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MCU Description

MCU (Microcontroller Unit) is also called Single Chip Microcomputer. MCU is CPU with the appropriately-reduced frequency and specification, integrated with the peripheral interfaces, like memory, Timer, USB, A/D convertor, UART, PLC, and DMA, etc. Even the LCD driver circuit is integrated into single chip to realize the chip-level computer. Different combinations are carried out for different application fields.


V85xx is a MCU chip specialized for smart meter. It integrated Cortex-M0 CPU, Flash/RAM memory, real-time clock module with independent power supply, hardware encryption module, LCD, GPIO, and all kinds of communication interfaces. It is a multi-functional MCU with the high cost-performance ratio. 

· ARM Cortex M0 core

· 256k Flash/32k RAM

· Operation frequency up to 30MHz

· Independent RTC power supply, temperature compensation RTC calibration to achieve 0.1 ppm accuracy, power consumption less

than 1 μA · One 12-bit multi-input ADC

· Two analog input comparators

· Three DMA controllers

· Built-in hardware AES256/192/128 encryption module

· Up to six UARTs, including two independent low-power consumption UARTs

· LCD with 4x42/6x40/8x38 segments

· Flexible I/O mapping

· Power supply2.0V ~ 5.5V

· Operating temperature-40°C ~ 85°C

· PackageLQFP100/80/64

· Reliability and Security Protection Measurement

· Flash protection

Read protectionDebugging port accessing control

Write protectionISP password protection

· Abnormal detection and alarming mechanism


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