BU-01 is developed based on DecaWave's DW1000 chip. The module integrates antenna, all radio frequency circuits, power management and clock modules. The module can use two-way ranging or TDOA positioning systems, with a positioning accuracy of 10cm and a data transmission rate of up to 6.8Mbps. It is widely used in nursing homes, parking lots and other fields.Product Parameters:Antenna form: onboard PCB antennaFrequency range: 3.5 GHz to 6.5 GHzInterface: PWM/I2C/GPIO, all IO of MCUWorking temperature; -40℃ ~ 85 ℃Storage environment: -40 ℃ ~ 125 ℃, <90%RHPower supply range: 5V or 3.3VPower consumption Development board backplane: 160mA (with MCU, sensor)Product size: 35*55.5(±0.2)(W*H) mm

Pin Description:

IO7: The default value is used as SYNC input. This pin can be reconfigured as a general-purpose I/O pin GPIO7 under software control.IO6: General purpose I/O pin. At power-up, it is used as the SPIPHA (SPI phase selection) pin for configuring the SPI operating mode. After power-up, this pin will default to a general-purpose I/O pin.IO5: General-purpose I/O pin. At power-up, it is used as the SPIPOL (SPI polarity selection) pin for configuring the SPI operating mode. After power-up, this pin will default to a general-purpose I/O pin.IO4: General purpose I/O pin.IRQ: Interrupt request output from DWM1000 to host processor and connected to PB0 of MCU. By default, IRQ is an active high output, but if necessary, it can be configured as active low. In order to operate correctly in SLEEP and DEEPSLEEP modes, it should be configured for active high operation. This pin will float in sleep and DEEPSLEEP states, unless it is pulled low, it may cause a spurious interrupt. When the IRQ function is not used, this pin can be reconfigured as the general-purpose I/O line GPIO8.CLK: SPI clock and connected to PA5 of MCUMISO: SPI data output and connect to PA6 of MCUMOSI; SPI data input and connected to PA7 of MCUCSN: SPI chip select and connect with PA4 of MCU. This is an active low enable input. A high-to-low transition on SPICSn indicates the start of a new SPI transaction. SPICSn can also be used as a wake-up signal to make DW1000 exit sleep or sleep state.PA3: PA3 on MCUPB1: PB1 on the MCUPB10: PB10 on MCUPB11: PB11 on MCULED1: PA2 on MCU, connect to LED1LED2: PA1 on MCU, connect to LED2BTN: PA0 on MCU, connect to BTN buttonRESET: Reset pin on MCU, connected to reset buttonGND: GroundGND: GroundV3.3: 3.3V power supplyV5 5V: power supplyV3.3: 3.3V power supplyGND: GroundVBAT: MCU battery power supply VbatSCL: The SCL pin on the MCU, the default is to pull up 3.3V, and the sensor SCL pin is internally connectedSDA: SDA pin on MCU, 3.3V is pulled up by default, internal sensor SDA pinPB8: PB8 on MCUPB9: PB9 on MCUPB5: PB5 on MCUPB4: PB4 on the MCUPB3: PB3 on the MCUPA15: PA15 on MCUV3.3: 3.3V power supplyRST: Reset pin on BU01 and connected to PB12 of MCUWAKEUP: Wake-up pin on BU01 and connected to PB13 of MCU. When set to active high state, WAKEUP pin brings DW1000 from sleep or DEEPSLEEP state into working mode. If not used, this pin can be groundedEXTON: The EXTON pin on BU01 is connected to PB14 of MCU, and the external device is enabled. Set during the wake-up process and remain active until the device enters sleep mode. Can be used to control external DC-DC converters or other circuits that are not needed when the device is in sleep mode to minimize power consumptionU1RX: UART1-RX on MCUU1TX: UART1-TX on MCUPA8: PA8 on MCUPB15: PB15 on MCUDIO: SWDIO pin on Swdio MCU, the default MCU programming pinCLK: SWDIO pin on Swclk MCU, the default MCU programming pinBT0: BOOT0 pin on BOOT0 MCU, which controls MCU startup modeBT1: BOOT1 pin on BOOT1 MCU, which controls MCU startup modeRESET: button RESET reset button BTN/PA0 buttonBTN/PA0: Press the button to raise the PA0 pinInstructions for use:The BOOT pin controls the startup mode: