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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, improves SPI flash access efficiency;

• MCU can control read-write of SPI flash when the Cache is locked;

• Internal RAM of MCU is 256 bytes, external RAM is 2K+512 bytes, the instruction space can be expanded 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;

• 32-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 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 when the main circuit is power failure.

• 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 able to be upgraded, can starting program from SPI flash;

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

• SDRAM controller.

• High-efficiency SDRAM Interface, supports operation with 16-bit data;

• 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, support host/device mode.

• 5 endpoints, three of which are INOUT type;

• Integrated DMA , supports real-time transfer, interrupt transfer, bulk transfer, and control transfer;

• Support USB wakeup and suspend;

• Support USB audio application.

• Integrated SD/MMC/SDIO controllers, supporting SD/MMC/SDIO protocol, general SPI supported.

• Integrated high-speed UART controller.

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

• Integrated two I2S control modules.

• Supporting 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 disc.

• Integrated 6-channel 10-bit ADC, can be used as keys, supporting MCU wake-up function.

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

Other

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

• Support ADPCM and MP3* encode.

• Able to embed EQ software.