Features
• Core: Arm® 32-bit Cortex®-M4 CPU with FPU (72 MHz max.), single-cycle multiplication and HW division, DSP instruction
• Memories
– 32 to 64 Kbytes of Flash memory
– 16 Kbytes of SRAM on data bus
• CRC calculation unit
• Reset and power management
– VDD, VDDA voltage range: 2.0 to 3.6 V
– Power-on/Power down reset (POR/PDR)
– Programmable voltage detector (PVD)
– Low-power: Sleep, Stop, and Standby
– VBAT supply for RTC and backup registers
• Clock management
– 4 to 32 MHz crystal oscillator
– 32 kHz oscillator for RTC with calibration
– Internal 8 MHz RC with x 16 PLL option
– Internal 40 kHz oscillator
• Up to 51 fast I/O ports, all mappable on external interrupt vectors, several 5 V-tolerant
• Interconnect matrix
• 7-channel DMA controller supporting timers, ADCs, SPIs, I2Cs, USARTs and DAC
• 1 × ADC 0.20 μs (up to 15 channels) with selectable resolution of 12/10/8/6 bits, 0 to 3.6 V conversion range, single ended/differential mode, separate analog supply from 2.0 to 3.6 V
• Temperature sensor
• 1 x 12-bit DAC channel with analog supply from 2.4 to 3.6 V
• Three fast rail-to-rail analog comparators with analog supply from 2.0 to 3.6 V
• 1 x operational amplifier that can be used in PGA mode, all terminal accessible with analog supply from 2.4 to 3.6 V
• Up to 18 capacitive sensing channels supporting touchkey, linear and rotary sensors
• Up to 9 timers
– One 32-bit timer with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input
– One 16-bit 6-channel advanced-control timer, with up to 6 PWM channels, deadtime generation and emergency stop
– Three 16-bit timers with IC/OC/OCN or PWM, deadtime gen. and emergency stop
– One 16-bit basic timer to drive the DAC
– 2 watchdog timers (independent, window)
– SysTick timer: 24-bit downcounter
• Calendar RTC with alarm, periodic wakeup from Stop/Standby
• Communication interfaces
– Three I2Cs with 20 mA current sink to support Fast mode plus
– Up to 3 USARTs, 1 with ISO 7816 I/F, auto baudrate detect and Dual clock domain
– Up to two SPIs with multiplexed full duplex I2S
– Infrared transmitter
• Serial wire debug (SWD), JTAG
• 96-bit unique ID