STM32C0xx Series

Not long ago, ST introduce their new low cost series STM32C0xx. ST advertise the series as a MCU to replace traditional old fashioned 8-bit MCUs at a competitive price point.

Series overview

Block diagram

Comparing STM32C071C8 with STM32F103C8

One big question is - WHY! The STM32C071 is not cheaper than the STM32F103, in fact in almost every measurable way it is lower spec'ed.

	STM32F103	STM32C071
Price (at the time of writing, single unit at LCSC)	$1.92	$2.05
Core	M3	M0+
Max Core Clock	72 MHz	48 MHz
Flash	64 kB	64 kB
RAM	20 kB	24 kB
GPIO	37, many 5V tolerant	45, all 5V tolerant
Timers	4 16 bits, 1 SysTick (24bits)	5 16 bits, 1 32 bits, 1 SysTick (24bits)
Clock PLL	Yes	No
Trace Macrocell	Yes	No
Peripheral Buses	2	1
UARTs	3	2
SPI	2	2*
I2C	2	2
DMA	7	5
ADC	2, 12 bits, 10 ch, 1 Msps	1, 12 bits, 17 ch, 2.5 Msps
CAN bus	Yes	No
USB	HAL	USBX
Ext Crystal for USB	Required	Not required
Deep Sleep	~1.4µA	~20nA

Note: * Page 10 in datasheet says "+2 extra through USARTs"

Miscellaneous links

• STM32C071C8 on JLCPCB
• STM32F103C8 on JLCPCB
• STM32C071 Datasheet
• STM32C0 series Reference Manual