CJMCU-3206
STM32F103T8U6
Board
| Name | CJMCU-3206 |
| Part | CJMCU-3206 |
| Brand | CJMCU |
| Origin | China |
Microcontroller
| Part | STM32F103T8U6 |
| Manufacturer | ST-Microelectronics |
| Core | Arm Cortex-M3 |
| Max. Clock Speed | 72MHz |
| Package | UFQFPN 36 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) |
| VDDA pin | No |
| VSSA pin | No |
| VREF- pin | No |
| VREF+ pin | No |
| Backup battery | None |
Regulator
| Manufacturer | Microchip Technology Inc. |
| Part | MIC5219 (LG33) |
| Package | SOT23-5 5 pins |
| Input | +4.3V to +12V |
| Output | +3.3V @ 500mA |
| Datasheet | MIC5219.pdf |
PCB
| Color | Purple |
| Size (w x l) | 28mm x 35mm |
| Mounting | 4x mounting hole (M3) |
Remarks
Pictures
Resources
Outputs
Connectors
Devices
Inputs & outputs
User button 1
| Name | - |
| Reference | - |
| Type | Button |
| Connected to | PB7 |
| Mode | Active low |
User button 2
| Name | - |
| Reference | - |
| Type | Button |
| Connected to | PB6 |
| Mode | Active low |
User button 3
| Name | - |
| Reference | - |
| Type | Button |
| Connected to | PB5 |
| Mode | Active low |
User button 4
| Name | - |
| Reference | - |
| Type | Button |
| Connected to | PB4 |
| Mode | Active low |
Power LED
| Name | - |
| Reference | - |
| Type | LED |
| Connected to | +3.3V rail |
| Mode | N.A. |
Bluetooth module LED
| Name | - |
| Reference | - |
| Type | LED |
| Connected to | PIO2 pin on HC06 |
| Mode | Source |
Connectors & headers
Header 1 properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 8x1, male) |
Header 1 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | +5V | - | +5V rail |
| 2 | GND | - | Ground plane |
| 3 | D4 | - | PA4 |
| 4 | D3 | - | PA3 |
| 5 | D2 | - | PA2 |
| 6 | D1 | - | PA1 |
| 7 | PB7 | - | PB7 |
| 8 | PB6 | - | PB6 |
Header 2 properties
| Name | Unknown |
| Reference | None |
| Type | pin header (2.54mm, 8x1, male) |
Header 2 pins
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | +5V | - | +5V rail |
| 2 | 3.3 | - | +3.3V rail |
| 3 | GND | - | Ground plane |
| 4 | UTX | - | PB14 |
| 5 | URX | - | PB15 |
| 6 | RST | - | NRST |
| 7 | DIO | - | PA13 |
| 8 | CLK | - | PA14 |
Power connector properties footprint
| Name | Unknown |
| Reference | None |
| Type | Solder connection |
Power connector pins footprint
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | VIN | - | +5V rail via diode |
| 2 | GND | - | Ground plane |
Devices
HC06 properties footprint
| Name | Unknown |
| Reference | Unknown |
| Manufacturer | Guangzhou HC Information Technology Co., Ltd. |
| Part | HC06 |
| Marking | HC06 |
| Datasheet | HC06.pdf |
| Package | PCB module 34 pins |
| Description | Serial Bluetooth transceiver |
HC06 pins footprint
| # | Name | Function | Connected to |
|---|---|---|---|
| 1 | - | UART_TXD | PB15 |
| 2 | - | UART_RXD | PB14 |
| 3 | - | CTS | N.C. |
| 4 | - | RTS | N.C. |
| 5 | - | PCM_CLK | N.C. |
| 6 | - | PCM_OUT | N.C. |
| 7 | - | PCM_IN | N.C. |
| 8 | - | PCM_SYNC | N.C. |
| 9 | - | AIO0 | N.C. |
| 10 | - | AIO1 | N.C. |
| 11 | - | RESET | PA14 |
| 12 | - | 3.3V | +3.3V rail |
| 13 | - | GND | Ground plane |
| 14 | - | NC | N.C. |
| 15 | - | USB D- | N.C. |
| 16 | - | CSB | N.C. |
| 17 | - | MOSI | N.C. |
| 18 | - | MISO | N.C. |
| 19 | - | CLK | N.C. |
| 20 | - | USB D+ | N.C. |
| 21 | - | GND | Ground plane |
| 22 | - | GND | Ground plane |
| 23 | - | PIO0 | N.C. |
| 24 | - | PIO1 | N.C. |
| 25 | - | PIO2 | Bluetooth module LED |
| 26 | - | PIO3 | PB0 |
| 27 | - | PIO4 | PB1 |
| 28 | - | PIO5 | Ground plane |
| 29 | - | PIO6 | PB2 |
| 30 | - | PIO7 | N.C. |
| 31 | - | PIO8 | N.C. |
| 32 | - | PIO9 | N.C. |
| 33 | - | PIO10 | N.C. |
| 34 | - | PIO11 | N.C. |