STM32F103RCT6 - iShare

iShare

Overview

Board Name iShare
Brand iShare
Origin AliExpress, China
Microcontroller Part STM32F103RCT6
Package LQFP64
Core Cortex-M3
FLASH 256KB
SRAM 48KB
Max. Clock Speed 72MHz
Crystals HSE (High Speed External) 8MHz
LSE (Low Speed External) 32.768kHz
Power Sources Any +3.3V pin (+3.3V)
Any +5V pin (+5V)
USB connector (+5V)
Regulator manufacturer Advanced Monolithic Systems Inc.
Regulator part number AMS1117
Regulator package SOT223
Output +3.3V @ 1000mA
Battery holder No
Connectivity Headers 1x 2x17 female dupont (2.54mm)
1x 2x14 male dupont (2.54mm)
Specific SD-card connector
Debug JTAG (20-pin IDC))
USB Micro
I/O LEDs Power LED (PWR, +3.3V)
User LED (DSO, PA8, sink)
Buttons, switches and jumpers Reset button (RESET, NRST, active low)
User button (KEY0, PC5, active low)
2-way jumper (BOOT0)
2-way jumper (BOOT1)
Switch (Enable power from USB)
Other devices ATMH442 (ATMEL AT24Cxx clone/counterfeit)
Winbond W25Q64FVSI6 (64Kb FLASH)
PCB Colour Blue
Size 75mm x 50mm
Mounting 4x mounting hole (M3)
Remarks
  • Note: This board is meant for developing LCD based projects, hence the female connector.
  • 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

iShare

iShare Top view

iShare Bottom view

Header 1

Pin Connected to
C13 PC13
PC0 PC0
PC1 PC1
PA2 PA2
PC2 PC2
PC3 PC3
GND Ground plane
NC N.C.
VCC +3.3V rail
GND Ground plane
C10 PC10
VCC +3.3V rail
B15 PC15
PA3 PA3
B13 PB13
B14 PB14
B11 PB11
B12 PB12
PB9 PB9
B10 PB10
PB7 PB7
PB8 PB8
PB5 PB5
PB6 PB6
PB3 PB3
PB4 PB4
PB1 PB1
PB2 PB2
PC4 PC4
PB0 PB0
PC7 PC7
PC6 PC6
PC9 PC9
PC8 PC8

Header 2

Pin Connected to
5V +5V rail
GND Ground plane
5V +5V rail
GND Ground plane
5V +5V rail
GND Ground plane
3V3 +3.3V rail
GND Ground plane
3V3 +3.3V rail
GND Ground plane
3V3 +3.3V rail
GND Ground plane
3V3 +3.3V rail
3V3 +3.3V rail
BT0 BOOT0
BT1 BOOT1
GND Ground plane
GND Ground plane
PC5 PC5
PD2 PD2
PA1 PA1
PA0 PA0
C15 PC15
PC14 PC14
A12 PA12
PA11 PA11
PA9 PA9
PA10 PA10

USB

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

JTAG

Pin Connected to JTAG SWD
1 +3.3V rail VCC -
2 +3.3V rail VCC -
3 PB4 TRST -
4 Ground plane GND -
5 PA15 TDI -
6 Ground plane GND -
7 PA13 TMS SWDIO
8 Ground plane GND -
9 PA14 TCLK SWCLK
10 Ground plane GND -
11 N.C. RTCK -
12 Ground plane GND -
13 PB3 TDO SWO
14 Ground plane GND -
15 NRST RESET -
16 Ground plane GND -
17 N.C. N.C. -
18 Ground plane GND -
19 N.C. N.C. -
20 Ground plane GND -

SD-card connector

Pin Connected to
RSV N.C.
CS PC11
DI PD2
VCC +3.3V rail
SCLK PC12
GND Ground plane
DO PC8
RSV N.C.
CD PC7
BODY N.C.

IC - Winbond W25Q64FVSI6 (64Mb FLASH)

Pin Connected to
/CS +3.3V rail via 10kΩ resistor
DO PA6
IO2 +3.3V rail
GND Ground plane
DI PA7
CLK PA5
IO3 +3.3V rail
VCC +3.3V rail

IC - ATMH442 (ATMEL AT24Cxx clone/counterfeit)

Pin Connected to
A0 Ground plane
A1 Ground plane
A2 Ground plane
GND Ground plane
SDA PB7
SCL PB6
WP Ground plane
VCC +3.3V rail