sbc_allwinner_a13

Allwinner A13 Board

Description

Board overview (draft): [TBD]

Features

Characteristic	Description
Dimensions	80mm x 40mm
Processor	Allwinner A13 (ARM Cortex-A8 @ 1Ghz)
Oscillators	24MHz main clock
RAM	DDR3 512MB max (8Gbit module)
Storage	microSD
USB	1 microUSB OTG
Ethernet	N/A
WiFi/BT	RTL8188CUS module
LCD	Parallel interface 18bit
Expansions	1xUART, 1xI2C, 1xSPI, 4xGPIO, Microphone, EarphoneOut
Supply	Power path between USB/ACIN/Battery, 5V max

Expansions

The board can be combined with several predefined capes that add functionality.

• LCD cape can be used to add a 3inch LCD/Touch with 800x480px resolution.
• GPS cape adds GPS/GNSS/GLONAS capabilities
• GSM cape adds GPRS connectivity.

Power considerations

A13 features a few power rails:

• VDD-CPU - TBD - from AXP209
• VDD-INT - 1.2V - from DCDC
• VDD-GPIO - 3V3 - from AXP209
• VDD-DRAM - 1V5 - from DCDC
• AVCC - 3V - from AXP209

The datasheet states that AVCC and VDD-DRAM must be present at all times (even standby). VDD-INT and VDD-CPU can’t be tied together because VDD-CPU is DVS enabled.

Memory considerations

A13 DRAM controller doesn’t provide DDR-CS. On the memory side the pin is tied to GND. Memory tuning should be performed as described here

Building and flashing

Build U-Boot and Linux kernel + rootFS - TBD

Flash to SDCard - TBD

Resources

You can find all necesary information to build or evaluate the module here:

• Fabrication files

Inspiration for this has been drawn from:

• Olimex boards
• Sunxi community