The STM32F091xB/xC microcontrollers incorporate the high-performance ARM®Cortex®-M0 32-bit RISC core operating at up to 48 MHz frequency, high-speed embedded memories (up to 256 Kbytes of Flash memory and 32 Kbytes of SRAM), and an extensive range of enhanced peripherals and I/Os. The device offers standard communication interfaces (two I2Cs, two SPIs/one I2S, one HDMI CEC and up to eight USARTs), one CAN, one 12-bit ADC, one 12-bit DAC with two channels, seven 16-bit timers, one 32-bit timer and an advanced-control PWM timer.

The STM32F091xB/xC microcontrollers operate in the -40 to +85 °C and -40 to +105 °C temperature ranges, from a 2.0 to 3.6 V power supply. A comprehensive set of power-saving modes allows the design of low-power applications.

The STM32F091xB/xC microcontrollers include devices in seven different packages ranging from 48 pins to 100 pins with a die form also available upon request. Depending on the device chosen, different sets of peripherals are included.

These features make the STM32F091xB/xC microcontrollers suitable for a wide range of applications such as application control and user interfaces, hand-held equipment, A/V receivers and digital TV, PC peripherals, gaming and GPS platforms, industrial applications, PLCs, inverters, printers, scanners, alarm systems, video intercoms and HVACs.

Key Features

• Core: ARM® 32-bit Cortex® -M0 CPU, frequency up to 48 MHz
• Memories
  • 128 to 256 Kbytes of Flash memory
  • 32 Kbytes of SRAM with HW parity
• CRC calculation unit
• Reset and power management
  • Digital & I/Os supply: VDD = 2.0 V to 3.6 V
  • Analog supply: VDDA = VDD to 3.6 V
  • Power-on/Power down reset (POR/PDR)
  • Programmable voltage detector (PVD)
  • Low power modes: Sleep, Stop, 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 x6 PLL option
  • Internal 40 kHz RC oscillator
  • Internal 48 MHz oscillator with automatic trimming based on ext. synchronization
• Up to 88 fast I/Os
  • All mappable on external interrupt vectors
  • Up to 69 I/Os with 5V-tolerant capability and 19 with independent supply VDDIO2
• 12-channel DMA controller
• One 12-bit, 1.0 μs ADC (up to 16 channels)
  • Conversion range: 0 to 3.6 V
  • Separate analog supply: 2.4 V to 3.6 V
• One 12-bit D/A converter (with 2 channels)
• Two fast low-power analog comparators with programmable input and output
• Up to 24 capacitive sensing channels for touchkey, linear and rotary touch sensors
• Calendar RTC with alarm and periodic wakeup from Stop/Standby
• 12 timers
  • One 16-bit advanced-control timer for 6 channel PWM output
  • One 32-bit and seven 16-bit timers, with up to 4 IC/OC, OCN, usable for IR control decoding or DAC control
  • Independent and system watchdog timers
  • SysTick timer
• Communication interfaces
  • Two I2 C interfaces supporting Fast Mode Plus (1 Mbit/s) with 20 mA current sink, one supporting SMBus/PMBus and wakeup
  • Up to eight USARTs supporting master synchronous SPI and modem control, three with ISO7816 interface, LIN, IrDA, auto baud rate detection and wakeup feature
  • Two SPIs (18 Mbit/s) with 4 to 16 programmable bit frames, and with I2 S interface multiplexed
  • CAN interface
• HDMI CEC wakeup on header reception
• Serial wire debug (SWD)
• 96-bit unique ID
• All packages ECOPACK® 2