Holtek HT32F1755

The Holtek HT32F1755 is an ARM Cortex-M3 processor - Up to 72 MHz operation frequency - Nested Vectored Interrupt Controller (NVIC) - 24-bit SysTick timer On-chip memory - 127 KB on-chip Flash Memory with Flash Memory Accelerator - 1 KB Flash Option Byte - 32 KB on-chip SRAM - Flexible booting mode supports bootloader Flash Memory Controller - Flash accelerator to obtain maximum efficiency - 32-bit word programming (ISP and IAP) - Flash protection capability to prevent illegal access Power supply, reset, and clocks - Single 3.3 V power supply (2.7 V to 3.6 V) - Built-in 1.8 V LDO regulator for core and peripherals - Supply supervisor (POR, BOD, LVD) - Ext. 4 to 16 MHz crystal osc. - Ext. 32,768 Hz crystal osc. - Int. 8 MHz RC osc. - Int. 32 kHz RC osc. - On-chip PLL for system clock Power management - 4 power saving modes (Sleep, Deep-Sleep 1, Deep-Sleep 2, Power-Down) - Independent clock gating bit for each peripherals - VBAT battery power supply for RTC and backup registers ADC - 12-bit SAR ADC engine - Up to 1 Msps conversion rate - 8 ext. analog input channels - 2.7 V ~ 3.6 V conversion range Analog Operational Amplifier/Comparator - 2 x Operational Amplifier or 2 x Comparator function - Supply voltage range: 2.7 V ~ 3.6 V IO ports - Up to 80 GPIOs - Port A ~ Port E are mapped on 16 ext. interrupts (EXTI) - Almost all IOs are 5 V-tolerant except analog inputs Timers - 1 x 16-bit Motor Control Timer (MCTM) - 2 x 16-bit General-Purpose Timer (GPTM) - 2 x 32-bit Basic Function Timer (BFTM) - 1 x Watchdog timer - 1 x Real Time Clock Communication interfaces - 1 x USB 2.0 Full Speed Device Controller with on-chip PHY - 1 x Smart Card (SCI) - 2 x I2C - 2 x SPI - 2 x USART PDMA - 12-channel PDMA controller - Support memory-to-peripheral, peripheral-to-memory and memory-to-memory transfer Debug support - Serial Wire/JTAG Debug Port (SWJ-DP) - 1-bit asynchronous trace (TRACESWO).