Datasheet

Description STM32F051x
10/105 Doc ID 022265 Rev 3
Table 2. STM32F051x family device features and peripheral counts
Peripheral STM32F051Kx STM32F051Cx STM32F051Rx
Flash (Kbytes) 16 32 64 16 32 64 16 32 64
SRAM (Kbytes) 484848
Timers
Advanced
control
1 (16-bit)
General
purpose
5 (16-bit)
1 (32-bit)
Basic 1 (16-bit)
Comm.
interfaces
SPI [I2S]
(1)
1[1]
(2)
1[1]
(2)
2[1] 1[1]
(2)
2[1]
I
2
C1
(3)
1
(3)
21
(3)
2
USART 1
(4)
21
(4)
21
(4)
2
CEC 1
12-bit synchronized
ADC
(number of channels)
1
(10 ext. + 3 int.)
1
(16 ext. + 3 int.)
GPIOs
25 (on LQFP32)
27 (on UFQFPN32)
39 55
Capacitive sensing
channels
13 (on LQFP32)
14 (on UFQFPN32)
17 18
12-bit DAC
(number of channels)
1
(1)
Analog comparator 2
Max. CPU frequency 48 MHz
Operating voltage 2.0 to 3.6 V
Operating temperature
Ambient operating temperature: -40 °C to 85 °C / -40 °C to 105 °C
Junction temperature: -40 °C to 125 °C
Packages
LQFP32
UFQFPN32
LQFP48 LQFP64
1. The SPI1 interface can be used either in SPI mode or in I2S audio mode.
2. SPI2 is not present
3. I2C2 is not present
4. USART2 is not present