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Architecture

• Dual-core structure formed by low power dissipation 8-bit MCU and high performance 32-bit RISC

• Performance of MCU core is 4 times better than traditional 51, the instruction set is compatible with traditional MCS-51 instruction set.

• CACHE+SPI structure for high SPI flash access efficiency;

• SPI flash read/write controlled by MCU when Cache is locked;

• Internal RAM of MCU is 256 bytes, external RAM is 2K+512 bytes, the instruction space can be expanded up to 8M byte through SPI flash.

• High-performance 32-bit RISC core, 6-level pipelines.

• Harvard cache architecture with separate 8KB Instruction and Data Cache, single-cycle multiplication/accumulation operations, on-chip debugging (OCD) supported.

• 2-bit instruction and data space, with MMU function, operating system supported. 

Clock & Power Manager

• External 32.768KHz and 12MHz oscillators;

• Built-in MCU PLL with 32.768KHz reference clock and System PLL12MHz reference clock, Audio PLL and USB PLL;

• Clock frequency division control, MCU is able to work at 9-level frequencies in range of 32.768KHz ~ 24MHz, while RISC at 15-level frequencies in the range of 30MHz ~ 162MHz.

• Single 3.3V power supply, built-in DC-DC and LDO modules, provided to RISC and MCU cores.

• RTC separately powered, with calendar function, 256-byte RAM which can save information during power outage of the main circuit.

• Multi low-power operating modes supported, such as stop mode. 

Memory Controller

• SPI flash controller.

• SPI flash 1/2-wire modes.

• Firmware in SPI flash update available, SPI flash start available.

• MCU program is able to be run in SPI flash, debugging code downloadable.

• SDRAM controller.

• High-efficiency SDRAM Interface, 16-bit data operating supported;

• Supporting SDRAM low-power modes, such as self-refresh, power down, etc.

• Packaged with SDRAM die of 1M*16-bit;

Peripherals

• On-chip USB full/low speed controller, host/device mode available:

• 5 endpoints, three of which are INOUT type.

• Integrated DMA, supports real-time transfer, interrupt transfer, bulk transfer, and controlled transfer.

• Support USB wakeup and suspend.

• Support USB audio application.

• Integrated SD/MMC/SDIO three-in-one controllers, supporting SD/MMC/SDIO protocol and general SPI interface.

• Integrated high-speed UART controller.

• Up to 4Mbps baud rate, with 64-byte buffer, DMA controlled data stream transmission.

• Communicating with Bluetooth baseband processing module.

• Integrated I2S control modules.

• Support sampling rate up to 24-bit@192KHz.

• DMA-controlled data stream transmission.

• Integrated SPDIF output, sampling rate up to 24-bit@96KHz, DMA controlled data stream transmission.

• Integrated one-channel 18-bit DAC, analog output LINEOUT_R and LINEOUT_L.

• Integrated I2C host/slave control interfaces;

• Integrated 4-channel PWM outputs;

• Integrated 16-bit audio ADC.

• 2 channels, used for MIC input, supporting audio superposition and simple reverberation processing;

• Supporting saving the coded recorded data to SD or U disk;

• Integrated 6-channel 10-bit ADC, keys and MCU wake-up function available.

• Integrated programmable GPIO, four-grade drive current configurable (2mA/4mA/8mA/24mA), pull-up or open-drain configurable.

Others

• Support ADPCM, MP3*, WMA*, LC-AAC*, OGG, FLAC*, APE* decode.

• Support ADPCM and MP3* encode.

• Able to embedded EQ software.

• Embedded the bluetooth protocol stack, supports profile such as A2DP, HFP, AVRCP, and PBAP.

• Built-in noise suppression and echo cancellation algorithm to realize the Bluetooth voice communication function