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Once you've designed your product on the DISCOVERY board and are ready to build a production PCB, the STM32F051R8 microcontroller costs $3.77 in single unit quantities from Digikey and Mouser. HDMI CEC interface, wakeup on header receptionįor only $8, this is an incredible value.Up to two SPIs (18 Mbit/s) with 4 to 16 programmable bit frame, 1 with I 2S interface multiplexed.Up to two USARTs supporting master synchronous SPI and modem control one with ISO7816 interface, LIN, IrDA capability auto baud rate detection and wakeup feature.Up to two I 2C interfaces one supporting Fast Mode Plus (1 Mbit/s) with 20 mA current sink, SMBus/PMBus, and wakeup from STOP.Calendar RTC with alarm and periodic wakeup from Stop/Standby.One 16-bit basic timer to drive the DAC.Two 16-bit timers, each with IC/OC and OCN, deadtime generation, emergency stop and modulator gate for IR control.One 16-bit timer, with 2 IC/OC, 1 OCN, deadtime generation and emergency stop.One 32-bit and one 16-bit timer, with up to 4 IC/OC, usable for IR control decoding.

One 16-bit 7-channel advanced-control timer for 6 channels PWM output, with deadtime generation and emergency stop.

Up to 18 capacitive sensing channels supporting touchkey, linear and rotary touch sensors.

Two fast low-power analog comparators with programmable input and output.

Separate analog supply from 2.4 up to 3.6 V.

1 x 12-bit, 1.0 us ADC (up to 16 channels).

Up to 36 I/Os with 5 V tolerant capability.

All mappable on external interrupt vectors.

32 kHz oscillator for RTC with calibration.

V BAT supply for RTC and backup registers.

Low power Sleep, Stop, and Standby modes.

8 Kbytes of SRAM with HW parity checking.

Core: ARM 32-bit Cortex™-M0 CPU,frequency up to 48 MHz.

As it ships, the microcontroller runs at 48MHz off an internal RC oscillator, but there are unpopulated pads on the PCB where you can add your own crystals for both the high speed clock and a 32.768 kHz crystal for the real-time clock/calendar.Īllow me to plagiarize the features list for the STM32F051R8 processor from ST's website: The header pins are single-row pins, so the board can be put into a breadboard.

All of the microcontroller's I/O pins are brought out to header pins on the dev board. The board can be powered via USB and contains two user LEDs and one user button. Unlike dev boards from other manufacturers, the programmer is designed so that it can be used to program the onboard microcontroller, or it can be used as a standalone programmer. For only $8 ( Digikey, Mouser), you get a dev board with a STM32F051R8T6 microcontroller and an onboard ST-LINK programmer/debugger. The STM32F0DISCOVERY board is a great platform for learning ARM microcontroller programming.