# KS4025 Keyestudio Micro:bit V2 Board

![](media/image-20260205113757152.png)

## 1. Description

Micro: bit is an ARM-based microcontroller designed by BBC. Consisting of onboard Bluetooth, accelerometer, electronic compass, three buttons, 5 x 5 LED dot matrix, it is only half the size of credit card and mainly used for programming education for teenagers. In order to carry it conveniently, we put a micro: bit control board and two manuals in storage bag. The storage bag is light and beautiful.

## 2. Specification

- Working voltage: 3.3V
- Power supply voltage: 3-3.3V
- Micro USB program burning/power supply port: 5V
- PH2.0 power interface: 3-3.3V
- Alligator clip interface: 3-3.3V
- Detection range: 0-3.3V
- Processor: Arm Cortex-M4 32 bit processor with FPU
- Working temperature: 0-85℃
- Micro USB program burning/power supply port
- PH2.0 3V power supply port
- 4mm alligator clip interface*5
- Gold finger interface*20
- Product size: 43*52mm
- Weight: 9.6g

## 3. Features

- Support PXT graphical programming interface developed by Microsoft
- Support Windows, macos, iOS and Android system
- The programming environment is based on WEB services, no need to download additional compilers
- Burn and simulate program via USB on PC terminal
- Burn and simulate program via Bluetooth
- Support multiple communication programming languages including javasript, python, mbed c.

## 4. On-board Resource

- Application Processor：Nordic nRF52833，64MHz ARM Cortex-M4, 512KB Flash、128KB RAM
- Bluetooth Wireless Communication：Bluetooth 5.1 with Bluetooth Low Energy，2.4GHz ISM ，50 2MHz channels
- Micro:bit Radio：2.4GHz Freq band，1Mbps or 2Mbps Channel rate
- LSM303AGRthree-axis accelerator and magnetic sensor
- Temperature sensing：on-core NRF52，Sensing range：-40℃ ~ 105℃
- Speaker：JIANGSU HUANENG MLT-8530
- Microphone：Knowles SPU0410LR5H-QB-7 MEMS，-38dB ±3dB @ 94dB SPL
- 25 Pcs red LEDs
- Three mechanical buttons including two user buttons and a reset button
- A touch logo
- MicroUSB power-supply/download connector，power socket, edge connector，including SPI, PWM, I2C, support 17 pcs GPIO

## 5. Function

![](media/image-20260205113929687.png)

## 6. Pins Description

![](media/image-20260205113948378.png)

| GPIO     | P0，P1，P2，P3，P4，P5，P6，P7，P8，P9，P10，P11，P12，P13，P14，P15，P16，P19，P20 |
| -------- | ------------------------------------------------------------ |
| ADC/DAC  | P0，P1，P2，P3，P4，P10                                      |
| I2C      | P19(SCL)，P20(SDA)                                           |
| SPI      | P13(SCK)，P14(MISO)，P15(MOSI)                               |
| PWM      | P0，P1，P2，P3，P4，P10                                      |
| Occupied | P3(LED Col1)，P4(LED Col2)，P5(BUTTON A)，P6(LED Col9)，P7(LED Col8)，P9(LED Col7)，P10(LED Col3)，P11(Button B) |

| Features             | V1.5                                                         | V2(New)                                                      |
| -------------------- | ------------------------------------------------------------ | ------------------------------------------------------------ |
| Processor            | Nordic Semiconductor nRF51822                                | Nordic Semiconductor nRF52833                                |
| RAM                  | 256KB Flash 16KB RAM                                         | 512KB Flash 128KB RAM                                        |
| Exterior Chip        | NXP KL26Z, 16KB RAM                                          | NXP KL27Z, 32KB RAM                                          |
| Microphone           | /                                                            | MEMS Microphone with LED Indicator                           |
| Speaker              | /                                                            | On-board Speaker                                             |
| Touch LOGO           | /                                                            | On-board touch LOGO                                          |
| Extension Port       | 25 pcs pins, 3 pcs GPIO pins, PWM, i2c, SPI and extension port, three digital/analog pins | 25 pcs pins, 4pcs GPIO pins, PWM, i2c, SPI and extension port, three digital/analog pins<br>Upgraded edge <br>connector design |
| I2C Bus              | Shared I2C Bus                                               | Specialized I2C Bus                                          |
| Wireless             | 2.4Ghz <br>Broadcast/Bluetooth 4.0                           | 2.4Ghz Broadcast<br>/Bluetooth 5.0                           |
| Power Supply         | Micro USB 5V power supply, 3V port or battery power supply   | Micro USB 5V power supply, 3V port or battery power supply   |
| Working Current      | 90mA                                                         | 200mA                                                        |
| Motion Sensor        | ST LSM 303                                                   | ST LSM 303                                                   |
| Programming Software | C++, Makecode, Python, Scratch                               | C++, Makecode,Python, Scratch                                |
| Size                 | 5cm*4cm                                                      | 5cm*4cm                                                      |