OLIMEX A10-OLX-LIME [4/45] Chapter 7 schematics 38

Disclaimer 2

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 2

Chapter 1 overview 5 3

Chapter 2 setting up the olinuxino board 8 3

Chapter 3 a10 olinuxino lime board description 16 3

Chapter 4 the allwinner a10 microcontroller 18 3

Chapter 5 control circuity 20 3

Chapter 6 connectors and pinout 21 3

Disclaimer 2 3

Table of contents 3

Chapter 7 schematics 38 4

Chapter 8 revision history and support 40 4

Chapter 1 overview 5

Features 5

Introduction to the chapter 5

Board variants 6

Board version used in the manual 6

Target market and purpose of the board 6

Document organization 7

Chapter 2 setting up the olinuxino board 8

Electrostatic and electrical polarity warning 8

Introduction to the chapter 8

Requirements 8

Powering the board 10

Button functions 11

Changing the default image resolution 11

Connecting and calibrating a display 12

Android calibration 13

Debian calibration 13

Gpio under debian 13

I2c and spi under debian 14

Software support 15

Chapter 3 a10 olinuxino lime board description 16

Introduction to the chapter 16

Layout top view 16

At the bottom are located mainly the buttons and microsd card connector 17

Layout bottom view 17

You should be careful of the surface that you use to place the board 17

Chapter 4 the allwinner a10 microcontroller 18

Introduction to the chapter 18

The processor 18

Chapter 5 control circuity 20

Clocks 20

Introduction to the chapter 20

Power supply circuit 20

Chapter 6 connectors and pinout 21

Communication with lime 21

Introduction to the chapter 21

Uart0 interface 21

Microsd card connector 22

Sd mmc1 slot 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 23

More info about the power supply can be found in chapter 5 of this manual 23

Pwr jack 23

The power jack used is the typical dc barrel jack one used by olimex 2 6 9 mm in most of our products more information about the exact component might be found here https www olimex com wiki pwrjack 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 23

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 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 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 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 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 24

Usb_otg connector 24

Ethernet 26

The gnd is common for both levels of the usb_host 26

The lan connectivity is handled by realtek s rtl8201cp some of the features of this 10 100mbit controller are 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 26

The part of the schematic related to the usb_host connectors is listed below 26

The sy6280 responsible for the usb_host1 is enabled by usb0 drv1 processor pin a4 26

The sy6280 responsible for the usb_host2 is enabled by usb0 drv2 processor pin a5 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 26

Usb_host connectors 26

The rj45 connector has a small yellow and a small built in leds and they are described below 28

Hdmi connector 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 29

Pin 14 of the hdmi is not mandatory in hdmi 1 1 c it is reserved pin in hdmi 1 it is optional 29

The part of the schematic that describes the hdmi module is shown below 29

For more information please visit https www olimex com products components cables sata cable set 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 30

Sata connector and power 30

The part of the schematic describing the sata module is shown below 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 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 30

You can make an adapter cable accordingly the other options is to check the sata cable set that we have available 30

Gpio 1 general purpose input output 40pin connector 31

Gpio ports 31

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 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 32

Lcd_vsync ac9 and lcd_hsync ab9 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 32

The signal layout is described below 32

Gpio 2 general purpose input output 40pin connector 33

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 33

Gpio 3 general purpose input output 40pin connector 34

Gpio 4 connector features the rest of the signals available and few additional signals that might need testing 34

Gpio 4 general purpose input output 20pin connector 34

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 35

Important you need additional 40pin ribbon cable to connect an olimex display and the lcd_con 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 35

Lcd_con 40pin connector 35

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 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 35

Jumper description 36

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 36

Additional hardware components 37

Chapter 7 schematics 38

Eagle schematic 38

Introduction to the chapter 38

Note that all dimensions are in mils 39

Physical dimensions 39

Chapter 8 revision history and support 40

Document revision 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 40

Introduction to the chapter 40

Board revision 41

Remember to check the schematics and the board design files to compare the differences 41

Useful web links and purchase codes 42

Frequently asked questions 43

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 45

Olimex 2015 a10 olinuxino lime user s manual 45

Page 45 of 45 45

Product support 45

The full text might be found at https www olimex com wiki gtc warranty for future reference 45

OLIMEX A10-OLX-LIME [4/45] Chapter 7 schematics 38

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