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Comparative Analysis of Amlogic A311D and A311D2


Amlogic A311D2 is an upgraded version of A311D, which has improved performance and supports richer video input and output interfaces, NPU becomes an option. Compared with the A311D, the new version of the A311D2 is more suitable for commercial display or smart large screen product applications.

A311D2 has 4x Cortex A73 at 2.2Ghz, 4x Cortex-A53 at 2.0GHz, four Cortex-A53 cores, and a more powerful Mali-G52 MP8 (8EE) GPU, which supports up to 16GB LPDDR4/X memory, providing performance guarantee for product applications. A311D2 supports eDP and LVDS video interfaces, supports 2x V-by-One outputs, and 3x HDMI 2.1 up to 4Kp60. A311D2 supports 8K@24fps AV1 video decoding, integrates a 16MP ISP, and supports 4K video encoding. A311D2 can support 4K UI rendering, which is currently only available for flagship products, and can provide better visual effects for high-resolution apps.

Amlogic A311D2 SoCAmlogic A311D SoC

Comparison of Amlogic A311D2 and A311D specifications:

ModelAmlogic A311DAmlogic A311D2
CPU4x 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)
RAMUp to 4GB 32-bit LPDDR4/X @ 1608MHzUp to 16GB 64-bit LPDDR4/X @ 2133 MHz
Display I/F1x HDMI 2.0 up to 4Kp601x MIPI DSI
Camera I/F 1x 4-lane MIPI-CSI with 8MP ISP2x 4-lane MIPI-CSI with 16MP ISP
HDMI Input No3x HDMI 2.1 up to 4Kp60
4K UINoYes
Video Decoding4Kx2Kp60 + 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
USB1x USB 3.0 multiplexed with PCIe
1x USB 2.0 with OTG support
1x USB 3.0
1x USB 2.0 with OTG support
PCIe1-lane PCIe multiplexed with USB 3.01-lane PCIe
Process12 nm

Amlogic A311D has multiplexed PCIe and USB 3.0 interfaces, which can realize the following two configurations: 1x USB 2.0 Host + 1 PCIe or 1x USB3.0 (no PCIe). But the PCIe and USB 3.0 interfaces in Amlogic A311D2 are independent, so we can also use USB 3.0 while using PCIe (5 Gbps). Other than the optional dual HiFi 5 audio DSP and neural network extended audio/voice processing, the specific information of AI processor has not yet been clarified.

Generally speaking, the usage scenario of A311D2 is still positioned at the 4K level, and 8K is only a bright spots, which cannot really meet the functional requirements of the 8K scenario. A311D2 improves upon GPU, 4K video encoding, HDMI 2.1 feature support, separate USB 3.0 and PCIe ports, HDMI input, and RAM. These improvements are mainly aimed at the expansion of application scenarios, but the performance of the chip itself is not greatly improved. However, it is very necessary for industry to upgrade these functions, especially for commercial display and smart large screen applications.

Keyword: A311D A311D2

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