The Numicro MS51 series is an enhanced 1T 8051 core microcontroller with built-in Flash, operating at up to 24 MHz. Available with 8/16/32 KB FLASH and 1/2 KB SRAM and built-in 10 kHz and 24 MHz high precision clock source, operating voltage from 2.4V to 5.5V, and conforms to -40 ºC to 105 ºC industrial operating temperature.

This series offers a wide range of packages from 10 to 32 pins for different applications.

Target Applications:

Home automation, industrial control, Internet of Things devices, battery management, wireless charging, etc.

Main Features:

CPU

- Full static 8-bit 1T 8051 core CMOS microcontroller

- The instruction set is fully compatible with MCS-51

- Level 4 priority interrupt configuration

• Working conditions

- Wide voltage operating range 2.4V to 5.5V

- Wide operating frequency up to 24 MHz

- Industrial working temperature -40 ºC to + 105 ºC

• memory

- APROM user program code area up to 32 K bytes

- 4 K / 3 K / 2 K / 1 K / 0 K byte LDROM boot code area can be configured flexibly by users

- Flash supports up to 100,000 writes

- Built-in IAP programming

-256 byte in-chip direct access RAM

- Additional up to 2 K bytes of in-chip indirect access RAM (XRAM) is read and written by the MOVX instruction

The clock source,

-

24 MHz high speed internal oscillator with ± 1% accuracy at 5.0V power supply and ± 2% accuracy at full operating conditions

-16 MHz high speed internal oscillator with ± 1% accuracy at 5.0V power supply and ± 2% accuracy at full operating conditions

-10 kHz low speed internal oscillator with factory accuracy of ± 10 % grade

- Supports external clock input

• Power management configuration

- Support two power saving modes: idle mode and power down mode

- Power down mode typical power consumption 6 uA

• the timer

- Two sets of 16-bit timers/counters 0 and 1, compatible with standard 8051

- Six pairs, 12 channel PWM, 16 bit resolution, with different operating modes and Fault Brake function

- A set of self-wake-up timer (WKT) for self-wake-up in low power mode

- A set of Watchdogs (WDT) with an internal 10 kHz independent clock as the clock source

• Communication interface

- Two sets of full duplex serial port, with frame error detection and automatic address identification function.TXD and RXD pins of UART0 can be replaced by software

- Up to three sets of SmartCard interfaces, support ISO7816-3 and support UART communication

- One set of SPI buses, maximum transfer rate of 12 Mbps in both host mode and slave mode

- A set of I²C buses with a maximum transfer rate of 400 KBPS in both host and slave modes

• simulation

- A set of ADCs up to 15 and 12 bits, with a sampling rate of up to 500 kSPS, supporting continuous sampling

• Up to 30 GPIOs with support for interrupts

• Strong ESD and EFT capabilities

• 96-bit unique identifier (UID)

• 128-bit Unique Customer Identifier (UCID)

• 2-byte (16-bit) PDID

• Development tools

- On-chip debugging (OCD simulation) based on KeilTM and IAR development environment

- New Tang in circuit programming (ICP programming)

- New Tang in the system programming (ISP programming), through UART chip burning