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OLIMEX A13-SOM-512 [4/36] Chapter 7 schematics 30
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OLIMEX© 2015 A13-SOM user's manual
6.1.1 UART1 interface ........................................................................................................................................... 24
6.2 MicroSD card connector ....................................................................................................... 24
6.2.1 SD/MMC slot ................................................................................................................................................ 25
6.3 Power pins for external power supply .................................................................................. 25
6.4 GPIO connectors .................................................................................................................... 26
6.4.1 GPIO-1 (General Purpose Input/Output) 40pin connector ..................................................................... 27
6.4.2 GPIO-2 (General Purpose Input/Output) 10pin connector ..................................................................... 27
6.4.3 GPIO-3 (General Purpose Input/Output) 10pin connector ..................................................................... 28
6.5 LCD_TR 40pin connector ..................................................................................................... 28
6.6 Jumper description ................................................................................................................ 29
6.7 Additional hardware components ........................................................................................ 29
CHAPTER 7: SCHEMATICS .................................................................................. 30
7. Introduction to the chapter ..................................................................................................... 30
7.1 Eagle schematic ...................................................................................................................... 30
7.2 Physical dimensions ............................................................................................................... 31
CHAPTER 8: REVISION HISTORY AND SUPPORT ........................................ 32
8. Introduction to the chapter ..................................................................................................... 32
8.1 Document revision ................................................................................................................. 32
8.2 Board revision ........................................................................................................................ 32
8.3 Useful web links and purchase codes ................................................................................... 33
8.4 Frequently asked questions ................................................................................................... 34
8.5 Product support ..................................................................................................................... 36
Page 4 of 36
Содержание
- A13 som 256 and a13 som 512 1
- System on module boards capable of linux boot 1
- User s manual 1
- Disclaimer 2
- There is no warranty for the design materials and the components used to create a13 som 256 and a13 som 512 they are considered suitable only for a13 som 256 and a13 som 512 respectively 2
- Chapter 1 overview 5 3
- Chapter 2 setting up the a13 som board 9 3
- Chapter 3 board description 18 3
- Chapter 4 the allwinner a13 microcontroller 20 3
- Chapter 5 control circuity 22 3
- Chapter 6 connectors and pinout 23 3
- Disclaimer 2 3
- Table of contents 3
- Chapter 7 schematics 30 4
- Chapter 8 revision history and support 32 4
- Chapter 1 overview 5
- Introduction to som system on a module 5
- Introduction to the chapter 5
- Target market of the board 6
- Board variants 7
- Board version used in the manual 7
- Features of a13 som boards 7
- Document organization 8
- Chapter 2 setting up the a13 som board 9
- Electrostatic and electrical polarity warning 9
- Introduction to the chapter 9
- Requirements 9
- Powering the board 10
- Stand alone powering 10
- Button functions 11
- Mounted powering 11
- Changing the default image resolution 12
- Interacting with the board 12
- A13 som itself has no direct way of connecting an olimex display with or without touchscreen component using a display without a13 som wifi is possible via cables but hard to accomplish and impractical it is recommended to try to use a display only if you also have a13 som wifi at your disposal 15
- Cable 40 40 10cm 10cm long cable suitable for 0 5 step connectors product page 15
- Cable idc40 6cm 6cm long cable suitable for 0 step connectors product page 15
- Connecting and calibrating a display 15
- Following web page for more information http linux sunxi org fex_guide more information on script editing might be found in the following wiki artice fex edit 15
- Newer displays made by olimex have both 0 and 0 5 step connectors so if you are going to need only the display and a cable sold separately 15
- 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 above has two connectors suitable for both cables 15
- The displays recommended for the board at the moment of writing might be found in the table below 15
- The displays whose names contain ts include a resistive touch screen component 15
- The typical a13 som user would not need to edit the files however 15
- Unlike other olimex allwinner boards the a13 som lacks a row of pins that allows the user to connect a display out of the box the board s lcd_tr connector is female and has a smaller 0 5 step this means that if you use a display made by olimex you would need additional 2 20 male male 0 5 header to convert the female connector to male the 0 5 headers are somehow hard to find so we sell them here 0 5 step connectors there is also something very important to notice since a stand alone a13 som gets powered by 3 v this means that you will not be able to power the display via the board the olimex made displays require 5v of voltage you would need to power the display externally 15
- Android calibration 16
- Debian calibration 16
- Software support 16
- Chapter 3 board description 18
- Introduction to the chapter 18
- Layout top view 18
- Layout bottom view 19
- Chapter 4 the allwinner a13 microcontroller 20
- Introduction to the chapter 20
- The processor 20
- Block diagram 21
- Chapter 5 control circuity 22
- Clocks 22
- Introduction to the chapter 22
- Power supply circuit 22
- Chapter 6 connectors and pinout 23
- Communication with a13 som 23
- Introduction to the chapter 23
- Microsd card connector 24
- Uart1 interface 24
- Power pins for external power supply 25
- Sd mmc slot 25
- Sd mmc slot is a microsd card slot connector located on the top of the board 25
- The required current may vary depending on the peripherals connected to the board the power supply should be capable of providing at least 0 a of current 25
- The schematic related to the sd mmc microsd connector is shown below 25
- The table with the microsd card signals might be found below 25
- There are two power pins suitable for powering the board these are located on different places of a13 som one at the uart1 connector the other on gpio1 connector to power the board you need to provide 3 v to one of them you can use any of the pins or the pinholes named gnd 25
- 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 25
- Gpio connectors 26
- Gpio 1 general purpose input output 40pin connector 27
- Gpio 2 connector 27
- Gpio 2 general purpose input output 10pin connector 27
- Gpio pin signal name processor pin gpio pin signal name processor pin 27
- Lradc lradc 86 10 hpoutr hpoutr 78 27
- Note that signals pin6 pwm0 pin7 pin8 pin9 respectively pins 9 11 13 15 are also available at the lcd_tr connector avoid multiplexing 27
- Olimex 2015 a13 som user s manual 27
- Olimex sells additional and replacement male and female 0 5 50 mil step connectors we also have a female female cable named cable 40 40 10cm suitable for the 40 pin connectors 27
- Page 27 of 36 27
- The only power line at the gpio connectors that might be used as input is the 3 v one at gpio1 27
- The rest of the power signals are outputs and it would be incorrect to try to power the board from there 27
- Udm0 udm0 93 4 micin1 micin1 84 27
- Udm1 udm1 95 8 hpcom hpcom 77 27
- Udp0 udp0 94 2 vmic vmic 85 27
- Udp1 udp1 96 6 hpout2 hpoutl 74 27
- Gpio 3 general purpose input output 10pin connector 28
- Important it is a good idea to use a13 som wifi that provides a 0 step connector alternatively the connector can be used standalone but you would need to either use wires or male male connector and two different 40pin ribbon cables to connect an olimex display and the lcd_con 28
- Lcd_tr 40pin connector 28
- Olimex 2015 a13 som user s manual 28
- Page 28 of 36 28
- Please note that the smallest display 4 480 272 is not suitable for the official android images we provide however it can be used with debian linux 28
- The biggest display 15 1366 768 or 1920 1080 is not supported by the a13 som design the core processor lacks the required computing power for a smooth operation 28
- The pins used for lcd display connection are led out to a separate 40pin connecter for ease we have tested the ability of the board to interact with such a display these pins also allow the user to attach additional hardware check readings or perform hardware debug 28
- Additional hardware components 29
- Jumper description 29
- Chapter 7 schematics 30
- Eagle schematic 30
- Introduction to the chapter 30
- Note that all dimensions are in mils 31
- Physical dimensions 31
- Board revision 32
- Chapter 8 revision history and support 32
- Document revision 32
- 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 32
- Introduction to the chapter 32
- Remember to check the schematics and the board design files to compare the differences 32
- Useful web links and purchase codes 33
- Frequently asked questions 34
- 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 36
- Olimex 2015 a13 som user s manual 36
- Page 36 of 36 36
- Product support 36
- The full text might be found at https www olimex com wiki gtc warranty for future reference 36
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