The STM32F042x microcontrollers incorporate the high-performance ARM Cortex -M0 32-bit RISC core operating at a 48 MHz frequency, high-speed embedded memories (up to 32 Kbytes of Flash memory and 6 Kbytes of SRAM), and an extensive range of enhanced peripherals and I/Os. All devices offer standard communication interfaces (one I²C, two SPIs/one I²S, one HDMI CEC and two USARTs), one USB Full speed device (crystal-less), one CAN, one 12-bit ADC, four general-purpose 16-bit timers, a 32-bit timer and an advanced-control PWM timer.The STM32F042x 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 STM32F042x microcontrollers include devices in seven different packages ranging from 20 pins to 48 pins with a die form also available upon request. Depending on the device chosen, different sets of peripherals are included. The description below provides an overview of the complete range of STM32F042x peripherals proposed.These features make the STM32F042x microcontrollers suitable for a wide range of applications such as application control and user interfaces, handheld 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.
Core: ARM®32-bit Cortex®-M0 CPU, frequency up to 48 MHz
Memories
16 to 32 Kbytes of Flash memory
6 Kbytes of SRAM with HW parity
CRC calculation unit
Reset and power management
Digital and I/Os supply: VDD= 2 V to 3.6 V
Analog supply: VDDA= VDDto 3.6 V
Selected I/Os: VDDIO2= 1.65 V to 3.6 V
Power-on/Power down reset (POR/PDR)
Programmable voltage detector (PVD)
Low power modes: Sleep, Stop, Standby
VBATsupply 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 37 fast I/Os
All mappable on external interrupt vectors
Up to 37 I/Os with 5 V tolerant capability and 8 with independent supply VDDIO2
5-channel DMA controller
One 12-bit, 1.0 µs ADC (up to 10 channels)
Conversion range: 0 to 3.6 V
Separate analog supply: 2.4 V to 3.6 V
Up to 14 capacitive sensing channels for touchkey, linear and rotary touch sensors
Calendar RTC with alarm and periodic wakeup from Stop/Standby
Nine timers
One 16-bit advanced-control timer for six channel PWM output
One 32-bit and four 16-bit timers, with up to four IC/OC, OCN, usable for IR control decoding
Independent and system watchdog timers
SysTick timer
Communication interfaces
One I²C interface supporting Fast Mode Plus (1 Mbit/s) with 20 mA current sink, SMBus/PMBus and wakeup
Two USARTs supporting master synchronous SPI and modem control; one with ISO7816 interface, LIN, IrDA, auto baud rate detection and wakeup feature
Two SPIs (18 Mbit/s) with four to 16 programmable bit frames, one with I²S interface multiplexed
CAN interface
USB 2.0 full-speed interface, able to run from internal 48 MHz oscillator and with BCD and LPM support
HDMI CEC, wakeup on header reception
Serial wire debug (SWD)
96-bit unique ID
All packages ECOPACK®2
