Amlogic A311D2 octa-core Arm processor supports up to 16GB RAM

Amlogic A311D2 octa-core processor is the successor to Amlogic A311D hexa-core SoC with four Cortex-A73 cores, four Cortex-A53 cores, a more powerful Mali-G52 MP8 (8EE) GPU, support for eDP and LVDS video interface, 8Kp24 AV1 video decoding, and support for a whopping 16GB LPDDR4/X memory.

But it’s not all! The chip also includes supports for three HDMI 2.1 inputs up to 4Kp60, a 16MP ISP, 4K video encoding, and the more powerful GPU and higher memory bandwidth enable 4K user interfaces which were not feasible on most other Arm hardware barring the NVIDIA Shield.

Amlogic A311D2 Block DiagramComparison of Amlogic A311D2 and A311D specifications.

Amlogic A311D
Amlogic A311D2
4x Cortex-A73 at 2.2GHz, 2x Cortex-A53 at 1.8GHz4x Cortex-A73 at 2.2GHz, 4x Cortex-A53 at 2.0GHz
GPUArm Mali G52 MP4 (6EE) at 800MHzArm Mali-G52 MP8 (8EE)  
NPU5 TOPSTBC, extra license required
RAM Up to 4GB 32-bit LPDDR4/X @ 1608MHzUp to 16GB 64-bit LPDDR4/X @ 2133 MHz
Display I/F1x HDMI 2.0 up to 4Kp60
1x HDMI 2.1 port up to 4Kp60
with EMP, ALLM, VRR, QMS, eARC, etc...
2x MIPI DSI up to 1920x1080
2x 8-lane V-by-One up to 4Kp60
2x 4-lane eDP up to 2560x1600
Camera I/F1x 4-lane MIPI-CSI with 8MP ISP2x 4-lane MIPI-CSI with 16MP ISP
HDMI InputNo3x HDMI 2.1 up to 4Kp60  
4K UINoYes
Video Decoding
4Kx2Kp60 + 1x1080p60
Main Video Codecs4K H.265, VP9, and AVS28Kp24/4Kp60 AV1, H.265, VP9, 4Kp60 AVS2
Video EncodingH.265 & H.264 at 1080p60H.265 & H.264 at 4Kp50
EthernetGigabit Ethernet MAC
Fast Ethernet PHY
Gigabit Ethernet MAC
Fast Ethernet PHY
USB*1x USB 3.0 multiplexed with PCIe
1x USB 2.0 with OTG support
1x USB 3.0
1x USB 2.0 with OTG support
PCIe*1-lane PCIe multiplexed with USB 3.01-lane PCIe
12 nm

* Amlogic A311D multiplexed PCIe and USB 3.0  interfaces means two configurations are possible: 1x USB 2.0 Host + 1 PCIe, OR 1x USB3.0 (No PCIe), but Amlogic A311D2 PCIe and USB 3.0 interfaces are independent, so we are not losing USB 3.0 when using PCIe (5 Gbps).

The quick reference manual does not include any specific information about an AI accelerator, except for an optional dual HiFi 5 audio DSP with Neural Network Extension for audio/voice processing, so there’s no indication about an NPU for computer vision application, but we’ll have to see. At first, I thought Amlogic A311D2 may be a variant of the long-expected Amlogic S908X, just like A311D and S922X-B are practically the same processor, but while 8K video decoding is supported, 8Kp60 video output is not.

I would only expect Amlogic A311D2 to outperform A331D in terms of CPU power in highly parallel tasks, but the real improvements are with the GPU, 4K video encoding, HDMI 2.1 features support, separate USB 3.0 and PCIe interfaces, HDMI inputs, and obviously the extra RAM, which would allow new applications such as multiple camera NVR’s, more powerful and versatile Arm Linux mini PC’s, SBC’s with additional high-speed interfaces, etc…

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