HOLTEK HT32F50343-64LQFP

The Holtek microcontroller HT32F50343 is a 32-bit high-performance, low-power microcontroller based on the Arm Cortex®-M0+ processor core. The Cortex®-M0+ is a next-generation processor core that tightly integrates the Nested Vectored Interrupt Controller (NVIC), SysTick Timer, and advanced debug support.

The microcontroller operates at frequencies up to 60 MHz, leveraging a Flash accelerator for enhanced performance. It provides up to 64 KB of embedded Flash memory for program/data storage and up to 12 KB of embedded SRAM for system operation and application use. The microcontroller features a wide range of peripherals, including a hardware divider DIV, PDMA, ADC, I²C, UART, SPI, SLED, GPTM, PWM, SCTM, BFTM, CRC-16/32, RTC, WDT, USB2.0, and SW-DP (Serial Wire Debug Port). Several power-saving modes are provided, offering optimized flexibility in wake-up latency and power consumption — a key consideration for low-power applications.

• 32-bit Arm Cortex®-M0+ processor core
• Up to 60 MHz operating frequency
• Single-cycle multiplication
• Integrated Nested Vectored Interrupt Controller (NVIC)
• 24-bit SysTick timer
• Up to 64 KB on-chip Flash for instruction/data and option storage
• 12 KB on-chip SRAM
• Multiple boot mode support
• 32-bit word programming with ISP and IAP
• Flash protection against unauthorized access
• Power monitoring: POR/PDR; BOD; programmable LVD
• External 4~16 MHz crystal oscillator
• External 32.768 kHz crystal oscillator
• Internal 8 MHz RC oscillator adjustable to ±2% accuracy at 25℃
• Internal 32 kHz RC oscillator
• Independent clock dividers and gating bits for peripheral clock sources
• Flexible power supply configuration: VDD (2.5 V~5.5 V), I/O supply VDDIO (1.8 V~5.5 V)
• Built-in 1.5 V LDO regulator for CPU core, peripherals, and memory supply
• Three power domains: VDD, VDDIO, and 1.5 V VDD15
• Three power-saving modes: Sleep, Deep Sleep 1, and Deep Sleep 2
• 24-bit up-counter with programmable prescaler
• Alarm function
• Interrupt and wakeup events
• Up to 16 EXTI lines, each independently configurable for trigger source and type
• All GPIO pins selectable as EXTI trigger sources
• Trigger source types: high level, low level, falling edge, rising edge, or both edges
• Independent interrupt enable, wakeup enable, and status flag per EXTI line
• Software interrupt trigger mode per EXTI line
• Built-in deglitch filter to reject short pulses
• 12-bit SAR ADC core
• Up to 1 Msps conversion rate
• Up to 12 external analog input channels
• Up to 51 general-purpose I/O (GPIO) pins
• Port A, B, C, D mapped to 16 external interrupts – EXTI
• Configurable output drive current on nearly all I/O pins

• Gaming application controller
• Keyboard and mouse
• Consumer products
• Handheld devices
• LED lighting applications