New Enhanced Low Power Microcontroller For Many Kinds Of Applications


This series offers a range of memory with 16/32/64KB Flash memory and 1/2/4KB SRAM, providing package types from 10 to 64 pins

Nuvoton Technology Corp., a leading microcontroller provider, announces the NuMicro® low power enhanced 1T 8051 based ML51 series microcontroller.

NuMicro® ML51 series supports power down current below 1uA, power consumption is down to 80µA/MHz in normal run mode. This series operates at a wide continuous voltage range of 1.8V~5.5V and -40°C ~ +105°C temperature operation.


It offers 4 power modes: normal run mode, low power run mode, low power idle mode and power down mode with flexible wake-up sources to achieve the lowest possible power consumption. Both low power run mode and low power idle mode run at 38.4kHz LIRC (with +/- 1% accuracy at room temperature), and allow UART up to 9600 baud rate in these two low power operation modes; the power consumption in low power idle mode is down to 13uA and in power down mode the leakage current is less than 1uA.

To protect customer’s intellectual property, the ML51 series provides several mechanisms, by using flash lock bit can prevent program from being read out by external programmer, 128 Bytes SPROM (Secure Protection ROM), 96-bit UID (Unique Identification), 128-bit UCID (Unique Customer Identification).

Key Features

  • Supports up to 24MHz operation frequency.
  • 8 channels of 12-bit ADC.
  • 4 levels of internal reference voltage.
  • Analog comparator for comparing voltage rapidly and Direct Memory Access(DMA) controller for power saving and speed up data transfer.
  • 2 sets of UART, 2 sets of smart card interface, 2 sets of I²C, 2 sets of SPI, and higher than 20mA driving capability for each IO pin.
Expansion Of The Digital Board Level Pressure Sensor Series

Development Tools

Nuvoton provides easy-to-use development tools such as Nu-Link/Nu-Link-Pro/Nu-Link2, which supports advanced debug function, PinConfig for multi-function pin setting, PinView for showing pin status in real time, BSP driver and sample codes. The IDE supports Keil C-51 and IAR EW8051, which can debug, trace and analyze your program on the development board.


The NuMicro ML51 series with 16~32KB flash microcontrollers are available now, offering several packages including MSOP10, TSSOP14, TSSOP20, QFN20, TSSOP28, QFN33, and LQFP32.

The ML51 series microcontrollers and its development tools can be ordered from Nuvoton’s official online store.

NK‐ML51 evaluation board is available online now for 100% emulation and on‐board debugging.



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