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OLIMEX IMX233-MINI-WIFI [5/59] Chapter 1 overview
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OLIMEX© 2015 IMX233-OLinuXino-MAXI user's manual
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 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
• 3 USB High Speed Host
• optional WIFI RTL8188CU module
• Stereo Audio Input
• Stereo Headphones Audio Output
• two Buttons
• UEXT connector for connection of different peripherial modules
• 40 pin GPIO for connection of other hardware
• Board is in shape for fit inside Pactec JM42 plastic box
http://www.pactecenclosures.com/pdfs/drw_JM-42.pdf
• Power supply input 6-16VDC
• PCB dimensions: 3.70'' x 2.15'' (94.0mm x 54.6mm)
• Nominal dimensions: 3.70'' x 2.65'' (94.0mm x 67.3mm)
Page 5 of 59
Содержание
- Disclaimer 2
- Table of contents 3
- Chapter 1 overview 5
- Features 5
- Introduction to the chapter 5
- 100mbit ethernet for the wired network of olinuxino maxi 150mbit for the wifi following 811 2n standard 6
- 150 mbit ethernet 6
- 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 6
- Audio in connector 6
- Audio out connector 6
- Breadboarding 6
- Dc power supply 6
- Dimensions 6
- Gpio connector 6
- Of buttons 6
- 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 6
- Olinuxino nano olinuxino micro olinuxino mini olinuxino maxi 6
- Power jack 6
- Processor 6
- Ram mb 6
- Reset button 6
- Table of comparison 6
- The olinuxino family 6
- There is an easy access to the power pin holes however especially if you use a breadboard 6
- Uext connector 6
- Usb hosts 6
- Vga connector 6
- Organization 7
- Target market and purpose of the board 7
- Chapter 2 setting up the olinuxino board 8
- Electrostatic warning 8
- Introduction to the chapter 8
- Requirements 8
- Powering the board 9
- Prebuilt software 10
- Using bitburner 10
- Building the linux image 12
- Check the image below 13
- Created directory for the project and download the bsp source from the git repository 13
- 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 13
- Now to start building the image 13
- Olimex 2015 imx233 olinuxino maxi user s manual 13
- Page 13 of 59 13
- 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 13
- How to blink the led 14
- How setup the i2c spi uart 15
- How to setup arch linux distribution 15
- How to use a usb wifi dongle based on realtek rtl8188cus and 19
- Rtl8192cu under arch linux 19
- Chapter 3 olinuxino board description 24
- 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 24
- Introduction to the chapter 24
- Layout top view 24
- Chapter 4 the imx233 microcontroller 25
- Introduction to the chapter 25
- The microcontroller 25
- Chapter 5 control circuity 28
- Clocks 28
- Introduction to the chapter 28
- Power supply circuit 28
- Chapter 6 connectors and pinout 31
- Debugging interfaces 31
- Introduction to the chapter 31
- Sjtag debug 32
- Uart debug 32
- Classic jtag debug 33
- 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 34
- Notice that the pad numeration is written at the bottom of olinuxino maxi under the microsd card connector please check the manual part for microsd card for a schematic of the pins 34
- Notice that the pad numeration is written at the bottom of olinuxino maxi under the microsd card connector 35
- Sd mmc slot 35
- The microsd card slot is a standard 8pin connector 35
- 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 35
- Uext module 36
- Gpio general purpose input output 40pin connector 37
- The gpio pins are led out on a separate 40pin connecter they allow the user to attach additional hardware check readings or perform hardware debug the gpio pin column shows connector number and does not represent the naming on the bottom of the board 37
- The uext pinout is also printed at the bottom of the board under the connector 37
- 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 38
- Below you can find the gpio_con as seen in the schematic 39
- 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 39
- When looking at the bottom of olinuxino maxi near the gpio connector there is also an additional gnd pad named gnd_pin which is a fast way to have access to a ground signal 40
- Usb hosts 41
- Lan connector 42
- More info about the power supply can be found in chapter 5 of this manual 42
- Pwr jack 42
- The ethernet connectivity is handled by the lan9512 controller which also incorporates a usb module in it the signals found on the ethernet connector are listed in the table below 42
- The power jack used is the typical 2 mm one used by olimex in most of our products you should provide between 6 and 16 volts 1a to the board 42
- The two leds on the front side of the lan connector show the state of the ethernet the meaning behind the different states can be found in the table below 42
- Battery connector 43
- Headphones and line in connector 43
- Standard audio jack and phone jack are mounted for the audio interfacing 43
- The headphones resistance is 16 ohms 43
- The pins are also written on the top of the board in the base of the connector 43
- When using the battery connector keep in mind that it is an energy solution that wouldn t be able to power the board and all the peripherals the voltage of a 3 v lipo battery would be enough to power the processor and the memory but won t be enough to power the lan and the usb hosts 43
- Boot mode positions 44
- Composite video connector 44
- The composite video is the connector you should use if you wish olinuxino maxi video output on a monitor 44
- 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 44
- The signal is lead to the middle of the connector the outside part is the gnd 44
- The whole signal is controlled by pin 104 from the imx233 processor 44
- Jumper description 45
- Scl_sw scl_hw and sda_sw sda_hw 45
- Additional hardware components 46
- Boot mode selecting jumpers 46
- V_e and 3 vio_e jumpers 46
- Accessories 47
- Usb serial cable f 47
- 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 48
- Chapter 7 block diagram and memory 48
- Introduction to the chapter 48
- Memory addresses 48
- 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 48
- Processor block diagram 49
- Physical memory map 50
- Chapter 8 schematics 51
- Eagle schematic 51
- Introduction to the chapter 51
- Boot mode select 52
- Composite video 52
- Debug uart or sjtag 52
- Headphones and line in 52
- Mb ddr sdram 32mx16 52
- Microsd 52
- Olimex 2015 imx233 olinuxino maxi user s manual 52
- Page 52 of 59 52
- Phy usb hostx2 52
- Power rec button 52
- Power supply circuit 52
- Reset circuit 52
- Note that all dimensions are in inches 53
- Physical dimensions 53
- The three highest elements on the board in order from the tallest to the shortest are inductor l2 usb host connector ethernet lan connector 53
- Chapter 9 revision history and support 54
- Document revision 54
- 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 54
- Introduction to the chapter 54
- After some series changed c83 to 20pf from 100pf the problem was that the debian 3 1 image does not recognize mass storage drive other usb devices can be recognized the capacitor value is critical because if 100pf is placed the board starts better on battery but does not recognize any mass storage drive if 10pf is placed the mass storage drive is recognized but the board starts more difficult only with battery supply so the compromise is 20 pf 57
- Board revision 57
- C1 c23 and c24 changed from 33pf to 15pf 57
- Replaced the package of the microsd card with an easier to place one 2 fixed the accidentally mirrored lipo print at the bottom 3 changed c23 c24 to 10pf from 4 pf the 4 pf capacitors allow better start of the board but affect the video output quality since the frequency gets disturbed 10pf is a good compromise 57
- Useful web links and purchase codes 58
- 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 59
- Olimex 2015 imx233 olinuxino maxi user s manual 59
- Page 59 of 59 59
- Please consider reading the paragraph below about the warranty of olimex products 59
- Product support 59
- The full text might be found at https www olimex com wiki gtc warranty for fut 59
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