# Board - DALRCF722DUAL

The DALRCF722DUAL  described here:

This board use the STM32F722RET6 microcontroller and have the following features:
* High-performance and DSP with FPU, ARM Cortex-M7 MCU with 512 Kbytes Flash 
* 216 MHz CPU,462 DMIPS/2.14 DMIPS/MHz (Dhrystone 2.1) and DSP instructions, Art Accelerator, L1 cache, SDRAM
* DUAL gyro MPU6000 and ICM20602,could choose mpu6000,more stable and smooth.Or choose ICM20602,higher rate(32K/32K).Choose on CLI mode,experience different feature gyro on same board
* OSD on board
* The 16M byte SPI flash on board for data logging
* USB VCP and boot select button on board(for DFU)
* Stable voltage regulation,DUAL BEC  5v/2.5A and 10v/2A for VTX/camera etc.And could select 5v/10v with pad
* Serial LED interface(LED_STRIP)
* VBAT/CURR/RSSI sensors input
* Suppose IRC Tramp/smart audio/FPV Camera Control/FPORT/telemetry
* Supports SBus(built-in inverters), Spektrum1024/2048, PPM
* Supports I2C device extend(baro/compass/OLED etc)(socket)
* Supports GPS (socket)

### All uarts have pad on board 
| Value | Identifier   | RX   | TX   | Notes                                                                                       |
| ----- | ------------ | -----| -----| ------------------------------------------------------------------------------------------- |
| 1     | USART1       | PB7  |  PB6 |  PB7 FOR SBUS IN(inverter build in)/PPM                                                         |
| 2     | USART2       | PA3  |  PA2 |  PAD USE FOR TRAMP/smart audio                                                              |
| 3     | USART3       | PC11 |  PC10|  USE FOR GPS                                                                                |
| 4     | USART4       | PA1  |  PA0 |  PA0 FOR RSSI/FPORT/TEL etc                                                                 |
| 5     | USART5       | PD2  |  PC12|  PAD                                                                                        |


### I2C with GPS port together.Use for BARO or compass etc 
| Value | Identifier   | function |  pin   | Notes                                                                                 |
| ----- | ------------ | ---------| -------| ------------------------------------------------------------------------------------- |                                                                                      
| 1     | I2C1         |    SDA   |  PB9   | 
| 2     | I2C1         |    SCL   |  PB8   | 


### Buzzer/LED output 
| Value | Identifier   | function |  pin   | Notes                                                                                 |
| ----- | ------------ | ---------| -------| ------------------------------------------------------------------------------------- |                                                                                      
| 1     | LED0         |    LED   |  PC14  |On board
| 2     | BEEPER       |    BEE   |  PC13  |Pad 


### VBAT input with 1/10 divider ratio,Current signal input,Analog/digit RSSI input
| Value | Identifier   | function  |  pin  | Notes                                                                                 |
| ----- | ------------ | ----------| ------| ------------------------------------------------------------------------------------- |                                                                                       
| 1     | ADC1         |    VBAT   |  PC1  |  
| 2     | ADC1         |    CURR   |  PC0  |  
| 3     | ADC1         |    RSSI   |  PA0  |   


### 8 Outputs 
| Value | Identifier   | function  |  pin  | Notes                                                                                 |
| ----- | ------------ | ----------| ------| ------------------------------------------------------------------------------------- |                                                                                       
| 1     | TIM4_CH2     |    PPM    |  PB7  |  PPM
| 2     | TIM8_CH1     |    OUPUT1 |  PC6  |  DMA
| 3     | TIM8_CH2     |    OUPUT2 |  PC7  |  DMA
| 4     | TIM8_CH3     |    OUPUT3 |  PC8  |  DMA
| 5     | TIM8_CH4     |    OUPUT4 |  PC9  |  DMA
| 6     | TIM1_CH1     |    OUPUT5 |  PA8  |  DMA
| 7     | TIM1_CH2     |    OUPUT6 |  PA9  |  DMA  
| 8     | TIM1_CH3     |    OUPUT7 |  PA10 |  DMA   NO PAD
| 9     | TIM2_CH4     |    OUPUT8 |  PB11 |  NO PAD
| 10    | TIM2_CH1     |    PWM    |  PA15 |  DMA  LED_STRIP
| 11    | TIM3_CH4     |    PWM    |  PB1  |  FPV Camera Control(FCAM)


### Gyro & ACC ,support ICM20602 and MPU6000
| Value | Identifier   | function |  pin   | Notes                                                                                 |
| ----- | ------------ | ---------| -------| ------------------------------------------------------------------------------------- |                                                                                      
| 1     | SPI1         |    SCK   |  PA5   | MPU6000 & ICM20602
| 2     | SPI1         |    MISO  |  PA6   | MPU6000 & ICM20602
| 3     | SPI1         |    MOSI  |  PA7   | MPU6000 & ICM20602
| 4     | SPI1         |    CS1   |  PB0   | MPU6000
| 5     | SPI1         |    CS2   |  PA4   | ICM20602 
| 6     | SPI1         |    INT1  |  PB10  | MPU6000
| 7     | SPI1         |    INT2  |  PC4   | ICM20602

### OSD MAX7456
| Value | Identifier   | function |  pin   | Notes                                                                                 |
| ----- | ------------ | ---------| -------| ------------------------------------------------------------------------------------- |                                                                                      
| 1     | SPI2         |    SCK   |  PB13  | 
| 2     | SPI2         |    MISO  |  PB14  | 
| 3     | SPI2         |    MOSI  |  PB15  | 
| 4     | SPI2         |    CS    |  PB12  |

### 16Mbyte flash
| Value | Identifier   | function |  pin   | Notes                                                                                 |
| ----- | ------------ | ---------| -------| ------------------------------------------------------------------------------------- |                                                                                      
| 1     | SPI3         |    SCK   |  PB3   | 
| 2     | SPI3         |    MISO  |  PB4   | 
| 3     | SPI3         |    MOSI  |  PB4   | 
| 4     | SPI3         |    CS    |  PB2   | 

### SWD
| Pin | Function       | Notes                                        |
| --- | -------------- | -------------------------------------------- |
| 1   | SWCLK          | PAD                                          |
| 2   | Ground         | PAD                                          |
| 3   | SWDIO          | PAD                                          |
| 4   | 3V3            | PAD                                          |

![DALRCF722DUAL top](images/DALRCF722DUAL-Top.png)
![DALRCF722DUAL bottom](images/DALRCF722DUAL-Botton.jpg)


###Designers
* ZhengNyway(nyway@vip.qq.com)