Strange Thing
STM32F103C8T6
Board
| Name | Strange Thing |
| Part | Unknown |
| Brand | Unknown |
| Origin | China |
Microcontroller
| Part | STM32F103C8T6 |
| Manufacturer | ST-Microelectronics |
| Core | Arm Cortex-M3 |
| Max. Clock Speed | 72MHz |
| Package | LQFP 48 pins |
Internal memories
| FLASH | 64KiB |
| SRAM | 20KiB |
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 | Pin |
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 | Black |
| Size (w x l) | 34mm x 33mm |
| Mounting | None |
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
Inputs
Connectors
Devices
None
Inputs & outputs
Reset button
| Name | NRST |
| Reference | - |
| Type | Button |
| Connected to | NRST |
| Mode | Active low |
BOOT0 jumper
| Name | - |
| Reference | - |
| Type | 1-way jumper |
| Connected to | BOOT0 |
| Mode | Active low |
- Note: This jumper is part of Header 4.
BOOT1 jumper
| Name | - |
| Reference | - |
| Type | 1-way jumper |
| Connected to | PB2 |
| Mode | Active low |
- Note: This jumper is part of Header 4.
Power LED
| Name | - |
| Reference | - |
| Type | LED |
| Connected to | +3.3V rail |
| Mode | N.A. |
User LED
| Name | - |
| Reference | - |
| Type | LED |
| Connected to | PB0 |
| Mode | Sink |
Connectors & headers
Header 1 properties
| Name | Unknown |
| Reference | None |
| Type | Pin header (2.54mm, 8x2, male) |
Header 1 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | A0 | - | PA0 |
| 2 | A1 | - | PA1 |
| 3 | A2 | - | PA2 |
| 4 | A3 | - | PA3 |
| 5 | A4 | - | PA4 |
| 6 | A5 | - | PA5 |
| 7 | A6 | - | PA6 |
| 8 | A7 | - | PA7 |
| 9 | A8 | - | PA8 |
| 10 | A9 | - | PA9 |
| 11 | A10 | - | PA10 |
| 12 | A11 | - | PA11 |
| 13 | A12 | - | PA12 |
| 14 | A13 | - | PA13 |
| 15 | A14 | - | PA14 |
| 16 | A15 | - | PA15 |
Header 2 properties
| Name | Unknown |
| Reference | None |
| Type | Pin header (2.54mm, 8x2, male) |
Header 2 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | B0 | - | PB0 |
| 2 | B1 | - | PB1 |
| 3 | B2 | - | PB2 |
| 4 | B3 | - | PB3 |
| 5 | B4 | - | PB4 |
| 6 | B5 | - | PB5 |
| 7 | B6 | - | PB6 |
| 8 | B7 | - | PB7 |
| 9 | B8 | - | PB8 |
| 10 | B9 | - | PB9 |
| 11 | B10 | - | PB10 |
| 12 | B11 | - | PB11 |
| 13 | B12 | - | PB12 |
| 14 | B13 | - | PB13 |
| 15 | B14 | - | PB14 |
| 16 | B15 | - | PB15 |
Header 3 properties
| Name | Unknown |
| Reference | None |
| Type | Pin header (2.54mm, 13x1, male) |
Header 3 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | 3.3 | - | +3.3V rail |
| 2 | 5V | - | +5V rail |
| 3 | GND | - | Ground plane |
| 4 | GND | - | Ground plane |
| 5 | C13 | - | PC13 |
| 6 | C14 | - | PC14 |
| 7 | C15 | - | PC15 |
| 8 | RST | - | NRST |
| 9 | BAT | - | VBAT |
| 10 | 3.3 | - | +3.3V rail |
| 11 | 5V | - | +5V rail |
| 12 | GND | - | Ground plane |
| 13 | GND | - | Ground plane |
Header 4: SWD & Serial properties
| Name | Unknown |
| Reference | None |
| Type | Pin header (2.54mm, 6x2, male) |
Header 4: SWD & Serial pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | 5V | - | +5V rail |
| 2 | 3.3 | - | +3.3V rail |
| 3 | RX | - | PA10 |
| 4 | DIO | SWDIO | PA13 |
| 5 | TX | - | PA9 |
| 6 | CLK | SWCLK | PA14 |
| 7 | GND | - | Ground plane |
| 8 | GND | - | Ground plane |
| 9 | BT0 | - | BOOT0, pulled up by 10kΩ resistor |
| 10 | - | - | Ground plane |
| 11 | BT1 | - | BOOT1, pulled up by 10kΩ resistor |
| 12 | - | - | Ground plane |
USB connector properties
| Name | Unknown |
| Reference | None |
| Type | USB Micro |
USB connector pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | VCC | +5V rail |
| 2 | - | D- | PA11 |
| 3 | - | D+ | PA12 |
| 4 | - | ID | N.C. |
| 5 | - | GND | Ground plane |