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Amlogic A111, A112 & A113 Processors are Designed for Audio Applications, Smart Speakers

September 9th, 2017 Leave a comment Go to comments

Amlogic processors are mostly found in TVs and TV boxes, but the company is now apparently entering a new market with A111, A112, and A113 audio processors. I was first made aware of those new processors through Buildroot OpenLinux Release Notes V20170831.pdf document posted on their Open Linux website, where two boards with Amlogic A113D and A113X are shown.

S400 Version 03 Board

First, S400 board with the following key features/specifications:

  • SoC – Amlogic A113D CPU
  • System Memory – 1GB DDR3
  • Storage – 512MB SLC NAND flash
  • Display I/F – MIPI interface
  • Connectivity – Gigabit Ethernet SDIO WiFi/BT (AP6356S)
  • Audio
    • SPDIF_IN/SPDIF_OUT
    • LINE_IN/LINE_OUT
    • 2x Audio headers (MIC_Connector & SPK_Connector)
  • USB – 1x USB 2.0 OTG
  • Expansion – 2x PCIe ports
  • Misc – 6x ADC Keys, IR_IN/IR_OUT, UART Interface (RS232)

The second S420 board is based on A113X SoC, and comes with less features (no display, no Ethernet, no PCIe…), less memory:

  • SoC – Amlogic A113X CPU
  • System Memory – 512 MB DDR3
  • Storage – 512MB SLC NAND flash
  • Connectivity – SDIO WiFi/BT (AP6356S)
  • Audio
    • SPDIF_IN
    • LINE_IN/LINE_OUT
    • 2x Audio headers (MIC_Connector & SPK_Connector)
  • USB – 1x USB 2.0 OTG
  • Misc – 6x ADC Keys, IR_IN/IR_OUT, UART Interface (RS232)

The document also explains how to build Linux built with buildroot (you’ll need an Amlogic account), and use audio via applications or frameworks such as aplay, gstreamer, alsaplayer, shairport (Airplay), VLC, DLNA, etc…

Information about Amlogic A113X/A113D processor is lacking on the web, but I eventually found that Amlogic had a YouTube account with now a whopping two subscribers (including yours truly), and one of the two videos was an Alexa voice services demo on Amlogic A113 with what looks like a microphone array inserted on the top of the board.

Further research led me to a page in Chinese discussing Amlogic A111, A112, A113 audio processors, and revealing that Xiaomi AI smart speaker is based on Amlogic A112 quad core Cortex A53 processor, that also shows up in GeekBench running Android 6.0. They also report that A113 features the same four Cortex 53 cores, but has better audio capabilities with 8x PDM interfaces, and 16x I2S interfaces. I also found a page about a microphone array designed for Amlogic S905/S912/A112, and based on Knowles SPH0645LM4H-B miniature microphones .

Finally, I decided to go directly to Amlogic website, and they do have pages for A111 and A112 SoCs, strangely not indexed by search engines so far.

Amlogic A111 key features:

  • CPU – Quad-core ARM Cortex-A5
  • Audio Interface
    • 2-channel I2S input and output
    • TDM/PCM input and output, up to 8 channels
    • S/PDIF output
  • Video Interface – LVDS and MIPI-DSI panel output
  • Security – Supports secure boot and secure OS
  • Ethernet – 10/100/1000M MAC
  • IP License (Optional) – Dolby Digital, Dolby Digital Plus, DTS Digital Surround, DTS HD, DTS Express
  • Process – 28nm HKMG

Amlogic A112 key features:

  • CPU – Quad-core ARM Cortex-A53
  • Audio Interface
    • 8-channel I2S and S/PDIF input and output
    • TDM/PCM input and output, up to 8 channels
    • 2-channel PDM input
  • Video Interface – RGB888 output
  • Security – Supports secure boot and secure OS
  • Ethernet – 10/100M MAC+PHY
  • IP License(Optional) – Dolby Digital, Dolby Digital Plus, DTS Digital Surround, DTS HD, DTS Express
  • Process – 28nm HKMG

If you are interested in evaluating / playing with those processors, and cannot get hold of Amlogic boards (since they only deal with companies), one solution is to get Xiaomi AI smart speaker available for pre-order/arrival notice on sites likes GearBest or GeekBuying, and expected to ship on October 1st.

Thanks to vertycall for the tip.

  1. September 9th, 2017 at 13:57 | #1

    They will receive mainline support too.

  2. September 9th, 2017 at 14:24 | #2

    @Stane1983
    Do you know the source code’s “nicknames” for new family/processors like MesonA or AXXBaby, or something?

  3. Steven
    September 9th, 2017 at 16:06 | #4

    Happy to see chip vendors start to include pcie in their soc. Making high performance storage and network possible on affordable products.

  4. vertycall
    September 11th, 2017 at 17:23 | #5

    @cnxsoft
    Thanks for the detailed review.

    Just curious: what is the benefit of pcie on this device and why do they use it on such “crippled” platform instead of their premium S912 for instance, which would make it a nearly perfect linux box?

  5. September 15th, 2017 at 02:13 | #6

    @vertycall
    There will be… next year. Don’t have any details or specs except that it will have PCIe.

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