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A20-OLX-LIME
Инструкция по эксплуатации Страница: 1

OLIMEX A20-OLX-LIME Инструкция по эксплуатации онлайн

A20-OLINUXINO-LIME

and

A20-OLINUXINO-LIME-4GB

Open-source single-board Android/Linux mini-computer

USER’S MANUAL

Revision H, March 2015

All boards produced by Olimex LTD are ROHS compliant

Содержание

Disclaimer 2
There is no warranty for the design materials and the components used to create a20 olinuxino lime and a20 olinuxino lime 4gb they are considered suitable only for respectively a20 olinuxino lime or a20 olinuxino lime 4gb 2
Chapter 1 overview 5 3
Chapter 2 setting up the olinuxino board 8 3
Chapter 3 a20 olinuxino lime board description 20 3
Chapter 4 the allwinner a20 microcontroller 22 3
Chapter 5 control circuity 24 3
Disclaimer 2 3
Table of contents 3
Chapter 6 connectors and pinout 25 4
Chapter 7 schematics 42 4
Chapter 8 revision history and support 44 4
Chapter 1 overview 5
Features 5
Introduction to the chapter 5
Board variants 6
Target market and purpose of the board 6
Board version used in the manual 7
Document organization 7
Chapter 2 setting up the olinuxino board 8
Electrostatic and electrical polarity warning 8
Introduction to the chapter 8
Requirements 9
Powering the board 10
Button functions 11
Interacting with the board 11
Hdmi monitor 12
Serial connection at uart0 12
Changing the default image resolution 13
Lcd display 13
Ssh via ethernet connector 13
Ssh via mini usb cable in debian 13
Android calibration 16
Cable 40 40 10cm 10cm long cable suitable for 0 5 step connectors product page 16
Cable idc40 6cm 6cm long cable suitable for 0 step connectors product page 16
Calibrating a display under android is pretty straightforward from the android application 16
Connecting and calibrating a display 16
Debian calibration 16
Important initially the boards are calibrated for a specific display and resolution if you re write the image no matter whether the sd card or the nand memory you might need to use a mouse to calibrate the display initially it might be impossible to calibrate it via touching the display 16
Newer displays made by olimex have both 0 and 0 5 step connectors going for an lcd output you would also need need and a cable to attach the display to the board the cable is sold separately 16
One of the ways to interact with the board is via an external display with or without touchscreen component if you want to use a display for video output from the lime board the best way is to use the lcd_con row of pins the step between the pins of the connector is the smaller one only 0 5 compared to 0 of bigger boards 16
The cable used for connection depends on the specific board you are using and more specifically it depends on the pitch of the lcd connector of the board we have two cables both 40 pins ones but one for the bigger pitch 0 and the other for the smaller one 0 5 each of the displays listed in the table further below has two connectors suitable for both cables 16
The command that allows calibrating in debian linux is 16
The displays recommended for the board at the moment of writing might be found in the following table 16
The displays whose names contain ts include a resistive touch screen component 16
Ts_calibrate 16
Gpio under debian 17
I2c and spi under debian 18
Software support 18
Places to look for more information however we won t install a piece of software for you or write custom program for you we won t provide a specific software solution to a specific software problem 19
Chapter 3 a20 olinuxino lime board description 20
Introduction to the chapter 20
Layout top view 20
At the bottom are located mainly the buttons and microsd card connector 21
Layout bottom view 21
Chapter 4 the allwinner a20 microcontroller 22
Introduction to the chapter 22
The processor 22
Block diagram 23
Chapter 5 control circuity 24
Clocks 24
Introduction to the chapter 24
Power supply circuit 24
Chapter 6 connectors and pinout 25
Introduction to the chapter 25
Microsd card connector 25
Uart0 interface 25
Additionally there are the wp and cp switches that are responsible respectively for sensing whether the card is locked for reading and whether there is a card inserted 26
Sd mmc1 slot 26
Sd mmc1 slot is the microsd card slot located on the top of the board 26
The schematic related to the sd mmc1 microsd connector is shown below 26
This slot is typically used for booting the os due to the larger capacities of the microsd cards compared to sd or mmc cards it is suggested to have an sd card with a proper linux android image especially if you have ordered a version of the board without nand memory it is also recommended to use class 10 10mbyte sec card for faster read write operations lower class cards especially higher capacity ones might slow down the whole system 26
Pwr jack 27
Usb_otg 27
Method of writing the image and confirm your wish to write the image 29
Wait till upgrade succeeds as shown below 29
Ethernet 30
The gnd is common for both levels of the usb_host 30
The lan connectivity is handled by realtek s rtl8201cp some of the features of this 10 100mbit controller are 30
The lime board is equipped with a standard rj45 ethernet connector at the top of the board that allows you to access local network via an ethernet cable 30
The part of the schematic related to the usb_host connectors is listed below 30
The sy6280 responsible for the usb_host1 is enabled by usb0 drv1 processor pin a4 30
The sy6280 responsible for the usb_host2 is enabled by usb0 drv2 processor pin a5 30
There are two usb host connector featured on the board they are called usb_host1 and usb_host2 each of them has own connector both situated near the ethernet connector each of connector has own low loss power distribution switch sy6280 which protects the board in case the devices you have plugged to the board try to draw more current than 523ma combined the maximum current available on each of the usb hosts is exactly 523ma 30
Usb_host connectors 30
The rj45 connector has a small yellow and a small built in leds and they are described below 32
Hdmi connector 33
Note that there are different linux images depending whether the hdmi tv works at 50hz or 60hz refresh rate if you board runs android there is a specific option to set the appropriate hdmi output 33
Pin 14 of the hdmi is not mandatory in hdmi 1 1 c it is reserved pin in hdmi 1 it is optional 33
The part of the schematic that describes the hdmi module is shown below 33
For more information please visit https www olimex com products components cables sata cable set 34
Pay note the two jumpers 5v_e_sata and pc3 pb located at the bottom of the board under the hdmi connector the first one 5v_e_sata is open by default because the board has software control of the powering for the hard disk if you close 5v_e_sata there would always be 5v at the 5v_sata_pwr connector 34
Sata connector and power 34
The part of the schematic describing the sata module is shown below 34
There is a 5v_sata_pwr connector that is suitable for powering 5v hard disks trough the board to keep the low form factor we have placed the small jst connector 34
Which pin does the software control of the sata powering is determined by the position of the pc3 pb8 jumper by default pc3 is used 34
You can make an adapter cable accordingly the other options is to check the sata cable set that we have available 34
Gpio 1 general purpose input output 40pin connector 35
Gpio connectors 35
A general advice for easier use of the microphone headphone and vga interfaces of a20 olinuxino lime is to take a look at the schematics of another board with those interfaces already installed for example those are present in a20 olinuxino micro inspect the schematic carefully 36
Header like the one on the a20 board you might use the cable for the a20 olinuxino micro called a20 vga cable the 6 signals needed are the 5 signals mentioned about plus gnd 36
The signal layout is described below 36
Gpio 2 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 2 connector numbers are printed at the bottom of the board for your convenience 37
Gpio 3 general purpose input output 40pin connector 38
Gpio 4 connector features the rest of the signals available and few additional signals that might need testing 38
Gpio 4 general purpose input output 20pin connector 38
Important to use android with display or resolution different than hdmi and 1024 600 default settings you need to upload new android image to the board these images are available here https www olimex com wiki a20 olinuxino lime using an operating system nand flash 39
Important you need additional 40pin ribbon cable to connect an olimex display and the lcd_con 39
In debian linux you would need to start a start a shell script to change the built in the image resolution settings start it with change_display_a20_lime sh and follow the instructions please refer to chapter 2 changing the default image resolution for more information 39
Lcd_con 40pin connector 39
The lcd connector is suitable for a number of olimex displays and touchscreen panels with different native resolution the smallest available is the 4 one called lcd olinuxino 4 ts with native screen resolution of 480 272 through the 7 one named lcd olinuxino 7ts with 800 480 to the 1024 600 10 lcd olinuxino 10ts 39
The lcd_con pins are led out on a separate 40pin connecter for the ease of connecting an lcd we have tested the ability of the board to interact with such a display they allow the user to attach additional hardware check readings or perform hardware debug 39
Jumper description 40
Please note that most the jumpers on the board are smt type if you feel insecure of your soldering cutting technique it is better not to try to adjust the jumpers since it is possible to damage the board 40
Additional hardware components 41
Chapter 7 schematics 42
Eagle schematic 42
Introduction to the chapter 42
Note that all dimensions are in mils 43
Physical dimensions 43
Board revision 44
Chapter 8 revision history and support 44
Document revision 44
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 44
Introduction to the chapter 44
Remember to check the schematics and the board design files to compare the differences 44
Useful web links and purchase codes 45
Frequently asked questions 46
For product support hardware information and error reports mail to support olimex com all document or hardware feedback is welcome 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 49
Olimex 2015 a20 olinuxino lime user s manual 49
Page 49 of 49 49
Product support 49
The full text might be found at https www olimex com wiki gtc warranty for future reference 49

OLIMEX A20-OLX-LIME Инструкция по эксплуатации онлайн

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