2 ![CrazyBee F4 FS Pro front](images/CrazyBeeF4FSProTop.jpg)
3 ![CrazyBee F4 FS Pro back](images/CrazyBeeF4FSProBot.jpg)
6 CrazyBee F4 FS Pro flight controller is a Highly integrated board(Receiver/4in1 ESC/OSD/Current Sensor) for 1~2S Whoop brushless racing drone.
8 ## MCU, Sensors and Features
10 ### Hardware and Features
11 - MCU: STM32F411CEU6 (100MHZ, 512K FLASH)
14 - Battery Voltage Sensor: yes
15 - Power supply: 1-2S battery input (DC 3.5-8.7V)
16 - Built-in 5V 1A Buck / Boost with LC filter
17 - Integrated Current sensor:Max 28A,Current meter scale set to 1175
18 - Built-in SPI Flysky receiver with telemetry(AFHDS/AFHDS2A switchable)
19 - Integrated inverter for sbus(when use external rx) in UART1 RX
20 - Integrated 4x Blheli_s ESC: Max 5A per ESC(EMF8BB21F16G)
21 - ESC Connector: 3-pin, PicoBlade 1.25mm pitch
22 - Beeper output: 2-pin, soldering pad
23 - 4 Rx Indicating LEDs: 2 x red and 2 x white
24 - Board size: 28.5 * 28.5mm
28 | Label | Pin | Timer | DMA | Default | Note |
29 |----------------------------|------|-------|-----|-------------|----------------------------------|
30 | MPU6000_INT_EXTI | PA1 | | | | |
31 | MPU6000_CS_PIN | PA4 | | | | SPI1 |
32 | MPU6000_SCK_PIN | PA5 | | | | SPI1 |
33 | MPU6000_MISO_PIN | PA6 | | | | SPI1 |
34 | MPU6000_MOSI_PIN | PA7 | | | | SPI1 |
35 | OSD_CS_PIN | PB12 | | | | SPI2 |
36 | OSD_SCK_PIN | PB13 | | | | SPI2 |
37 | OSD_MISO_PIN | PB14 | | | | SPI2 |
38 | OSD_MOSI_PIN | PB15 | | | | SPI2 |
39 | RX_CS_PIN | PA15 | | | | SPI3 |
40 | RX_SCK_PIN | PB3 | | | | SPI3 |
41 | RX_MISO_PIN | PB4 | | | | SPI3 |
42 | RX_MOSI_PIN | PB5 | | | | SPI3 |
43 | RX_IRQ_PIN | PA14 | | | | |
44 | BIND_PLUG_PIN | PB2 | | | | |
45 | RX_LED_PIN | PB9 | | | | |
46 | PWM1 | PB8 | TIM2, CH3 | | | |
47 | PWM2 | PB9 | TIM4, CH1 | | | |
48 | PWM3 | PA3 | TIM4, CH2 | | | |
49 | PWM4 | PA2 | TIM4, CH3 | | | |
50 | VBAT_ADC_PIN | PB0 | | | | ADC1 |
51 | CURRENT_ADC_PIN | PB1 | | | | ADC1 |
52 | BEEPER | PC15 | | | | |
53 | UART1 TX | PA9 | | | | |
54 | UART1 RX | PA10 | | | | |
55 | UART2 TX | PA2 | | | | |
56 | UART2 RX | PA3 | | | | |
59 ## Manufacturers and Distributors
61 - Manufacturers: http://www.happymodel.cn/
62 - Distributors: Will add soon...
72 - User Manual: Will add soon...