Maple Mini Clone
STM32F103C8T6
Board
| Name | Maple Mini Clone |
| Part | BTE14-07 |
| 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 | 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 | 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 | Blue |
| Size (w x l) | 18mm x 51mm |
| Mounting | Breadboard |
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.
- Note: The user button is also connected the the BOOT0 pin. This means that this button should be pressed when flashing the microcontroller.
- Trivia: This board is a clone of the official Maple Mini originally made by Leaflabs. The originial Maple Mini was designed to be used with the standard Arduino IDE. The official Maple products are no longer supported. The software has since been forked and is maintained under the STM32duino flag, supporting more boards than the original Maple project.
Pictures
Resources
Inputs
Outputs
Connectors
Devices
None
Inputs & outputs
Reset button
| Name | reset |
| Reference | - |
| Type | Button |
| Connected to | NRST |
| Mode | Active low |
User button
| Name | but=32 |
| Reference | - |
| Type | Button |
| Connected to | BOOT0 and PB8 |
| Mode | Active high |
User LED
| Name | d1=33 |
| Reference | - |
| Type | LED |
| Connected to | PB1 |
| Mode | Source |
Connectors & headers
Header 1 properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 20x1, male) |
Header 1 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | Vcc | - | +3.3V rail |
| 2 | GND | - | Ground plane |
| 3 | Vbat | - | VBAT |
| 4 | 14 | - | PC13 |
| 5 | 13 | - | PC14 |
| 6 | 12 | - | PC15 |
| 7 | reset | - | NRST |
| 8 | 11 | - | PA0 |
| 9 | 10 | - | PA1 |
| 10 | 9 | - | PA2 |
| 11 | 8 | - | PA3 |
| 12 | 7 | - | PA4 |
| 13 | 6 | - | PA5 |
| 14 | 5 | - | PA6 |
| 15 | 4 | - | PA7 |
| 16 | 3 | - | PB0 |
| 17 | 2 | - | PB2 |
| 18 | 1 | - | PB10 |
| 19 | 0 | - | PB11 |
| 20 | vin | - | +5V input rail |
Header 2 properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 20x1, male) |
Header 2 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | Vcc | - | +3.3V rail |
| 2 | GND | - | Ground plane |
| 3 | but | - | PB8 |
| 4 | 15 | - | PB7 |
| 5 | 16 | - | PB6 |
| 6 | 17 | - | PB5 |
| 7 | 18 | - | PB4 |
| 8 | 19 | - | PB3 |
| 9 | 20 | - | PA15 |
| 10 | 21 | - | PA14 |
| 11 | 22 | - | PA13 |
| 12 | 23 | - | PA12 |
| 13 | 24 | - | PA11 |
| 14 | 25 | - | PA10 |
| 15 | 26 | - | PA9 |
| 16 | 27 | - | PA8 |
| 17 | 28 | - | PB15 |
| 18 | 29 | - | PB14 |
| 19 | 30 | - | PB13 |
| 20 | 31 | - | PB12 |
USB connector properties
| Name | USB |
| Reference | None |
| Type | USB Mini |
USB connector pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | VCC | +5V input rail |
| 2 | - | D- | PA11 |
| 3 | - | D+ | PA12 |
| 4 | - | ID | N.C. |
| 5 | - | GND | Ground plane |