BK3435硬件资源综述
## 产品介绍
BK3435芯片是一款高度集成的5.0低功耗单模蓝牙芯片，通过BLE 5.0认证(DID: D040065)。它集成了高性能的射频收发器、基带、单片机、丰富的功能外设、可编程的协议和配置文件来支持BLE的应用。内置Flash架构使它适合于定制的应用程序。
## 引脚定义(QFN32 4*4 封装)
|PIN| Name |Pin Function| Description
|-|-|-|-|
|1| VCCIF| Power |IF power, 1.5 V
|2| XTALO| Analog |16 MHz crystal output|
|3| XTALI| Analog| 16 MHz crystal input|
|4| P31 |Digital I/O| General purpose IO,Ch1
|5| P32 |Digital I/O| General purpose IO,Ch2
|6| P10 |Digital I/O| General purpose IO,PWM[0]（20mA）
|7| P11| Digital I/O |General purpose IO,PWM[1]（20mA
|8| RSTN| Analog| Active low pin reset
|9| XTAL32K| Analog| 32 kHz Crystal input
|10 |MIC_BIAS| Analog| Microphone bias voltage output, 1.5 V
|11| MIC_N| Analog| Microphone input N
|12 |MIC_P| Analog| Microphone input P
|13 |P33| Digital I/O| General purpose IO,Ch3/CKAUDIO
|14 |VDDSPI |Analog| LDO output, 1.5 V
|15| VBAT1V| Analog |One battery mode (battery input) or two battery mode (Ground)
|16 |VSSBAT| Ground| Ground
|17| SW |Analog |Switch regulator pin for two battery mode
|18| VCCBAT| Power| Power, 3 V
|19| CP1| Analog| Charge pump component for FLASH
|20| CP2 |Analog |Charge pump component for FLASH
|21| CPOUT| Power| Charge pump output voltage for FLASH
|22|VCCMCU| Power| Power, 1.5 V
|23 |P00| Digital| I/O General purpose IO,UART_TX
|24| P01| Digital |I/O General purpose IO,UART_RX
|25 |P02| Digital |I/O General purpose IO,SCL-IR_TRX
|26| P03| Digital |I/O General purpose IO,SDA
|27| P04 |Digital |I/O General purpose IO,SPI_SCK
|28 |P05| Digital| I/O General purpose IO,SPI_MOSI
|29| P06| Digital| I/O General purpose IO,SPI_MISO
|30| P07 |Digital| I/O General purpose IO,SPI_NSS
|31| VCCRF| Power| RF power, 1.5 V
|32 |ANT |RF |RF signal port
# 硬件资源
支持可选 BUCK 或 LDO 供电，工作电流低至 35uA。
电压供电范围 0.9V~3.6V,支持单节干电池。
|GPIO|IIC|SPI|UART|MIC|PWM|ADC|
|-|-|-|-|-|-|-|
||1路：P02 SCL,P03 SDA|1路：P04 SCK, P05,MOSI,P06 MISO,P07 NSS|1路：P00 UART1_TXD ,P01 UART1 _RXD|
支持 MIC 输入。
500K Flash，64K RAM。
13 个 GPIO
1 路 UART 口、2 路 PWM 口、3 路 ADC 通道、SPI、IIC。