M254MD2AE

The NuMicro M254MD2AE 32-bit microcontroller is based on Arm Cortex-M23 core using Armv8-M architecture with COM/SEG LCD driver. It runs up to 48 MHz and features 64 Kbytes Flash memory, 8 Kbytets SRAM, 1.75V ~ 5.5V wide operating voltage, 5V I/O tolerance, and -40℃ to 105℃ operating temperature.

M254MD2AE includes a 8 x 16, 6 x 18, 4 x 20 COM/SEG LCD driver with selectable bias voltage and duty, and it also built-in charge-pump to support 3V to 5V wide voltage of LCD panel

M254MD2AE provides plenty of peripherals such as Timers, Watchdog Timers, RTC, 5 channels of PDMA, 3 sets of UART, 1 setof Universal Serial Control Interface (USCI), 1 set of SPI/ I²S, 1 set of I²C, 1 set of ISO-7816-3, 6 channels of basic PWM, making it highly suitable for connecting comprehensive external modules. It also integrates high performance analog circuit, such as 12 channels of 12-bit 730 kSPS ADC, and a temperature sensor to reduce external components.

Supported packages LQFP44 (10mm x 10mm) with pin-compatible for different part numbers make the system design and parts change easily.

Target Application:

Handheld meter
Thermostat
Smart Home / Home Appliance
Industrial Control / Industrial Automation
Temperature/Humidity Logger
Key Features:

•Operating Characteristics
 
-Voltage range: 1.75V ~ 5.5V
 
-Temperature range: - 40 ℃ ~ 105 ℃
 
-EFT 4.4 KV
 
-ESD HBM 7 KV
 
 
•Core
 
-Arm Cortex-M23 core using Armv8-M architecture, running up to 48 MHz, without TrustZone
 
-32-bit hardware multiplier/divider
 
 
 
•Memories
 
-64 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 (Factory pre-trimmed to ±0.25% and frequency deviation ±2.5% over entire temperature from -40°C ~ 105 °C)
 
-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
 
 
 
•COM/SEG LCD Driver
 
-8 x16, 6 x 18, 4 x 20 COM/SEG LCD Driver
 
-Built-in charge-pump feature
 
-Supports 3V to 5V LCD panel
 
-Supports 1/2, 1/3 and 1/4 bias voltage
 
-Supports 1/4 duty, 1/6 duty and 1/8 duty
 
 
 
•Power management
 
-Integrated with Power-on Reset, Brown-out Reset and Low Voltage Reset
 
-Built-in LDO Integrated with Power-on Reset, Brown-out Reset and Low Voltage Reset
 
 
•Low Power Consumption
 
-110 μA/MHz in operating mode
 
-3.8 μA in Power-down mode (RTC on, RAM retention)
 
-2.2 μA in Power-down mode (RTC off, RAM retention)
 
-1.6 μA in Deep Power-down mode
 
 
 
•Timers
 
-Four 32-bit timers
 
-One 24-bit SysTick timer
 
-One independent watchdog
 
-One window watchdog
 
-RTC with Calendar and Alarm
 
 
 
•PDMA
 
5 channels
 
 
 
•Analog
 
-12 channels of 12-bit 730 kSPS ADC
 
-2 sets of rail-to-rail analog comparators (ACMP)
 
 
 
•Communication interfaces
 
-3 sets of UART interfaces
 
-1 set of I²C interfaces
 
-1 set of SPI/I²S
 
-1 set of Smart Card Interface (ISO-7816-3)
 
-1 set of USCI (configured as UART, SPI or I²C)
 
 
 
•96-bit Unique ID ( UID ) 
 
 
•128-bit Unique Customer ID ( UCID ) 
 
 
•Packages
 
LQFP44 (10mm x 10mm)