Holtek HT32F1655

The Holtek HT32F1655 is an ARM Cortex-M3 processor - Up to 72 MHz operation frequency - Nested Vectored Interrupt Controller (NVIC) - 24-bit SysTick timer On-chip memory - 128 KB on-chip Flash Memory with Flash Memory Accelerator - 1 KB Flash Option Byte - 32 KB on-chip SRAM - Flexible booting mode supports bootloader Power supply, reset, and clocks - Single 3.3 V power supply (2.7 V to 3.6 V) - Supply supervisor (POR, BOD, LVD) - External 4 to 16 MHz crystal oscillator - External 32,768 Hz crystal oscillator - Internal 8 MHz RC oscillator - Internal 32 kHz RC oscillator - 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 ADC - 12-bit SAR ADC engine - Up to 1 Msps conversion rate - 16 external analog input channels Analog Operational Amplifier/Comparator - 2 x Operational Amplifier or 2 x Comparator function 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 - 2 x 16-bit Motor Control Timer (MCTM) - 2 x 16-bit General-Purpose Timer (GPTM) with input capture or compare output function - 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 Interface (SCI) - 2 x I2C, support both master and slave mode - 2 x SPI, support both master and slave mode - 2 x USART - 2 x UART - 1 x I2S, support both master and slave mode External Bus Interface - EBI - Programmable interface for various memory types Cyclic Redundancy Check - CRC - Support CRC16, CCITT CRC16, IEEE-802.3 CRC32 PDMA - 8-channels PDMA controller Debug support - Serial Wire/JTAG Debug Port (SWJ-DP) - 1-bit asynchronous trace (TRACESWO).