Main features

－  Arm® Cortex®-M4F @108MHz, 135DMIPS, built-in 2KB instruction cache, supports Flash acceleration unit execution program 0 waiting

－  Encrypted memory

•  Up to 128KBytes eFlash, supports encrypted storage, partition management and data protection, supports hardware ECC verification, 100,000 erases, and 10 years of data maintenance

•  Up to 32Kbytes SRAM, support for hardware parity

－  Power consumption mode

•  Support Run, Sleep, LP Run, LP Sleep, Stop2, Standby modes

－  Low power consumption, magnetic flow metering module (LPRCNT), can operate in STOP2 state

－  High-performance analog interface

•  1 12bit 5Msps ADC, supports 16 channels

•  2 rail-to-rail op amps, built-in maximum 32x programmable gain amplification

•  2 high-speed analog comparators with built-in 64-stage adjustable comparison benchmark

•  1 12bit DAC

•  Internal 2.048V independent reference voltage reference source

－  Supports internal RC or external crystal clock inputs

－  Reset

•  Supports power-on/undervoltage/external pin reset

•  Supports dual watchdog reset and software reset

－  Supports up to 64 GPIOs

－  Communication interface

•  5 U(S)ART interfaces, including 3 USART interfaces (support 1xISO7816, 1xIrDA, LIN), and 2 UART interfaces

•  1 LPUART, supports STOP2 wake-up MCU in low power state

•  2 SPI interfaces, support I2S communication

•  2 I2C interfaces, master-slave mode can be matched

•  1 x USB2.0 Full Speed Device Interface

•  1 CAN 2.0A/B bus interface

－  Segment LCD driver interface

•  Supports a maximum of 320-segment (8x40) or 176-segment (4x44) monochrome passive LCD display

•  Flexible LCD refresh rate support (30Hz~102Hz)

•  Supports static 1/2, 1/3, 1/4, 1/8 duty cycles

•  Supports static 1/2, 1/3, 1/4 bias

•  Supports normal display in Stop2 mode

－  1 high-speed DMA controller, supports 8 channels

－  RTC real-time clock, supports leap year perpetual calendar, alarm clock events, periodic wake-up, and supports internal and external clock calibration

－  Timer counter

•  2 16bit advanced timing counters, 9.25nS control accuracy, support 6 complementary PWM outputs

•  5 16bit universal timing counters, support input capture/output comparison/PWM output

•  2 16bit basic timing counters

•  1 16bit low power timing counter, supports dual pulse counting, can work in STOP2 state

•  1 24bit SysTick

•  1 7bit window watchdog (WWDG)

•  1 12bit independent watchdog (IWDG)

－  Safety features

•  Built-in password algorithm hardware acceleration engine

•  Supports AES, DES, TDES, SHA1/224/256, SM1, SM3, SM4, SM7, MD5 algorithms

•  Flash storage encryption, multi-user partition management (MMU)

•  TRNG True Random Number Generator

•  CRC16/32 operation

•  Support write protection (WRP), multiple read protection (RDP) levels (L0/L1/L2)

•  Supports secure startup, program encryption download, and secure updates

•  Support external clock failure monitoring and anti-tamping monitoring

－  96-bit UID and 128-bit UCID

－  Highly reliable working environment:

•  1.8V ～ 3.6V/-40 ℃～ 105 ℃

•  ±4kV ESD（HBM）

Typical Applications

N32L43x series is mainly used for Smart water meter, Smart gas meter etc meter application.