FK103M2 V1.0
STM32F103RCT6
Board
| Name | FK103M2 V1.0 |
| Part | FK103M2 |
| 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 | 32.768kHz |
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 | Holder (12.5mm / 12) |
Regulator
| Manufacturer | JCET Group Co., Ltd. |
| Part | CJA1117B (A1117B) |
| Package | SOT89 3 pins |
| Input | +4.6V to +15V |
| Output | +3.3V @ 1A |
| Datasheet | CJA1117B.pdf |
PCB
| Color | Black |
| Size (w x l) | 33mm x 52mm |
| 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
Outputs
Connectors
Devices
None
Inputs & outputs
Reset button
| Name | RST |
| Reference | - |
| Type | Button |
| Connected to | NRST |
| Mode | Active low |
BOOT0 solder bridge
| Name | BOOT0 |
| Reference | - |
| Type | Solder bridge |
| Connected to | BOOT0 |
| Mode | Active low |
BOOT1 solder bridge
| Name | BOOT1 |
| Reference | - |
| Type | Solder bridge |
| Connected to | PB2 |
| Mode | Active low |
User button
| Name | KEY |
| Reference | - |
| Type | Button |
| Connected to | PC2 |
| Mode | Active low |
Power LED
| Name | - |
| Reference | - |
| Type | LED |
| Connected to | +3.3V rail |
| Mode | N.A. |
User LED 1
| Name | - |
| Reference | - |
| Type | LED |
| Connected to | PC1 |
| Mode | Sink |
User LED 2
| Name | - |
| Reference | - |
| Type | LED |
| Connected to | PC0 |
| Mode | Sink |
Connectors & headers
Header 1 properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 14x2, male) |
Header 1 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | 3V3 | - | +3.3V rail |
| 2 | 5V | - | +5V rail |
| 3 | 3V3 | - | +3.3V rail |
| 4 | 5V | - | +5V rail |
| 5 | 3V3 | - | +3.3V rail |
| 6 | 5V | - | +5V rail |
| 7 | C13 | - | PC13 |
| 8 | PC0 | - | PC0 |
| 9 | PC1 | - | PC1 |
| 10 | PC2 | - | PC2 |
| 11 | B8 | - | PB8 |
| 12 | B9 | - | PB9 |
| 13 | B6 | - | PB6 |
| 14 | B7 | - | PB7 |
| 15 | B4 | - | PB4 |
| 16 | B5 | - | PB5 |
| 17 | PD2 | - | PD2 |
| 18 | PB3 | - | PB3 |
| 19 | C11 | - | PC11 |
| 20 | C12 | - | PC12 |
| 21 | A15 | - | PA15 |
| 22 | C10 | - | PC10 |
| 23 | PA8 | - | PA8 |
| 24 | PA11 | - | PA11 |
| 25 | A12 | - | PA12 |
| 26 | PA9 | - | PA9 |
| 27 | A10 | - | PA10 |
| 28 | PC9 | - | PC9 |
Header 2 properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 14x2, male) |
Header 2 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | GND | - | Ground plane |
| 2 | GND | - | Ground plane |
| 3 | GND | - | Ground plane |
| 4 | GND | - | Ground plane |
| 5 | PA2 | - | PA2 |
| 6 | GND | - | Ground plane |
| 7 | PA1 | - | PA1 |
| 8 | PA0 | - | PA0 |
| 9 | PC3 | - | PC3 |
| 10 | PA3 | - | PA3 |
| 11 | A5 | - | PA5 |
| 12 | A4 | - | PA4 |
| 13 | A7 | - | PA7 |
| 14 | A6 | - | PA6 |
| 15 | C5 | - | PC5 |
| 16 | C4 | - | PC4 |
| 17 | PB1 | - | PB1 |
| 18 | PB0 | - | PB0 |
| 19 | B10 | - | PB10 |
| 20 | PB2 | - | PB2 |
| 21 | PC8 | - | PC8 |
| 22 | B11 | - | PB11 |
| 23 | PC6 | - | PC6 |
| 24 | PC7 | - | PC7 |
| 25 | B14 | - | PB14 |
| 26 | B12 | - | PB12 |
| 27 | B15 | - | PB15 |
| 28 | B13 | - | PB13 |
USB connector properties
| Name | Unknown |
| Reference | None |
| Type | USB C |
USB connector pins
| # | Name | Function | Connected to |
|---|---|---|---|
| A1/B12 | - | GND | Ground plane |
| A4/B9 | - | VBUS | +5V rail |
| B8 | - | SBU2 | N.C. |
| A5 | - | CC1 | N.C. |
| B7 | - | D- | PA11 |
| A6 | - | D+ | PA12 |
| A7 | - | D- | PA11 |
| B6 | - | D+ | PA12 |
| A8 | - | SBU1 | N.C. |
| B5 | - | CC2 | N.C. |
| B4/A9 | - | VBUS | +5V rail |
| B1/A12 | - | GND | Ground plane |
SWD / Serial header properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 4x2, male) |
SWD / Serial header pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | 5V | - | +5V rail |
| 2 | 3V3 | - | +3.3V rail |
| 3 | GND | - | Ground plane |
| 4 | RST | - | NRST |
| 5 | DIO | - | PA13 |
| 6 | TX | - | PA9 |
| 7 | CLK | - | PA14 |
| 8 | RX | - | PA10 |