Blue Pill

STM32F051C8T6


Board

NameBlue Pill
PartUnknown
BrandUnknown
OriginChina

Microcontroller

PartSTM32F051C8T6
ManufacturerST-Microelectronics
CoreArm Cortex-M0
Max. Clock Speed48MHz
PackageLQFP 48 pins

Internal memories

FLASH64KiB
SRAM8KiB

Oscillators

HSI8MHz
LSI40kHz
HSE8MHz
LSE32.768kHz

Power

Sources
Any +3.3V pin (+3.3V)
Any +5V pin (+5V)
USB connector (+5V)
VDDA pinNo
VSSA pinNo
VREF- pinNo
VREF+ pinNo
Backup batteryPin

Regulator

ManufacturerTorex Semiconductor LTD.
PartXC6204 (4A2D)
PackageSOT89-3 3 pins
Input+3.6V to +10V
Output+3.3V @ 300mA
DatasheetXC6204-XC6205.pdf

PCB

ColorBlue
Size (w x l)23mm x 53mm
MountingBreadboard

Remarks

  • Warning: The +5V pins on this board are directly connected to the +5V pin of the USB connector. There is no protection in place. Do not power this board through USB and an external power supply at the same time.

Pictures

Blue Pill: Perspective view
Blue Pill: Perspective view
Blue Pill: Top view
Blue Pill: Top view
Blue Pill: Bottom view
Blue Pill: Bottom view

Inputs & outputs


Reset button

Name REST
Reference -
Type Button
Connected to NRST
Mode Active low

BOOT0 jumper

Name BOOT0
Reference -
Type 1-way jumper
Connected to BOOT0
Mode Active low

Power LED

Name PWR
Reference -
Type LED
Connected to +3.3V rail
Mode N.A.

User LED

Name PC13
Reference -
Type LED
Connected to PC13
Mode Sink

Connectors & headers


Header 1 properties

Name Unknown
Reference None
Type Pin header (2.54mm, 20x1, male)

Header 1 pins

# Name Function Connected to
1 VB - VBAT
2 C13 - PC13
3 C14 - PC14
4 C15 - PC15
5 A0 - PA0
6 A1 - PA1
7 A2 - PA2
8 A3 - PA3
9 A4 - PA4
10 A5 - PA5
11 A6 - PA6
12 A7 - PA7
13 B0 - PB0
14 B1 - PB1
15 B10 - PB10
16 B11 - PB11
17 B2 - PB2
18 3.3 - +3.3V rail
19 G - Ground plane
20 G - Ground plane

Header 2 properties

Name Unknown
Reference None
Type Pin header (2.54mm, 20x1, male)

Header 2 pins

# Name Function Connected to
1 3.3 - +3.3V rail
2 G - Ground plane
3 5V - +5V rail
4 B9 - PB9
5 B8 - PB8
6 B7 - PB7
7 B6 - PB6
8 B5 - PB5
9 B4 - PB4
10 B3 - PB3
11 A15 - PA15
12 A12 - PA12
13 A11 - PA11
14 A10 - PA10
15 A9 - PA9
16 A8 - PA8
17 B15 - PB15
18 B14 - PB14
19 B13 - PB13
20 B12 - PB12

USB connector properties

Name Unknown
Reference None
Type USB Mini

USB connector pins

# Name Function Connected to
1 - VCC +5V rail
2 - D- N.C.
3 - D+ N.C.
4 - ID N.C.
5 - GND Ground plane

SWD header properties

Name Unknown
Reference None
Type Pin header (2.54mm, 4x1, male)

SWD header pins

# Name Function Connected to
1 3.3V VCC +3.3V rail
2 DIO SWDIO PA13
3 CLK SWCLK PA14
4 GND GND Ground plane

Devices


Generic EEPROM properties footprint

Name Unknown
Reference U3
Manufacturer Unknown
Part Generic EEPROM
Marking Unknown
Datasheet Unavailable
Package SOP 8 pins
Description Generic I2C EEPROM

Generic EEPROM pins footprint

# Name Function Connected to
1 - A0 Ground plane
2 - A1 Ground plane
3 - A2 Ground plane
4 - GND Ground plane
5 - SDA PF7
6 - SCL PF6
7 - WP Ground plane
8 - VCC +3.3V rail