Ugly Board
STM32F103C8T6
Board
| Name | Ugly Board |
| Part | STM32F103C8 |
| 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 | 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) | 42mm x 60mm |
| 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.
- Trivia: This board got its name from the STM32duino Wiki pages, which are now offline.
Pictures
Resources
Inputs
Connectors
Devices
None
Inputs & outputs
Reset button
| Name | REST |
| Reference | - |
| Type | Button |
| Connected to | NRST |
| Mode | Active low |
BOOT0 jumper
| Name | - |
| Reference | - |
| Type | 1-way jumper |
| Connected to | BOOT0 |
| Mode | Active high |
- Note: This jumper is part of Header 1.
User button
| Name | KEY |
| Reference | - |
| Type | Button |
| Connected to | PC13 |
| Mode | Active low |
Power LED
| Name | - |
| Reference | D2 |
| Type | LED |
| Connected to | +3.3V rail |
| Mode | N.A. |
User LED
| Name | - |
| Reference | D1 |
| Type | LED |
| Connected to | PE8 |
| Mode | Sink |
Connectors & headers
Header 1 properties
| Name | Unknown |
| Reference | J2 |
| Type | Pin header (2.54mm, 22x1, male) |
Header 1 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | B12 | - | PB12 |
| 2 | B13 | - | PB13 |
| 3 | B14 | - | PB14 |
| 4 | PB15 | - | PB15 |
| 5 | PA8 | - | PA8 |
| 6 | PA9 | - | PA9 |
| 7 | PA10 | - | PA10 |
| 8 | PA11 | - | PA11 |
| 9 | PA12 | - | PA12 |
| 10 | PA13 | - | PA13 |
| 11 | PA14 | - | PA14 |
| 12 | PA15 | - | PA15 |
| 13 | PB3 | - | PB3 |
| 14 | PB4 | - | PB4 |
| 15 | PB5 | - | PB5 |
| 16 | PB6 | - | PB6 |
| 17 | PB7 | - | PB7 |
| 18 | PB8 | - | PB8 |
| 19 | PB9 | - | PB9 |
| 20 | 3.3V | - | +3.3V rail |
| 21 | 3.3V | - | +3.3V rail |
| 22 | BOOT0 | - | BOOT0 |
Header 2 properties
| Name | Unknown |
| Reference | J8 |
| Type | Pin header (2.54mm, 20x1, male) |
Header 2 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | 3.3V | - | +3.3V rail |
| 2 | PC13 | - | PC13 |
| 3 | PA0 | - | PA0 |
| 4 | PA1 | - | PA1 |
| 5 | PA2 | - | PA2 |
| 6 | PA3 | - | PA3 |
| 7 | PA4 | - | PA4 |
| 8 | PA5 | - | PA5 |
| 9 | PA6 | - | PA6 |
| 10 | PA7 | - | PA7 |
| 11 | PB0 | - | PB0 |
| 12 | PB1 | - | PB1 |
| 13 | PB2 | - | PB2 |
| 14 | PB10 | - | PB10 |
| 15 | PB11 | - | PB11 |
| 16 | 3.3V | - | +3.3V rail |
| 17 | 3.3V | - | +3.3V rail |
| 18 | 3.3V | - | +3.3V rail |
| 19 | GND | - | Ground plane |
| 20 | GND | - | Ground plane |
USB connector properties
| Name | Unknown |
| Reference | U4 |
| 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 |
JTAG header properties
| Name | Unknown |
| Reference | U3 |
| 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 |
OLED header properties
| Name | OLED PORT |
| Reference | J1 |
| Type | pin header (2.54mm, 8x1, female) |
OLED header pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | GND | - | Ground plane |
| 2 | VCC | - | +3.3V rail |
| 3 | PA5 | - | PA5 |
| 4 | PA7 | - | PA7 |
| 5 | PB0 | - | PB0 |
| 6 | PB1 | - | PB1 |
| 7 | PA4 | - | PA4 |
| 8 | PB10 | - | PB10 |