M251EC2AE

The NuMicro® M251EC2AE is a low-power microcontroller based on Arm® Cortex®-M23 core for Armv8-M architecture. It runs up to 48 MHz with 32 Kbytes embedded Flash memory and 8 Kbytes embedded SRAM , 4 Kbytes Flash loader memory ( LDROM ) for In-System Programming ( ISP ) , The 32-bit low-power microcontrollers supports wide supply voltage from 1.8 ~ 5.5 V and operating temperature range from - 40 ℃ ~ + 105 ℃ .

The NuMicro® M251EC2AE behaves low power consumption in Normal Run mode 138 μA / MHz at 48 MHz , Idle mode 60 μA / MHz , power down mode 2.5 μA ( RTC on, RAM retention ) , power down mode 1.7 μA ( RTC off, RAM retention ) and Deep Power-down mode. It’s low power, wide supply voltage and fast wake-up features make it suitable for battery-powered IoT applications.

The NuMicro® M251EC2AE series provides 1-region programable eXecute-Only-Memory ( XOM ) to secure critical program codes. Accompany with 96-bit Unique Identification ( UID ) and 128-bit Unique Customer Identification ( UCID ) to enhance the product security.

The NuMicro® M251EC2AE is equipped with plenty of peripherals such as Timers, Watchdog Timers, RTC, GPIOs x50, up to 24 channels of PWM, Universal Serial Control Interface (USCI) x2, GPIOs x23, up to 11 channels of PWM, Universal Serial Control Interface (USCI) x1, UART x2, QSPI x1, I²C x2, ISO-7816-3 x1, PDMA x5, makes it highly suitable for connecting comprehensive external modules and LED lighting control. The M251EC2AE integrates high performance analog front-end circuit blocks, such as 9 channels of 12-bit 880 kSPS ADC, temperature sensor, low voltage reset ( LVR ) and brown-out detector ( BOD ) to enhance product performance, reduce external components and form factor simultaneously.

The package types of the M251EC2AE is TSSOP28 ( 4.4 mm x 9.7 mm ). Pin-to-pin compatible in same package makes optimizing product features and performance easily.

Target Application:

Smart Home / Smart Home Appliance
Industrial Control / Industrial Automation
Smart City
IoT Device
Security Alarm System
Electronic Payments
Communication Modules
Portable Wireless Data Collector
Smart Door lock
Handheld Medical Device
( GPS ) Location Tracker
Electronic Shelf Labels ( ESL )

Key Features:

• Operating Characteristics
- Voltage range: 1.8 V ~ 5.5 V
- Temperature range: - 40 ℃ ~ 105 ℃

• Core
- Arm® Cortex®-M23, Armv8-M, 48 MHz
- 32-bit H / W multiplier / divider

• Memories
- 32 KB Flash
- 8 KB SRAM
- 4 KB LDROM
- 1-region eXecute-Only-Memory ( XOM )
- ISP / ICP / IAP programming

• Clocks
- 4 ~ 32 MHz external high speed crystal oscillator ( HXT ) for precise timing operation
- 32.768 kHz external low speed crystal oscillator ( LXT ) for RTC function and low-power system operation
- 48 MHz internal high speed RC oscillator ( HIRC ) for system operation
- 4.032 MHz internal high speed RC oscillator ( MIRC ) for system operation
- 38.4 kHz internal low speed RC oscillator ( LIRC ) for Watchdog Timer and wake-up operation.

• Power management
- Integrated with Power-on Reset, Brown-out Reset and Low Voltage Reset
- Built-in LDO

• Low Power Consumption
- 138 μA / MHz in operating mode
- 60 μA / MHz in idle mode
- 2.5 μA in Power down mode ( RTC on, RAM retention )
- 1.7 μA in Power down mode ( RTC off, RAM retention )
- 1.45 μA in Deep Power down mode

• Timers
- Up to 4 * 32-bit timers

• PDMA
- 5 channels

• PWM
- 11-channels PWM
- Supports trigger ADC
- Supports maximum clock frequency up to 48 MHz
- Supports independent mode for PWM output / Capture input channel
- Supports complementary mode for 3 complementary paired PWM output channel

• Analog
- 9 channels 12-bit 880 kSPS ADC

• Communication interfaces
- 1 sets of USCI Configured as UART, SPI or I²C)
- 2 sets of UART interface
- 1 set of QSPI interface
- 2 sets of I²C interfaces
- 1 set of Smart Card Interface (ISO-7816-3)

• 96-bit Unique ID ( UID )

• 128-bit Unique Customer ID ( UCID )

• Packages
- TSSOP28 ( 4.4 mm x 9.7 mm )