OLIMEX A10-LIME-N8GB — руководство пользователя по интерфейсам A10-OLinuXino-LIME [32/46]

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• There is no warranty for the design materials and the components used to create a10 olinuxino lime and a10 olinuxino lime 4gb they are considered suitable only for respectively a10 olinuxino lime or a10 olinuxino lime 4gb p.2
• Disclaimer p.2
• Chapter 1 overview 5 p.3
• Chapter 2 setting up the olinuxino board 8 p.3
• Table of contents p.3
• Disclaimer 2 p.3
• Chapter 6 connectors and pinout 21 p.3
• Chapter 5 control circuity 20 p.3
• Chapter 4 the allwinner a10 microcontroller 18 p.3
• Chapter 3 a10 olinuxino lime board description 16 p.3
• Chapter 8 revision history and support 40 p.4
• Chapter 7 schematics 38 p.4
• Introduction to the chapter p.5
• Features p.5
• Chapter 1 overview p.5
• Target market and purpose of the board p.6
• Board version used in the manual p.6
• Board variants p.6
• Document organization p.7
• Chapter 2 setting up the olinuxino board p.8
• Requirements p.8
• Introduction to the chapter p.8
• Electrostatic and electrical polarity warning p.8
• Powering the board p.10
• Changing the default image resolution p.11
• Button functions p.11
• Connecting and calibrating a display p.12
• Gpio under debian p.13
• Debian calibration p.13
• Android calibration p.13
• I2c and spi under debian p.14
• Software support p.15
• Layout top view p.16
• Introduction to the chapter p.16
• Chapter 3 a10 olinuxino lime board description p.16
• At the bottom are located mainly the buttons and microsd card connector p.17
• You should be careful of the surface that you use to place the board p.17
• Layout bottom view p.17
• The processor p.18
• Introduction to the chapter p.18
• Chapter 4 the allwinner a10 microcontroller p.18
• Power supply circuit p.20
• Introduction to the chapter p.20
• Clocks p.20
• Chapter 5 control circuity p.20
• Uart0 interface p.21
• Introduction to the chapter p.21
• Communication with lime p.21
• Chapter 6 connectors and pinout p.21
• Sd mmc1 slot p.22
• Microsd card connector p.22
• 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 p.23
• You should provide 5 volts direct current and the required current may vary depending on the peripherals connected to the board the power supply you use should be capable of providing at least 1a of current p.23
• The power jack used is the typical one used by olimex in most of our products the dc barrel jack has 2 mm inner pin and 6 mm hole more information about the exact component might be found here https www olimex com wiki pwrjack p.23
• Pwr jack p.23
• More info about the power supply can be found in chapter 5 of this manual p.23
• Usb_otg connector p.24
• The usb_otg features low loss power distribution switch sy6280 which protects the board in case the devices you have plugged to the usb_otg attempt to draw more current than 523ma combined the maximum current available on the 5v usb_otg is exactly 523ma p.24
• The sy6280 responsible for the usb_otg is enabled by usb0 drv processor pin c12 port b9 thus the usb_otg is also controlled by the same signal p.24
• The main way of changing the firmware image located on the nand of a10 olinuxino lime 4gb is via the usb otg connector how to change the firmware is explained after the hardware details the part of the schematic related to the usb_otg is shown below p.24
• Please note that the usb0 drv pin c12 port b9 is multiplexed with the i2s_do1 signal if you are going to use the i2s audio interface then you would probably need to change the position of the smt jumper pb9 ph7_usb which by default connects usb_otg to the pb9 this operation would require cutting between the pads of the default position with a very sharp object and then soldering the pads of the other position together doing so you would be able to use both the usb_otg via port ph7 this time and the i2s interface p.24
• Additionally pb9 ph7_gpio jumper controls which of the two ports pb9 or ph7 should be lead out to pin 9 of gpio3 connector for easier access by default this jumper is in ph7_gpio position and ph7 is lead to pin 9 of gpio3 p.24
• The sy6280 responsible for the usb_host1 is enabled by usb0 drv1 processor pin a4 p.26
• The part of the schematic related to the usb_host connectors is listed below p.26
• 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 p.26
• The lan connectivity is handled by realtek s rtl8201cp some of the features of this 10 100mbit controller are p.26
• The gnd is common for both levels of the usb_host p.26
• Ethernet p.26
• Usb_host connectors p.26
• 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 p.26
• The sy6280 responsible for the usb_host2 is enabled by usb0 drv2 processor pin a5 p.26
• The rj45 connector has a small yellow and a small built in leds and they are described below p.28
• The part of the schematic that describes the hdmi module is shown below p.29
• Pin 14 of the hdmi is not mandatory in hdmi 1 1 c it is reserved pin in hdmi 1 it is optional p.29
• 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 p.29
• Hdmi connector p.29
• You can make an adapter cable accordingly the other options is to check the sata cable set that we have available p.30
• 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 p.30
• 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 p.30
• The part of the schematic describing the sata module is shown below p.30
• Sata connector and power p.30
• 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 p.30
• For more information please visit https www olimex com products components cables sata cable set p.30
• Gpio 1 general purpose input output 40pin connector p.31
• Gpio ports p.31
• The signal layout is described below p.32
• The light blue boxes represent the pins related to microphone input the yellow boxes represent pins related to the headphone output the pale green boxes represent the pins related to alternative video output there are more located on the lcd connector p.32
• Lcd_vsync ac9 and lcd_hsync ab9 p.32
• If you inspect the schematics of a board with vga connector like a20 olinuxino micro carefully you would notice that there are two extra transistors on the synchronization lines those are transistors meant to shift the levels to 5v the 3 v levels from the processor might work but the standard requires 5v levels of vsync and hsync however if you lead the signals to a 6 pin 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 p.32
• A general advice for easier use of the microphone headphone and vga interfaces of a10 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 p.32
• 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 p.33
• Gpio 2 general purpose input output 40pin connector p.33
• Gpio 4 general purpose input output 20pin connector p.34
• Gpio 4 connector features the rest of the signals available and few additional signals that might need testing p.34
• Gpio 3 general purpose input output 40pin connector p.34
• 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 p.35
• Lcd_con 40pin connector p.35
• 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_a10_lime sh and follow the instructions please refer to chapter 2 changing the default image resolution for more information p.35
• Important you need additional 40pin ribbon cable to connect an olimex display and the lcd_con p.35
• 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 a10 olinuxino lime using an operating system nand flash p.35
• 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 p.35
• 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 p.36
• Jumper description p.36
• Additional hardware components p.37
• Introduction to the chapter p.38
• Eagle schematic p.38
• Chapter 7 schematics p.38
• Physical dimensions p.39
• Note that all dimensions are in mils p.39
• Introduction to the chapter p.40
• 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 p.40
• Document revision p.40
• Chapter 8 revision history and support p.40
• Remember to check the schematics and the board design files to compare the differences p.41
• Board revision p.41
• Useful web links and purchase codes p.42
• Frequently asked questions p.43
• Q i have a 4gb version of the board the board doesn t seem to have android loaded a we no longer load android on the nand memory of the boards you can upload android following the advice above in this document p.45
• The full text might be found at https www olimex com wiki gtc warranty for future reference p.46
• Product support p.46
• Page 46 of 46 p.46
• Olimex 2015 a10 olinuxino lime user s manual p.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 p.46