STM32F103C8T6 - Purple Pill

Purple Pill

Overview

Board Name Purple Pill
Brand CJMCU
Origin AliExpress, China
Microcontroller Part STM32F103C8T6
Package LQFP48
Core Cortex-M3
FLASH 64KB
SRAM 20KB
Max. Clock Speed 72MHz
Crystals HSE (High Speed External) 8MHz
LSE (Low Speed External) None
Power Sources Any +3.3V pin (+3.3V)
Any +5V pin (+5V)
USB connector (+5V)
Regulator manufacturer Micrel / Microchip
Regulator part number MIC5219 (LG33)
Regulator package SOT-23-5
Output +3.3V @ 500mA (peak)
Battery holder No
Connectivity Headers 2x 1x15 male dupont (2.54mm)
Specific None
Debug None
USB Mini
I/O LEDs Power LED (+3.3V)
User LED (PB11, source)
User LED (PB12, source)
Buttons, switches and jumpers None
Other devices None
PCB Colour Purple
Size 45mm x 25mm
Mounting Breadboard
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

Purple Pill

Purple Pill Top view

Purple Pill Bottom view

Header 1

Pin Connected to
3.3 +3.3V rail
DIO PA13
DLK PA14
RST NRST
GND Ground plane
MOS PA7
MIO PA6
CLK PA5
CS PA4
3.3 +3.3V rail
GND Ground plane
PA0 PA0
PA1 PA1
PA2 PA2
PA3 PA3

Header 2

Pin Connected to
PB3 PB3
PB2 PB2
PB1 PB1
PB0 PB0
3.3 +3.3V rail
GND Ground plane
RX PA10
TX PA9
3.3 +3.3V rail
+5V +5V rail
GND Ground plane
SDA PB6
SCL PB7
+5V +5V rail
GND Ground plane

USB

Pin Connected to
VCC +5V rail
D- PA11
D+ PA12
ID N.C.
GND Ground plane