MediaTek's MT6855T devices (see Figure 1-1) integrate Bluetooth, FM, WLAN, and GPS modules and are a highly integrated baseband platform that combines modem and application processing subsystems to enable LTE/LTE-A/NR and C2K smartphone applications. The chip integrates two ARM® Cortex-A78 cores running at up to 2.5 GHz, six ARM® Cortex-A55 cores running at up to 2.0 GHz, and a powerful multi-standard video codec. In addition, it includes an extensive set of interfaces and connectivity peripherals for connecting cameras, touchscreen displays, and UFS/eMMC/SD cards.

The application processor is a multi-core ARM® Cortex-A78, ARM® Cortex-A55 with NEON engine, which provides the processing power needed to support the latest OpenOS and its demanding applications such as web browsing, email, GPS navigation, and gaming.

All content can be viewed on a high-resolution touchscreen display, and graphics are enhanced with 2D and 3D graphics acceleration.

Multi-standard video accelerators and advanced audio subsystems are also integrated to deliver advanced multimedia applications and services such as streaming audio and video, multiple decoders and encoders.

The combination of high-performance CPU, DSP, and hardware coprocessors provides a robust modem subsystem capable of supporting NR Sub6, LTE Cat 15, Category 24 HSDPA downlink and Category 7 HSUPA uplink data rates, Category 14 TD-HSDPA downlink and Category 6 TD-HSUPA uplink, as well as Class 12 GPRS, EDGE.

MT6855T also integrates Wireless Communication devices, including WLAN, Bluetooth, and GPS. MT6855T integrates four advanced radio technologies into a single chip to provide the best and most convenient connectivity solution in the industry.

Improves the overall quality of simultaneous transmission of voice, data, and audio/video on mobile phones and media tablets. The small size and low power consumption greatly reduce PCB layout resources.

MT6855T Standout features of integration

• 2 ARM® Cortex-A78 cores running at 2.5 GHz

• 6 ARM® Cortex-A55 cores running at 2.0 GHz

• LPDDR4 and LPDDR5 up to 16 GB (2 lanes, 16-bit data bus width)

• LPDDR4 and LPDDR5 support discrete mode. (LPDDR4x up to 3,200, LPDDR5 up to 4,266)

• Memory clocks up to LPDDR5-5500

• Memory clocks up to LPDDR5-5500

• LTE cat-15 4x4 MIMO

• NR sub6-GHz with a bandwidth of 120 MHz

• Embedded connectivity systems, including WLAN/BT/FM/GPS

• Up to FHD+ resolution (1,080 x 2,520)

• OpenGL ES 3.2 3D graphics accelerator

• ISP supports 80 MP @24 fps

• HEVC 2K@60 fps decoder

• HEVC 4K@30 fps encoder

• Voice codecs (FR, HR, EFR, AMR FR, AMR HR and wideband AMR and EVS NB/WB/SWB)

Figure 1-1 MT6855T Block diagram of advanced features

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Ball map view (top left)