M256KE3AE

The NuMicro M256KE3AE 32-bit microcontroller is based on Arm Cortex-M23 core using Armv8-M architecture with COM/SEG LCD driver and capacitive touch sensing function. It runs up to 48 MHz and features 128 Kbytes Flash, 16 Kbytets SRAM, 1.75V ~ 5.5V wide operating voltage, 5V I/O tolerance, and -40℃ to +105℃ operating temperature.

M256KE3AE includes a 8 x 44, 6 x 46, 4 x 48 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; Capacitive touch sensing function with up to 16 touch-keys with single-scan or programmable periodic key-scans is also supported.

M256KE3AE 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 16 channels of 12-bit 730 kSPS ADC, and a temperature sensor to reduce external components.

Supported packages LQFP128 (14mm x 14mm) with pin-compatible for different part numbers make the system design and parts change easily.

Applications

• 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
  • 128 KB Flash
  • 16 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 x 44, 6 x 46 & 4 x 48 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
• Capacitive Touch Sensing
  • Up to 16 touch keys with single-scan or programmable periodic key-scans features
• 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
  • Built-in LDO
  • Support RTC with independent V_BAT voltage source pin
• 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
  • 16 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
  • LQFP128 ( 14 mm x 14 mm )

Technical Documents

• For more details, please visit Nuvoton Official Website: GO