed USB devices. The majority of keyboards and mice are low-speed devices.

A good solution for plugging a keyboard or a mouste to the Micro is to use a USB hub between your device and OLinuXino-Micro - using such a hub has the additional benefit of providing additional USB slot (which can be used for example to mount flash memories etc.).

The signals follow the familiar and standard USB host pattern:

USB 2-level host

PIN# SIGNAL NAME

1 +5V_HOST_PWR

2 USB_DM

3 USB_DP

4 GND

6.6 PWR Jack

The power jack used is the typical 2.5mm one used by Olimex in most of our products. You should provide 5 volts at 1A maximum to the board.

Pin # Signal Name

1 Power Input

2 GND

More info about the power supply can be found in chapter 5 of this manual

Page 33 of 47

6.7 Headphones and line-in connector

The audio connectors are not mounted on OLinuXino-MICRO, but the signals needed can be found on CON2 connector. Check the CON1 and CON2 section for further info.

6.8 Composite video connector

The composite video is the connector you should use if you wish OLinuXinoMICRO video output on a monitor.

The signal is controlled by pin #104 from the i.MX233 processor.

The + signal is lead to the middle of the connector. The outside part is the GND.

6.9 Boot mode positions

The iMX233 can boot the operating system from different locations. The default location for the Linux files we used is the microSD card. There are 4(four) jumpers responsible for the boot location: D03, D02, D01 and D00. They are located on the top of the board between the processor and 40pin GPIO connector. Note that the jumpers are SMD type and opening a jumper would require cutting, closing a jumper would require soldering. To be able to do the quoted operations you will need basic engineering skills and experience. You can check below the table or the schematic for the correct positions. Value of “1” means the jumper is closed.

BOOT MODE D03 d02 d01 d00

USB 0 0 0 0

3.3V I2C Master 0 0 0 1

33.3V SPI Flash 1 Master 0 0 1 0

3.3V SPI Flash 2 Master 0 0 1 1

Page 34 of 47

3.3V NAND 0 1 0 0

Start up waits for JTAG

debugger connection

0 1 1 0

3.3V SD/MMC 1 (Default !!!) 1 0 0 1

3.3V SD/MMC 2 1 0 1 0

6.10 Jumper description

Please note that all the jumpers on the board are SMD type. If you feel insecure of your soldering/cutting technique it is better not to try to adjust the jumpers.

6.10.1 SCL_SW/SCL_HW and SDA_SW/SDA_HW

Those two jumpers must be moved together – there are two available options – configuring software I2C interface (both SCL_SW, SDA_SW closed) or hardware I2C interface (both SCL_HW, SDA_HW closed).

The default position is SCL_HW/SDA_HW closed (soldered).

6.10.2 5V_E

The 5V_E jumper allows control over the powering line. If you want to disable the 5V powering line open 5V_E jumper.

The default position is closed.

6.10.3 3.3V_E jumper

3.3V_E jumper is open by default. If closed (soldered) provides 3.3V at the pin 30 of CON1.

The default position is open.

6.10.4 Boot mode selecting jumpers

The boot mode is discussed in chapter 6.11 of this manual.

6.11 Additional hardware components

The components below are mounted on OLinuXino but are not discussed above. They are listed here for completeness:

Reset button – used for hardware reset of the board

Page 35 of 47

Power button – when Linux is running pressing PWR_BUT will put the board in low power mode; when powered by battery PWR_BUT is used to initially power up the board – and pressing the board again after it is powered will put it low power mode

Recovery button (REC) – when the board is put to sleep REC can be used to “wake-up” the board

512 (32M x 16) MBit DDR SDRAM - the exact memory used at the moment of writing is Xylinx

HY5DUxxxyyy

LED1

6.12 Accessories

Here you will find additional information for Olimex products you can use with OlinuXino-MICRO

6.12.1 USB-SERIAL-CABLE-F

The cable for the U_DEBUG interface that can be purchased for additional cost has three cables. It is important to specify in your purchase order whether you want the USB-SERIAL-CABLE-F variant with male of female connectors. The wires follow the following color pattern GND=BLUE, RX(INPUT)=GREEN, TX(OUTPUT)=RED.

You will need a drivers that can be downloaded from the page of USB-SERIAL-CABLE:

https://www.olimex.com/Products/Components/Cables/USB-Serial-Cable/USB-Serial-Cable-F/.

Page 36 of 47

CHAPTER 7: BLOCK DIAGRAM AND MEMORY

7. Introduction to the chapter

On the next page you can find a memory map for this family of processors. It is strongly recommended to refer to the original datasheet released by Freescale for one of higher quality.

7.1 Memory addresses

Below is the table with some of the most frequently used addresses. For full list of addresses check the manual released by Freescale (Chapter Memory Map).

Decode block

Device Mnemonic Start address End address Size

AHB On-chip RAM OCRAM 0x00000000 0x00007FFF 32KB

On-chip RAM alias OCRAM 0x00008000 0x3FFFFFFF

External memory 0x40000000 0x5FFFFFFF 512MB

Default Slave 0x60000000 0x7FFFFFFF 512M

Page 37 of 47

7.2 Processor block diagram

Page 38 of 47

7.3 Physical memory map

Page 39 of 47

CHAPTER 8: SCHEMATICS

8. Introduction to the chapter

In this chapter are located the schematics describing logically and physically OLinuXino.

8.1 Eagle schematic

OLinuXino schematic is visible for reference here. You can also find them on GitHub page for OLinuXino at our site: https://www.olimex.com/Products/OLinuXino/iMX233/iMX233-

OLinuXino-MICRO/. The link to the GitHub is located in HARDWARE section.

The EAGLE schematic is situated on the next page for quicker reference.

Page 40 of 47

Page 41 of 47

Iset = 6800/R3

Iset = 680mA

UEXT

DEBUG

AUDIO

Only 5V powe r supply!! !!!

Open

Close

22uF/6.3V 22uF/6.3V

22uF/6.3V

100nF

22uF/6.3V

100nF

22uF/6.3V

100nF

22uF/6.3V

100nF

22uF/6.3V

100nF

22uF/6.3V

100nF

22uF/6.3V

100nF

33pF

100nF

1uF

22uF/6.3V 22uF/6.3V

22uF/6.3V

100 nF

100nF

100 nF

22uF/6.3V

100nF

22uF/6.3V

10pF

NA(10pF)

22uF/6.3V

100uF/1 6V/LOWESR /105C/6. 3x11mm _RM2. 5

47pF

220uF/10V/10 5C

220uF/10V/1 05C

VIDEO_CON

NA(HN1X30) NA(HN1X30)

CS_SW:Ope n/CS_HW :Close

Close

Open

1N5819/SS14

Open

BAT54S

Close

SMBJ 6.0A

NA(IRLML6402)

NA(WU08S)

22uH/1.5A/YS75/7x8mm

FB0805/600R/2A

FB0805/600R/200mA(201209-601)

CL470nH/0805/1.76R/250mA

GREEN(0603)

+5VEXT

2.5V

BAT

+5VEXT

BAT

2.5V

+5VEXT

T1107A(6x3,8x2,5mm)

YDJ-1136

Q24.000 MHz/HC-49SM /SMD/20 ppm/ 20pF

0R(Board_M ounted )

2.2k

10k 10k

10k

0R(Board_M ounte d)

1k/1%

2.2k

2.2k 2.2k47k

NA(47k)

47k

10k

NA(120R)

1k/1%

1k/1 %

1M

10k

47k

NA(47k)

0R(Board_M ounte d)

T1107A(6x3,8x2,5mm)

RA1206 _(4X0603 )_4B8_ 100K

RA1206_ (4X0603 )_4B8_1 00K

RA1206_(4 X0603 )_4B8_4 7K

RA1206 _(4X060 3)_4B8_ 4.7K

SCL_HW: Open/SC L_SW:C lose

MICRO

SDA_HW:Open /SDA_S W:Close

(NA)HN1X4

BC846B

NA(DTA114YKA)

NA(DTC114YKA)

HY5DU121622D(L)T(P)-J

USB_A

NA(HN1X4)

3.3V

3.3V_REG

3.3V

3.3V_REG

3.3V

AP1231-33

+5V_HOST_PWR

A0

A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

AUART1_RXD AUART1_RXD AUART1_TXD

AUART1_TXD

BA0

BA1

CASN

CKE

CLK

CLK CLKN

CLKN

CS

CS_UEXT

CS_ UEXT

CS_UEXT _GPIO

CS_UEXT_GPIO

D0

D1

D2

D3

D4

D5

D6

D7

D8

D9

D10

D11

D12

D13

D14

D15

DCDC_VDDA

DCDC_VDDD

DEBUG

DEBUG DEBUG

DQM0

DQM1

DQS0

DQS1

GND

HPL

HPR

HP_VGND

I2C_SCL

I2C_SDA

LED1

LIN1_INL

LIN1_INR

PIN1/LCD_D00

PIN2/LCD_D01

PIN3/LCD_D02

PIN4/LCD_D03

PIN5/LCD_D04

PIN6/LCD_D05

PIN7/LCD_D06

PIN8/LCD_D07

PIN9/LCD_D08/SSP2_MISO

PIN10/LCD_D09

PIN11/LCD_D10

PIN12/LCD_D11

PIN1 2/L CD_ D11

PIN13/LCD_D12

PIN14/LCD_D13

PIN15/LCD_D14

PIN16/LCD_D15

PIN17/LCD_D16

PIN18/LCD_D17/USB_EN

PIN19/LCD_DOTCLK

PIN20/LCD_VSYNC

PIN21/LCD_HSYNC/I2C_SDA

PIN22/LCD_EN/I2C_SCL

PIN23/LCD_DISP

PIN24/LCD_WR

PIN25/LCD_RS

PIN26/LCD_CS

PIN26/LCD_CS PIN27/PWM2

PIN27/PWM2

PIN28/SOFT_SDA

PIN28/SOFT _SDA

PIN28/SOFT_SDA

PIN29/SOFT_SCL

PIN30

PIN31

PIN32/LRADC1

PIN33/LRADC0

PIN34/MIC

PSWITCH

PWM0/DUART_RXD

PWM1/DUART_TXD

RASN

RESET

SD_VCC SD_VCC

SJTAG_PSW

SSP1_CMD

SSP1_CMDSSP1_CMD

SSP1_CMD

SSP1_DATA0

SSP1_DATA0SSP1_DATA0

SSP1_DATA0

SSP1_DATA1

SSP1_DATA1SSP1_DATA1

SSP1_DATA1

SSP1_DATA2

SSP1_DATA2SSP1_DATA2

SSP1_DATA2

SSP1_DATA3

SSP1_SCK

SSP2_MOSI

SSP2_SCK

USB_DM

USB_DP

VDDXTAL

WEN

XTALI

XTALO

12

3.3V_E

1 2

5V_E

C1 C2

C3

C4

C5

C6

C7

C8

C9

C10

C11

C12

C13

C14

C15

C16

C17

C18

C19

C20

C21

C22

C23

C24

C25

C26

C27 C28

C29

C30

C31

C32

C33

C34

C35

C36

C37

C38

C39

C40

C41

C42

C43

C44

C45

C46

C47

C48

C49

C50

C51

COMPOSITE_VIDEO

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

CON1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

CON2

1

2

3

CS_ SW/C S_H W

12

D00_H

12

D01_H

D1

12

D02_H

D2

12

D03_H

D3

FET1

1

2

3

4

5

6

7

8

JTAG

L1

L2

L3

L4

LED1

POWER

PWR

Q1

R1

R2

R3 R4

R5

R6

R7

R8

R9

R10

R11 R12R13

R14

R15

R16

R17

R18

R19

R20

R21

R22

R25

R26

RECOVERY

RESET

RM1G1

RM1G2

RM1G3

RM1G4

RM2

RM3

123

SCL_HW/SCL_SW

CD/DAT3/CS

2

CLK/SCLK

5

CMD/DI

3

DAT0/DO

7

DAT1/RES

8

DAT2/RES

1

VDD

4

VSS

6

SD

123

SDA_HW/SDA_SW

1 2 3 4

SJTAG

T1

T2

T3

T4

BATT

103

DCDC_BATTERY

100

DCDC_GND

98

DCDC_LN1

97

DCDC_LP

99

DCDC_VDDA

96

DCDC_VDDD

94

DCDC_VDDIO

95

DEBUG

89

EMI_A00

76

EMI_A01

75

EMI_A02

74

EMI_A03

73

EMI_A04

72

EMI_A05

71

EMI_A06

70

EMI_A07

69

EMI_A08

68

EMI_A09

67

EMI_A10

66

EMI_A11

65

EMI_A12

64

EMI_BA0

79

EMI_BA1

80

EMI_CASN

61

EMI_CE0N

63

EMI_CKE

78

EMI_CLK

36

EMI_CLKN

37

EMI_D00

41

EMI_D01

43

EMI_D02

42

EMI_D03

44

EMI_D04

47

EMI_D05

48

EMI_D06

49

EMI_D07

50

EMI_D08

51

EMI_D09

52

EMI_D10

54

EMI_D11

55

EMI_D12

57

EMI_D13

58

EMI_D14

60

EMI_D15

59

EMI_DQM0

46

EMI_DQM1

56

EMI_DQS0

39

EMI_DQS1

40

EMI_RASN

62

EMI_WEN

77

GPMI_ALE/LCD_D17

20

GPMI_CE0N

82

GPMI_CE1N

81

GPMI_CLE/LCD_D16

19

GPMI_D00/LCD_D08/SSP2_DATA0

22

GPMI_D01/LCD_D09/SSP2_DATA1

23

GPMI_D02/LCD_D10/SSP2_DATA2

24

GPMI_D03/LCD_D11/SSP2_DATA3

25

GPMI_D04/LCD_D12/SSP2_DATA4

27

GPMI_D05/LCD_D13/SSP2_DATA5

26

GPMI_D06/LCD_D14/SSP2_DATA6

29

GPMI_D07/LCD_D15/SSP2_DATA7

28

GPMI_RDN

31

GPMI_RDY0/SSP2_DETECT

32

GPMI_RDY1/SSP2_CMD

21

GPMI_WPN

34

GPMI_WRN/SSP2_SCK

33

HPL

113

HPR

109

HP_VGND

111

I2C_SCL/GPMI_RDY2/AUART1_TX

127

I2C_SDA/GPMI_CE2N/AUART1_RX

128

LCD_CS

10

LCD_D00

2

LCD_D01

3

LCD_D02

4

LCD_D03

5

LCD_D04

6

LCD_D05

7

LCD_D06

8

LCD_D07

9

LCD_DOTCK/GPMI_RDY3

17

LCD_ENABLE/I2C_SCL

11

LCD_HSYNC/I2C_SDA

15

LCD_RESET/GPMI_CE3N

12

LCD_RS

14

LCD_VSYNC/LCD_BUSY

16

LCD_WR

13

LINE1_INL

115

LINE1_INR

114

LRADC0

108

LRADC1

107

MIC

116

PSWITCH

119

PWM0/ROTARYA/DUART_RX

125

PWM1/ROTARYB/DUART_TX

126

PWM2/GPMI_RDY3

91

SSP1_CMD/SPI1_MOSI/JTAG_TDO

83

SSP1_DATA0/SPI1_MISO/JTAG_TDI

84

SSP1_DATA1/I2C_SCL/JTAG_TCLK

85

SSP1_DATA2/I2C_SDA/JTAG_RTCK

86

SSP1_DATA3/SPI1_SS#/JTAG_TMS

87

SSP1_DETECT/GPMI_CE3N/USB_ID

88

SSP1_SCK/SPI1_SCK/JTAG_TRST

90

USB_DM

123

USB_DP

124

VAG

117

VDAC1

104

VDD4P2

101

VDD5V

102

VDDA1

110

VDDD1

1

VDDD3

93

VDDIO33_1

18

VDDIO33_3

92

VDDIO_EMI1

45

VDDIO_EMI2

53

VDDIO_EMIQ

38

VDDM/LRADC4

106

VDDXTAL

120

VSSA1

112

VSSA2

118

VSSA4

105

VSSD1

30

VSSD2

35

XTALI

122

XTALO

121

U1

MCIMX233CAG4C

#CAS

22

#CK

46

#CS

24

#RAS

23

#WE

21

A0

29

A1

30

A2

31

A3

32

A4

35

A5

36

A6

37

A7

38

A8

39

A9

40

A10/AP

28

A11

41

A12

42

BA0

26

BA1

27

CK

45

CKE

44

DQ0

2

DQ1

4

DQ2

5

DQ3

7

DQ4

8

DQ5

10

DQ6

11

DQ7

13

DQ8

54

DQ9

56

DQ10

57

DQ11

59

DQ12

60

DQ13

62

DQ14

63

DQ15

65

LDM

20

LDQS

16

NC1

14

NC2

17

NC3

19

NC4

25

NC5

43

NC6

50

NC7

53

UDM

47

UDQS

51

VDD1

1

VDD2

18

VDD3

33

VDDQ1

3

VDDQ2

9

VDDQ3

15

VDDQ4

55

VDDQ5

61

VREF

49

VSS1

34

VSS2

48

VSS3

66

VSSQ1

6

VSSQ2

12

VSSQ3

52

VSSQ4

58

VSSQ5

64

U2

EN

4

GND

2

IN

5

ISET

3

OUT

1

U3SY6280

1 2 3 4

USB_HOST

1 2 3 4

U_DEBUG

CE

3

VIN

1

VOUT

5

VSS

2

VR1

iMX233-OLinuXino-Micro_revision_B1 O LIMEX LTDhttps://www.olimex.com

+

G S

D

0R

R1R2R3

R4

R1

R2

R3

R4

10k

47k

10k

47k

USB

SHIELD

POWER SUPPLY CIRCUIT

Place T1 and T2 as close as

possible to Q1

Reset Circuit

512Mb DDR SDRAM (32Mx16)

MicroSD

Composite Video

POWER/REC Button

BOOT MODE SELECT

UEXT -> GPIO

BOOT MODE SELECT: LCD DATA

BOOT MODE D03 D02 D01 D00

0 0 0 0USB

3.3V I2C Master

3.3V SPI Flash 1 Master

3.3V SPI Flash 2 Master

3.3V NAND

Startup wai ts for JTA G debu gger con nectio n

3.3V SD/MMC 1 (Default !!!)

3.3V SD/MMC 2

0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 1 0 1 0 0 1 1 0 1 0

LCD_RS must to be pulled

High to enabl e Resistor Boo t Mod e. If pull ed lo w, the i .MX23 3 wil l attempt to boo t from O TP.

GPIO

Debug: UART or SJTAG

USB-HOST

8.2 Physical dimensions

Note that all dimensions are in mills.

Additionally, the three highest elements on the board in order from the tallest to the shortest are (dimensions without the PCB thickness):

1. Composite video connector: 490 mil

2. C50/C51: 480 mil

3. C48: 470mil

Page 42 of 47

CHAPTER 9: REVISION HISTORY AND SUPPORT

9. Introduction to the chapter

In this chapter you will find the current and the previous version of the document you are reading. Also the web-page for your device is listed. Be sure to check it after a purchase for the latest available updates and examples.

9.1 Document revision

Revision Changes Modified Page#

A,

05.07.12

Initial Creation All

B,

17.07.12

Added notes on USB compatibility 8, 33

C,

18.07.12

Added info about fuse programming 10, 11

D,

20.07.12

4 – Added links to all indexes 40 – Added info about USB-SERIAL-CABLE 48 – Fixed typo about the power supplies

4, 40, 48

E,

24.07.12

9 – wrong powering information fixed 22,23 – wrong power supply information fixed 37 – REC, Reset fixed

9, 22,23, 37

F,

12.09.12

3,4 – Edited the index 10 – Added info about ArchLinux 33 – Added link to a cheat sheet 42 – Updated the schematic

3, 4, 10, 33, 42

Continues on next page

Page 43 of 47

Continued from previous page

Revision Changes Modified Page#

G,

01.10.12

29 – Fixed error about GPIO connectors 46 – Added info about a random hang-up problem caused by R17 47 – Link updates

29, 46, 47

H,

04.10.12

14 – Added short redirection info about ArchLinux setup 28 – UEXT connection important info added 32 – Fixed error in pinout table (PIN 29 from CON1 is GND)

14, 28, 32

I,

29.10.12

18, 19, 20 – Fixed wrong info about the

LQFP128 package of iMX233

18, 19 , 20

J,

04.01.12

10 – Wrong picture and description of the fuse burning algorithm

10

K,

21.03.12

6 – fixed the voltages for -MINI and -MAXI in the comparison table 34 – removed left-over battery connector explanation 35 – jumpers positions adjusted based on design 36 – memories names updated Various – updated a couple of links

6, 34, 35, 36, 45

Page 44 of 47

9.2 Board revision

Revision Notable Changes

B Initial release of the board

B1

Removed termination R17 (120R) after first batch of boards which was causing memory lock-ups

B2

Capacitors C23 and C24 changed from 33pF to 15pf due to occasional initial power hang-ups.

C

1. Changed pull-up resistor of the RX line to 4.7k and BAT54C is added on the same line.

2. SW_SCL/HW_SCL i SW_SDA/HW_SDA jumpers got changed to default hardware.

3. SD card is changed from TFR-MEM-COM to TFC-WXCII00-08-LF and the connector is moved towards the middle of the board

Important note about owners of revision B of the board: if you are one of the first owners of iMX233-OLinuXino-Micro and you experience random hang-ups (Kernel oops, Kernel panic) it is recommended to unsolder/remove R17 (check the schematic or the board file to locate it easier). Removing R17 fixes the random lock-up.

This problem has been fixed in revision B1 of the board.

Page 45 of 47

9.3 Useful web links and purchase codes

The web page you can visit for more info on your device is http://www.olimex.com/dev/imx233-

olinuxino-maxi.html and https://www.olimex.com/wiki/IMX233

The forum for general questions and FAQ: https://www.olimex.com/forum/ You can get the latest updates on the software at: https://github.com/OLIMEX/OLINUXINO (please check the readme at the bottom). The OLinuXino Linux images sources: https://github.com/Freescale/fsl-community-bsp-platform.

ORDER CODES:

iMX233-OLinuXino-MICRO– tiny in size, tiny in price and perfect for breadbording iMX233-OLinuXino-MINI – the mini version of the single-board computer iMX233-OLinuXino-MAXI – the best version of OLinuXino featuring Ethernet controllert

iMX233-OLinuXino-MINI-WIFI – the MINI version of OLinuXino + embedded RTL8128CU

WIFI module

iMX233-OLinuXino-SD - SD card with the Linux image which can be used with every board from the OLinuXino family

MOD-WIFI_RTL8188 – external USB WIFI modem with RTL8188 chip USB-SERIAL-CABLE - USB serial console cable for U_DEBUG SY0612E - power supply adapter 12V/0.5A for iMX233-OLinuXino-MICRO and iMX233-

OLinuXino-MINI (Will not work with OLinuXino-MICRO) SY0605E - power supply adapter 5V/1A for iMX233-OLinuXino-MICRO (Will not work with iMX233-OLinuXino-MAXI and iMX233-OLinuXino-MINI)

How to order? You can order directly from the web-site or from any of our distributors.

Please visit https://www.olimex.com/ for more info. The full list of distributors can be found here: https://www.olimex.com/Distributors/.

Page 46 of 47

9.3 Product support

For product support, hardware information and error reports mail to: support@olimex.com. Note that we are primarily a hardware company and our software support is limited.

Please consider reading the paragraph below about the warranty of Olimex products.

Warranty and returns:

Our boards have lifetime warranty against manufacturing defects and components.

During development work it is not unlikely that you can burn your programmer or development board. This is normal, we also do development work and we have damaged A LOT of programmers and boards during our daily job so we know how it works. If our board/programmer has worked fine then stopped, please check if you didn't apply over voltage by mistake, or shorted something in your target board where the programmer was connected etc. Sometimes boards might get damaged by ESD shock voltage or if you spill coffee on them during your work when they are powered.

Please note that warrany do not cover problems caused by unproper use, shorts, over-voltages, ESD shock etc.

If the board has warranty label it should be not broken. Broken labels void the warranty, same applies for boards modified by the customer, for instance soldering additional components or removing components - such boards will be not be a subject of our warranty.

If you are positive that the problem is due to manufacturing defect or component you can return the board back to us for inspection.

When we receive the board we will check and if the problem is caused due to our fault and we will repair/replace the faulty hardware free of charge, otherwise we can quote price of the repair.

Note that all shippings back and forth have to be covered by the customer. Before you ship anything back you need to ask for RMA. When you ship back please attach to it your shipping address, phone, e-mail, RMA# and brief description of the problem. All boards should be sent back in antistatic package and well packed to prevent damages during the transport.

Page 47 of 47

Olimex IMX233-OLINUXINO-MICRO User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

DISCLAIMER

CHAPTER 1: OVERVIEW

1. Introduction to the chapter

1.1 Features

1.2 The OLinuXino family

1.2 Target market and purpose of the board

1.3 Organization

CHAPTER 2: SETTING UP THE OLINUXINO BOARD

2. Introduction to the chapter

2.1 Electrostatic warning

2.3 Requirements

2.4 Powering the board

2.5 Prebuilt software

2.6 Using BitBurner

2.7 Building the Debian Linux image

2.8 How to blink the LED

2.9 How to setup Arch Linux distribution

2.10 How setup the I2C, SPI, UART

CHAPTER 3: OLINUXINO BOARD DESCRIPTION

3. Introduction to the chapter

3.1 Layout (top view)

3.2 Layout (bottom view)

CHAPTER 4: THE iMX233 MICROCONTROLLER

4. Introduction to the chapter

4.1 The microcontroller

CHAPTER 5: CONTROL CIRCUITY

5. Introduction to the chapter

5.1 Reset

5.2 Clock

5.3 Power supply circuit

CHAPTER 6: CONNECTORS AND PINOUT

6. Introduction to the chapter

6.1 Debugging interfaces

6.1.1 UART debug

6.1.2 SJTAG debug

6.1.3 Classic JTAG debug

6.2 SD/MMC slot

6.3 UEXT connector

6.4 CON1 and CON2 pads

6.5 USB HOST

6.6 PWR Jack

6.7 Headphones and line-in connector

6.8 Composite video connector

6.9 Boot mode positions

6.10 Jumper description

6.10.1 SCL_SW/SCL_HW and SDA_SW/SDA_HW

6.10.2 5V_E

6.10.3 3.3V_E jumper

6.10.4 Boot mode selecting jumpers

6.11 Additional hardware components

6.12 Accessories

6.12.1 USB-SERIAL-CABLE-F

CHAPTER 7: BLOCK DIAGRAM AND MEMORY

7. Introduction to the chapter

7.1 Memory addresses

7.2 Processor block diagram

7.3 Physical memory map

CHAPTER 8: SCHEMATICS

8. Introduction to the chapter

8.1 Eagle schematic

8.2 Physical dimensions

CHAPTER 9: REVISION HISTORY AND SUPPORT

9. Introduction to the chapter

9.1 Document revision

9.2 Board revision

9.3 Useful web links and purchase codes

9.3 Product support