OLIMEX A20-OLinuXino-MICRO, Руководство пользователя

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OLIMEX© 2014 A20-OLinuXino-MICRO user's manual
Table of Contents
DISCLAIMER ............................................................................................................. 2
CHAPTER 1: OVERVIEW ........................................................................................ 5
1. Introduction to the chapter ....................................................................................................... 5
1.1 Features ..................................................................................................................................... 5
1.2 Target market and purpose of the board ............................................................................... 6
1.3 Board variants .......................................................................................................................... 6
1.4 Board version used in the manual .......................................................................................... 6
1.5 Organization ............................................................................................................................. 6
CHAPTER 2: SETTING UP THE OLINUXINO BOARD ..................................... 8
2. Introduction to the chapter ....................................................................................................... 8
2.1 Electrostatic and electrical polarity warning ........................................................................ 8
2.2 Requirements ........................................................................................................................... 8
2.3 Powering the board .................................................................................................................. 9
2.4 Prebuilt software .................................................................................................................... 10
2.5 Changing the default image resolution ................................................................................ 10
2.6 Calibrating a display ............................................................................................................. 12
2.6.1 Android calibration ...................................................................................................................................... 12
2.6.2 Debian calibration ........................................................................................................................................ 12
2.7 Software support .................................................................................................................... 12
2.8 Button functions and NAND image restore in Android ..................................................... 12
CHAPTER 3: A20-OLinuXino-MICRO BOARD DESCRIPTION ..................... 14
3. Introduction to the chapter ..................................................................................................... 14
3.1 Layout (top view) ................................................................................................................... 14
3.2 Layout (bottom view) ............................................................................................................. 15
CHAPTER 4: THE ALLWINNER A20 EMBEDDED PROCESSOR ................. 16
4. Introduction to the chapter ..................................................................................................... 16
4.1 The processor ......................................................................................................................... 16
4.2 Block diagram ........................................................................................................................ 17
CHAPTER 5: CONTROL CIRCUITY ................................................................... 18
5. Introduction to the chapter ..................................................................................................... 18
5.1 Reset ........................................................................................................................................ 18
5.2 Clocks ...................................................................................................................................... 18
5.3 Power supply circuit .............................................................................................................. 18
CHAPTER 6: CONNECTORS AND PINOUT ...................................................... 19
6. Introduction to the chapter ..................................................................................................... 19
6.1 Communication with the A20 ............................................................................................... 19
6.1.1 USB-OTG communication (NAND firmware repair/update) .................................................................. 19
6.1.2 UART0, UEXT1, UEXT2 interface ............................................................................................................ 21
6.2 SD card connectors ................................................................................................................ 22
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