A31s
Datasheet
Revision 1.4
Feb 14, 2014
Copyright © 2014 Allwinner Technology. All Rights Reserved.
Declaration
THIS A31s DATASHEET IS THE ORIGINAL WORK AND COPYRIGHTED PROPERTY OF ALLWINNER
TECHNOLOGY (“ALLWINNER”). REPRODUCTION IN WHOLE OR IN PART MUST OBTAIN THE
WRITTEN APPROVAL OF ALLWINNER AND GIVE CLEAR ACKNOWLEDGEMENT TO THE COPYRIGHT
OWNER.
THE INFORMATION FURNISHED BY ALLWINNER IS BELIEVED TO BE ACCURATE AND RELIABLE.
ALLWINNER RESERVES THE RIGHT TO MAKE CHANGES IN CIRCUIT DESIGN AND/OR
SPECIFICATIONS AT ANY TIME WITHOUT NOTICE. ALLWINNER DOES NOT ASSUME ANY
RESPONSIBILITY AND LIABILITY FOR ITS USE. NOR FOR ANY INFRINGEMENTS OF PATENTS OR
OTHER RIGHTS OF THE THIRD PARTIES WHICH MAY RESULT FROM ITS USE. NO LICENSE IS
GRANTED BY IMPLICATION OR OTHERWISE UNDER ANY PATENT OR PATENT RIGHTS OF
ALLWINNER. THIS DATASHEET NEITHER STATES NOR IMPLIES WARRANTY OF ANY KIND,
INCLUDING FITNESS FOR ANY PARTICULAR APPLICATION.
THIRD PARTY LICENCES MAY BE REQUIRED TO IMPLEMENT THE SOLUTION/PRODUCT.
CUSTOMERS SHALL BE SOLELY RESPONSIBLE TO OBTAIN ALL APPROPRIATELY REQUIRED THIRD
PARTY LICENCES. ALLWINNER SHALL NOT BE LIABLE FOR ANY LICENCE FEE OR ROYALTY DUE IN
RESPECT OF ANY REQUIRED THIRD PARTY LICENCE. ALLWINNER SHALL HAVE NO WARRANTY,
INDEMNITY OR OTHER OBLIGATIONS WITH RESPECT TO MATTERS COVERED UNDER ANY
REQUIRED THIRD PARTY LICENCE.
A31s Datasheet
(Revision1.4)
Copyright © 2014 Allwinner Technology. All Rights Reserved.
Page 2
Revision History
Version
1.0
1.1
1.2
1.3
1.4
Date
Jan 30, 2013
Mar 21, 2013
Oct 16, 2013
Oct 20, 2013
Feb 14, 2014
Author
Description
Initial Version
Revise the company logo
Add the VCC_HDMI max value
Modify the electrical characteristic
section
Add EMAC function description
A31s Datasheet
(Revision 1.4)
Copyright © 2014 Allwinner Technology. All Rights Reserved.
Page 3
Table of Contents
Declaration ............................................................................................................................. 2
Revision History .................................................................................................................... 3
Table of Contents .................................................................................................................. 4
1 OVERVIEW ...................................................................................................................... 5
2 FEATURES ...................................................................................................................... 6
3 BLOCK DIAGRAM ........................................................................................................ 10
4 PIN DESCRIPTION........................................................................................................ 11
4.1. Pin Characteristics .................................................................................................. 11
4.2. GPIO Multiplexing Functions .................................................................................. 18
4.3. Detailed Pin/Signal Description .............................................................................. 22
4.4. Power/GND Signal Description .............................................................................. 27
5 ELECTRICAL CHARACTERISTICS ............................................................................. 29
5.1. Absolute Maximum Ratings .................................................................................... 29
5.2. Recommended Operating Conditions .................................................................... 29
5.3. DC Electrical Characteristics .................................................................................. 30
5.4. Oscillator Electrical Characteristics ........................................................................ 30
5.5. Power up AND Power Down Sequence ................................................................. 32
6 PIN ASSIGNMENT ........................................................................................................ 33
6.1. Ball map .................................................................................................................. 33
6.2. Pin Dimension ......................................................................................................... 34
A31s Datasheet
(Revision1.4)
Copyright © 2014 Allwinner Technology. All Rights Reserved.
Page 4
1
OVERVIEW
The Allwinner A31s processor is a quad-core phablet processor designed for the phablet market. The phablet
is a product category that combines the functionalities of a smartphone with that of a tablet, and its size
usually falls somewhere in between a smartphone and a tablet.
The A31s processor is based on quad-core Cortex-A7 CPU, which is the most power efficient processor
developed by ARM. It also comes with SGX544MP2 GPU with eight logic core to enable powerful 3D
computing capability as well as excellent UI experience, especially when it comes to the smoothness of
screens with large size.
More importantly, A31s processor integrates a robust Audio Codec that includes two sets of I2S/PCM
interface for Baseband and Bluetooth, two integrated differential analog MIC for headset and phone, as well
as a digital MIC. It is capable of 3G, 2G, LTE, WiFi, Bluetooth, FM, GPS, AGPS, NFC and other voice and
data wireless transmission technology with a minimum of external components.
Additionally, A31s processor provides a wide range of peripheral interfaces. For example, it integrates display
interfaces such as HDMI, RGB LCD and LVDS, image input interfaces such as CSI, and data interfaces such
as USB DRD, USB EHCI/OHCI, SDC, SPI, UART, etc.
When it comes to power efficiency, AXP221s is specially designed for the power optimization of A31s. A31s
processor also supports a smart Power Consumption Management System to dynamically adjust CPU
frequency and voltage, supports DRAM Dynamic Frequency Scaling technology to dynamically adjust DRAM
frequency based on bandwidth requirements, and also supports Super Standby Mode to lower the system
power consumption during system standby.
A31s Datasheet
(Revision 1.4)
Copyright © 2014 Allwinner Technology. All Rights Reserved.
Page 5
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