iShare
STM32F103RCT6
Board
| Name | iShare |
| Part | Unknown |
| Brand | Unknown |
| Origin | China |
Microcontroller
| Part | STM32F103RCT6 |
| Manufacturer | ST-Microelectronics |
| Core | Arm Cortex-M3 |
| Max. Clock Speed | 72MHz |
| Package | UFQFPN 64 pins |
Internal memories
| FLASH | 256KiB |
| SRAM | 48KiB |
Oscillators
| HSI | 8MHz |
| LSI | 40kHz |
| HSE | 8MHz |
| LSE | None |
Power
| Sources | Any +3.3V pin (+3.3V) Any +5V pin (+5V) USB connector (+5V) |
| VDDA pin | No |
| VSSA pin | No |
| VREF- pin | No |
| VREF+ pin | No |
| Backup battery | None |
Regulator
| Manufacturer | Advanced Monolithic Systems Inc. |
| Part | AMS1117 (AMS1117) |
| Package | SOT223 3 pins |
| Input | +4.6V to +15V |
| Output | +3.3V @ 1A |
| Datasheet | AMS1117.pdf |
PCB
| Color | Blue |
| Size (w x l) | 50mm x 75mm |
| Mounting | 4x mounting hole (M3) |
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
Resources
Connectors
Inputs & outputs
Reset button
| Name | RESET |
| Reference | - |
| Type | Button |
| Connected to | NRST |
| Mode | Active low |
User button
| Name | KEY0 |
| Reference | - |
| Type | Button |
| Connected to | PC5 |
| Mode | Active low |
BOOT0 jumper
| Name | - |
| Reference | - |
| Type | 2-way jumper |
| Connected to | BOOT0 |
| Mode | N.A. |
- Note: This jumper is part of Header 2.
BOOT1 jumper
| Name | - |
| Reference | - |
| Type | 2-way jumper |
| Connected to | PB2 |
| Mode | N.A. |
- Note: This jumper is part of Header 2.
Power source switch
| Name | - |
| Reference | - |
| Type | Switch |
| Connected to | +5V USB |
| Mode | N.A. |
- Note: This switch connects/disconnects the +5V power pin from the USB to the +5V rail.
Power LED
| Name | PWR |
| Reference | - |
| Type | LED |
| Connected to | +3.3V rail |
| Mode | N.A. |
User LED
| Name | DSO |
| Reference | - |
| Type | LED |
| Connected to | PA8 |
| Mode | Sink |
Connectors & headers
Header 1 properties
| Name | Unknown |
| Reference | None |
| Type | Pin header (2.54mm, 17x2, female) |
Header 1 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | PC9 | - | PC9 |
| 2 | PC8 | - | PC8 |
| 3 | PC7 | - | PC7 |
| 4 | PC6 | - | PC6 |
| 5 | PC4 | - | PC4 |
| 6 | PB0 | - | PB0 |
| 7 | PB1 | - | PB1 |
| 8 | PB2 | - | PB2 |
| 9 | PB3 | - | PB3 |
| 10 | PB4 | - | PB4 |
| 11 | PB5 | - | PB5 |
| 12 | PB6 | - | PB6 |
| 13 | PB7 | - | PB7 |
| 14 | PB8 | - | PB8 |
| 15 | PB9 | - | PB9 |
| 16 | B10 | - | PB10 |
| 17 | B11 | - | PB11 |
| 18 | B12 | - | PB12 |
| 19 | B13 | - | PB13 |
| 20 | B14 | - | PB14 |
| 21 | B15 | - | PB15 |
| 22 | PA3 | - | PA3 |
| 23 | C10 | - | PC10 |
| 24 | VCC | - | +3.3V rail |
| 25 | VCC | - | +3.3V rail |
| 26 | GND | - | Ground plane |
| 27 | GND | - | Ground plane |
| 28 | NC | - | N.C. |
| 29 | PC2 | - | PC2 |
| 30 | PC3 | - | PC3 |
| 31 | PC1 | - | PC1 |
| 32 | PA2 | - | PA2 |
| 33 | C13 | - | PC13 |
| 34 | PC0 | - | PC0 |
Header 2 properties
| Name | Unknown |
| Reference | None |
| Type | Pin header (2.54mm, 14x2, male) |
Header 2 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | PA9 | - | PA9 |
| 2 | PA10 | - | PA10 |
| 3 | A12 | - | PA12 |
| 4 | PA11 | - | PA11 |
| 5 | C15 | - | PC15 |
| 6 | PC14 | - | PC14 |
| 7 | PA1 | - | PA1 |
| 8 | PA0 | - | PA0 |
| 9 | PC5 | - | PC5 |
| 10 | PD2 | - | PD2 |
| 11 | GND | - | Ground plane |
| 12 | GND | - | Ground plane |
| 13 | BT0 | - | BOOT0 |
| 14 | BT1 | - | PB2 |
| 15 | 3V3 | - | +3.3V rail |
| 16 | 3V3 | - | +3.3V rail |
| 17 | 3V3 | - | +3.3V rail |
| 18 | GND | - | Ground plane |
| 19 | 3V3 | - | +3.3V rail |
| 20 | GND | - | Ground plane |
| 21 | 3V3 | - | +3.3V rail |
| 22 | GND | - | Ground plane |
| 23 | 5V | - | +5V rail |
| 24 | GND | - | Ground plane |
| 25 | 5V | - | +5V rail |
| 26 | GND | - | Ground plane |
| 27 | 5V | - | +5V rail |
| 28 | GND | - | Ground plane |
USB connector properties
| Name | Unknown |
| Reference | None |
| Type | USB Micro |
USB connector pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | VCC | +5V rail via power switch |
| 2 | - | D- | PA11 |
| 3 | - | D+ | PA12 |
| 4 | - | ID | N.C. |
| 5 | - | GND | Ground plane |
JTAG header properties
| Name | JTAG |
| Reference | None |
| Type | IDC (2.54mm, 10x2, male) |
JTAG header pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | VCC | +3.3V rail |
| 2 | - | VCC | +3.3V rail |
| 3 | - | TRST | PB4 |
| 4 | - | GND | Ground plane |
| 5 | - | TDI | PA15 |
| 6 | - | GND | Ground plane |
| 7 | - | TMS / SWDIO | PA13 |
| 8 | - | GND | Ground plane |
| 9 | - | TCLK / SWCLK | PA14 |
| 10 | - | GND | Ground plane |
| 11 | - | RTCK | N.C. |
| 12 | - | GND | Ground plane |
| 13 | - | TDO / SWO | PB3 |
| 14 | - | GND | Ground plane |
| 15 | - | RESET | NRST |
| 16 | - | GND | Ground plane |
| 17 | - | N.C. | N.C. |
| 18 | - | GND | Ground plane |
| 19 | - | N.C. | N.C. |
| 20 | - | GND | Ground plane |
SD-card connector properties
| Name | Unknown |
| Reference | None |
| Type | microSD |
SD-card connector pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | DAT2 | N.C. |
| 2 | - | CD/DAT3 | PC11 |
| 3 | - | CMD | PD2 |
| 4 | - | VDD | +3.3V rail |
| 5 | - | CLK | PC12 |
| 6 | - | VSS | Ground plane |
| 7 | - | DAT0 | PC8 |
| 8 | - | DAT1 | N.C. |
| 9 | - | CD | PC7 |
| 10 | - | Body | N.C. |
Devices
W25Q64FV properties
| Name | FLASH |
| Reference | Unknown |
| Manufacturer | Winbond Electronics Corporation |
| Part | W25Q64FV |
| Marking | W25Q64FVSI6 |
| Datasheet | W25Q64FV.pdf |
| Package | SOIC 8 pins |
| Description | 8MiB Dual/Quad SPI FLASH |
W25Q64FV pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | /CS | +3.3V rail via 10kΩ resistor |
| 2 | - | DO | PA6 |
| 3 | - | /WP | +3.3V rail |
| 4 | - | GND | Ground plane |
| 5 | - | DI | PA7 |
| 6 | - | CLK | PA5 |
| 7 | - | /HOLD | +3.3V rail |
| 8 | - | VCC | +3.3V rail |
AT24C02C properties
| Name | Unknown |
| Reference | U3 |
| Manufacturer | Microchip Technology Inc. |
| Part | AT24C02C |
| Marking | 02C |
| Datasheet | AT24C01C-02C.pdf |
| Package | SOIC 8 pins |
| Description | 256B I2C EEPROM |
AT24C02C pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | A0 | Ground plane |
| 2 | - | A1 | Ground plane |
| 3 | - | A2 | Ground plane |
| 4 | - | GND | Ground plane |
| 5 | - | SDA | PB7 |
| 6 | - | SCL | PB6 |
| 7 | - | WP | Ground plane |
| 8 | - | VCC | +3.3V rail |