WeAct Black Pill V3.0
STM32F401CEU6
Board
| Name | WeAct Black Pill V3.0 |
| Part | Unknown |
| Brand | WeAct Studio |
| Origin | China |
Microcontroller
| Part | STM32F401CEU6 |
| Manufacturer | ST-Microelectronics |
| Core | Arm Cortex-M4 |
| Max. Clock Speed | 84MHz |
| Package | UFQFPN 48 pins |
Internal memories
| FLASH | 512KiB |
| SRAM | 96KiB |
Oscillators
| HSI | 16MHz |
| LSI | 32kHz |
| HSE | 25MHz |
| 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 | Diodes Incorporated |
| Part | AP7343 (6T) |
| Package | X2-DFN1010-4 4 pins |
| Input | +3.52V to +5.25V |
| Output | +3.3V @ 300mA |
| Datasheet | AP7343.pdf |
PCB
| Color | Black |
| Size (w x l) | 20.78mm x 52.81mm |
| Mounting | Breadboard |
Remarks
- Note: The board shown in the images is the variant with an STM32F411CEU6 microcontroller. The PCB is identical.
Pictures
Inputs
Connectors
Devices
Inputs & outputs
Reset button
| Name | NRST |
| Reference | - |
| Type | Button |
| Connected to | NRST |
| Mode | Active low |
BOOT0 button
| Name | BOOT0 |
| Reference | - |
| Type | Button |
| Connected to | BOOT0 |
| Mode | Active high |
User button
| Name | KEY |
| Reference | - |
| Type | Button |
| Connected to | PA0 |
| Mode | Active low |
Power LED
| Name | PWR |
| Reference | - |
| Type | LED |
| Connected to | +3.3V rail |
| Mode | N.A. |
User LED
| Name | PC13 |
| Reference | - |
| Type | LED |
| Connected to | PC13 |
| Mode | Sink |
Connectors & headers
Header 1 properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 20x1, male) |
Header 1 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | 5V | - | +5V rail |
| 2 | G | - | Ground plane |
| 3 | 3.3 | - | +3.3V rail |
| 4 | B10 | - | PB10 |
| 5 | B2 | - | PB2 |
| 6 | B1 | - | PB1 |
| 7 | B0 | - | PB0 |
| 8 | A7 | - | PA7 |
| 9 | A6 | - | PA6 |
| 10 | A5 | - | PA5 |
| 11 | A4 | - | PA4 |
| 12 | A3 | - | PA3 |
| 13 | A2 | - | PA2 |
| 14 | A1 | - | PA1 |
| 15 | A0 | - | PA0 |
| 16 | R | - | NRST |
| 17 | C15 | - | PC15 |
| 18 | C14 | - | PC14 |
| 19 | C13 | - | PC13 |
| 20 | VB | - | VBAT |
Header 2 properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 20x1, male) |
Header 2 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | B12 | - | PB12 |
| 2 | B13 | - | PB13 |
| 3 | B14 | - | PB14 |
| 4 | B15 | - | PB15 |
| 5 | A8 | - | PA8 |
| 6 | A9 | - | PA9 |
| 7 | A10 | - | PA10 |
| 8 | A11 | - | PA11 |
| 9 | A12 | - | PA12 |
| 10 | A15 | - | PA15 |
| 11 | B3 | - | PB3 |
| 12 | B4 | - | PB4 |
| 13 | B5 | - | PB5 |
| 14 | B6 | - | PB6 |
| 15 | B7 | - | PB7 |
| 16 | B8 | - | PB8 |
| 17 | B9 | - | PB9 |
| 18 | 5V | - | +5V rail |
| 19 | G | - | Ground plane |
| 20 | 3.3 | - | +3.3V rail |
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 | Ground plane via 5.1kΩ (R8) |
| A5 | - | CC1 | Ground plane via 5.1kΩ (R8) |
| B7 | - | D- | PA11 via 10Ω (R9) |
| A6 | - | D+ | PA12 via 10Ω (R7) |
| A7 | - | D- | PA11 via 10Ω (R9) |
| B6 | - | D+ | PA12 via 10Ω (R7) |
| A8 | - | SBU1 | Ground plane via 5.1kΩ (R8) |
| B5 | - | CC2 | Ground plane via 5.1kΩ (R8) |
| B4/A9 | - | VBUS | +5V rail |
| B1/A12 | - | GND | Ground plane |
SWD header properties
| Name | SW |
| Reference | None |
| Type | pin header (2.54mm, 4x1, male) |
SWD header pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | 3.3V | VCC | +3.3V rail |
| 2 | SWDIO | SWDIO | PA13 |
| 3 | SWCLK | SWCLK | PA14 |
| 4 | GND | GND | Ground plane |
Devices
Generic EEPROM properties footprint
| Name | Unknown |
| Reference | U3 |
| Manufacturer | Unknown |
| Part | Generic EEPROM |
| Marking | Unknown |
| Datasheet | Unavailable |
| Package | SOP 8 pins |
| Description | Generic I2C EEPROM |
Generic EEPROM pins footprint
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | /CS | PA4 |
| 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 |