Features

Core

• 32-bit ARM^® Cortex™-M3 processor core
• Up to 72MHz operation frequency
• 1.25 DMIPS/MHz (Dhrystone 2.1)
• Single-cycle multiplication and hardware division
• Integrated Nested Vectored Interrupt Controller (NVIC)
• 24-bit SysTick timer

On-chip Memory

• 128KB on-chip Flash memory for instruction/data and options storage
• up to 64KB on-chip SRAM
• Supports multiple boot modes

Flash Memory Controller

• Flash accelerator for maximum efficiency
• 32-bit word programming with In System Programming Interface (ISP) and In Application Programming (IAP)
• Flash protection capability to prevent illegal access

Reset Control Unit

• Supply supervisor:
  --  Power-on Reset - POR
  --  Brown-out Detector - BOD
  --  Programmable Low Voltage Detector -  LVD

Clock Control Unit

• External 4 to 16MHz crystal oscillator
• External 32,768Hz crystal oscillator
• Internal 8MHz RC oscillator trimmed to ±2% accuracy at 3.3V operating voltage and 25°C operating temperature
• Internal 32kHz RC oscillator
• Integrated system clock PLL
• Independent clock gating bits for peripheral clock sources

Power Management

• Single 3.3V power supply: 2.7V to 3.6V
• Integrated 1.8V LDO regulator for core and peripheral power supply
• V_BAT battery power supply for RTC and backup registers
• Three power domains: 3.3V, 1.8V and Backup
• Four power saving modes: Sleep, Deep-Sleep1, Deep-Sleep2, Power-Down

Analog to Digital Converter

• 12-bit SAR ADC engine
• Up to 1Msps conversion rate - 1us at 56MHz, 1.17us at 72MHz
• 8 external analog input channels
• Supply voltage range: 2.7 V ~ 3.6 V
• Conversion range: V_REF+ ~ V_REF-

Analog Operational Amplifier/Comparator

• Two Operational Amplifiers or Comparator functions which are software configurable
• Supply voltage range: 2.7V ~ 3.6V

I/O Ports

• Up to 80 GPIOs
• Port A, B, C, D, E are mapped as 16 external interrupts - EXTI
• Almost all I/O pins are 5V-tolerant except for pins shared with analog inputs

PWM Generation and Capture Timers -- GPTM

• Two 16-bit General-Purpose Timers - GPTM
• Up to 4-channel PWM Compare Output or Input Capture function for each GPTM
• External trigger input

Motor Control Timer -- MCTM

• Single 16-bit up, down, up/down auto-reload counter
• 16-bit programmable prescaler allowing dividing the counter clock frequency by any factor between 1 and 65536
• Input Capture function
• Compare Match Output
• PWM waveform generation with Edge and Centre-aligned Modes
• Single Pulse Mode Output
• Complementary Outputs with programmable dead-time insertion
• Encoder interface controller with two inputs using quadrature decoder
• Support 3-phase motor control and hall sensor interface
• Brake input to force the timer's output signals into a reset or fixed condition

Basic Function Timer -- BFTM

• Two 32-bit compare/match count-up counters - no I/O control features
• One shot mode - counting stops after a match condition
• Repetitive mode - restart counter after a match condition

Watchdog Timer

• 12-bit down counter with 3-bit prescaler
• Interrupt or reset event for the system
• Programmable watchdog timer window function
• Registers write protection function

Real Time Clock

• 32-bit up-counter with a programmable prescaler
• Alarm function
• Interrupt and Wake-up event

Inter-integrated Circuit -- I²C

• Support both master and slave mode with a frequency of up to 1MHz
• Provide an arbitration function and clock synchronization
• Supports 7-bit and 10-bit addressing mode and general call addressing
• Supports slave multi-addressing mode with maskable address

Serial Peripheral Interface -- SPI

• Supports both master and slave mode
• Frequency of up to 36MHz for master mode and 18MHz for slave mode
• FIFO Depth: 8 levels
• Multi-master and multi-slave operation

Universal Synchronous Asynchronous Receiver Transmitter -- USART

• Operating frequency up to 4.5MHz
• Supports both asynchronous and clocked synchronous serial communication modes
• IrDA SIR encoder and decoder
• RS485 mode with output enable control
• Full Modem function for USART0
• Auto hardware flow control mode - RTS, CTS
• FIFO Depth: 16x9 bits for both receiver and transmitter

Smart Card Interface -- SCI

• Support ISO 7816-3 standard
• Character mode
• Single transmit buffer and single receive buffer
• 11-bit ETU (Elementary Time Unit) counter
• 9-bit guard time counter
• 24-bit general purpose waiting time counter
• Parity generation and checking
• Automatic character retry on parity error detection in transmission and reception modes

Peripheral Direct Memory Access -- PDMA

• 12 channels with trigger source grouping
• Supports Single and block transfer mode
• 8/16/32-bit width data transfer
• Supports Address increment, decrement or fixed mode
• 4-level programmable channel priority
• Auto reload mode
• Supports trigger source: CSIF, ADC, SPI, USART, I²C, GPTM, MCTM, SCI and software

Universal Serial Bus Device Controller -- USB

• Complies with USB 2.0 full-speed (12Mbps) specification
• On-chip USB full-speed transceiver
• 1 control endpoint (EP0) for control transfer
• 3 single-buffered endpoints for bulk and interrupt transfer
• 4 double-buffered endpoints for bulk, interrupt and isochronous transfer
• 1024 bytes EP-SRAM used as the endpoint data buffers

CMOS Sensor Interface -- CSIF (HT32F2755 only)

• Up to 2048x2048 input resolution
• Supports 8-bit YUV422 and Raw RGB formats
• Up to 24MHz input pixel clock frequency
• Multi VSYNC and HSYNC settings for image capture
• Hardware window capture function
• Fractional hardware sub-sample function
• Dual FIFOs each with a capacity of 8x32 bits which can be read by the PDMA or CPU

Debug Support

• Serial Wire or JTAG Debug Port SWJ-DP
• 6 instruction comparators and 2 literal comparators for hardware breakpoint or code/literal patch
• 4 comparators for hardware watchpoints
• 1-bit asynchronous trace - TRACESWO

Package and Operation Temperature

• 48/64/100-pin LQFP packages
• Operation temperature range: -40°C to +85°C