HOLTEK HT32F50231-44LQFP

This series of microcontrollers are 32-bit high-performance, low-power MCUs based on the Arm Cortex-M0+ processor core. The Cortex-M0+ is a next-generation processor core that tightly integrates a Nested Vectored Interrupt Controller (NVIC), SysTick Timer, and advanced debug support. This series of MCUs can operate at frequencies up to 20 MHz, leveraging a Flash accelerator for enhanced performance. They provide up to 64 KB of embedded Flash memory for program/data storage and up to 8 KB of embedded SRAM for system operation and application use. This series of MCUs features a wide range of peripherals, including a hardware divider DIV, ADC, I2C, USART, UART, SPI, MCTM, GPTM, PWM, BFTM, CRC-16/32, RTC, WDT, and SW-DP (Serial Wire Debug Port). Several power-saving modes are provided, offering optimized flexibility in terms of wake-up latency and power consumption — a key consideration for low-power applications.

• 32-bit Arm Cortex-M0+ processor core
• Up to 20 MHz operating frequency with single-cycle multiplication
• Integrated NVIC
• 24-bit SysTick timer
• Up to 64 KB on-chip Flash for instruction/data and option storage
• Up to 8 KB on-chip SRAM
• Multiple boot modes supported
• 32-bit word programming with ISP and IAP support
• Flash protection against unauthorized access
• POR/PDR
• BOD
• LVD
• External 4~20 MHz crystal oscillator
• External 32.768 kHz crystal oscillator
• Internal 20 MHz RC oscillator adjustable to ±2% accuracy at 25℃
• Internal 32 kHz RC oscillator
• Independent clock dividers and gating bits per peripheral clock source
• Flexible power supply: VDD (2.5 V~5.5 V), ΔVDDIO for I/O supply (1.8 V~5.5 V)
• Integrated 1.5 V LDO regulator for MCU core, peripheral, and memory supply
• VDD, VDDIO, and VCORE power domains
• Three low-power modes: Sleep, Deep Sleep 1, Deep Sleep 2
• 24-bit up-counter with programmable prescaler, alarm interrupt, and wake-up event
• Up to 16 EXTI input lines with configurable trigger sources and types
• All GPIO pins selectable as EXTI trigger sources
• Trigger types: high level, low level, falling edge, rising edge, or both edges
• Independent interrupt enable, wake-up enable, and status flag per EXTI input line
• Software interrupt trigger mode per EXTI input line
• Built-in glitch filter for short pulse rejection
• 32-bit signed/unsigned divider
• 8 clock cycles for operation, 1 clock cycle for load
• Divide-by-zero error flag
• 12-bit SAR ADC core, up to 1 Msps conversion rate, up to 12 external analog input channels
• Up to 40 GPIO
• Ports A, B, C mapped to 16 EXTI lines
• Programmable output drive current on nearly all I/O pins
• 32-bit compare/match up-counter — no input/output control
• One-shot mode — stops counting after compare match
• Repeat mode — restarts counting after compare match

• White goods application control
• Power supply monitoring
• Alarm systems
• Consumer products
• Handheld devices
• Data logging applications
• Motor controllers