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VM85XX ARM Cortex-M0+
The VM85xx is a single-chip low-power consumption microcontroller based on eFlash technology. It integrates a Cortex-M0+ core with a maximum operating frequency of 48MHz high-speed embedded memory and multiple communication interfaces including I2C UART and SPI. Additionally it features an integrated ADC TIMER WDT and RTC modules. The VM85xx supports various low-power consumption operating modes with the operating current in DeepSleep mode being less than 0.5uA. It also supports RTC calibration and compensation making it well-suited for low-power consumption terminal applications such as digital panel meters and DIN-Rail meters.
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Features

1. Cost-effective Design
Resource Optimization: 64KB FLASH; 4KB SRAM
Package Optimization: TSSOP20
Process Upgrade: 90nm eFlash
2. Cortex-M0+ Core and Wide Operating Voltage
Core: Cortex-M0+ with a maximum operating frequency of 48MHz
Low-Power Modes: Sleep DeepSleep
Operating Voltage: 1.62V to 5.5V
3. Support Multiple Functions
I/O Interfaces: Up to 17 I/O ports all with interrupt and wake-up capabilities supporting hysteresis and pull-up input as well as push-pull and open-drain output.
12-bit ADC: Maximum conversion speed of 2M SPS with individually configurable sampling times for each sequence channel.
Dual Voltage Comparators
RTC and Calendar: Supports wake-up from Sleep/DeepSleep modes.
4. High-Precision Internal Clocks
48MHz RC Oscillator: ±2% accuracy over the full temperature range
32kHz RC Oscillator: ±3% accuracy over the full temperature range
5. Enhanced Security Features
Secure Operation Library Protection
Flash Protection: Write and read protection
CRC Hardware Calculation Unit

Application
Digital panel meters DIN-Rail meters and other low-power consumption terminal products.
Device family