Product Descriptions
BU04 Kit is a dual antenna ultra wideband development board designed based on the BU04 module. The BU04 module on the board integrates DW3000+STM32F103 MCU and supports dual onboard antennas or dual IPEX external antennas. BU04 can be used in bidirectional ranging, TWR or PDOA positioning systems, with a positioning accuracy of up to 10 centimeters and supporting a data rate of up to 6.8 Mbps. It can be widely applied in precise positioning of coal mine underground positioning, hospital personnel positioning, warehouse positioning, various indoor positioning and other fields
Product Specifications
| 模组型号 Module model | BU04-Kit |
| 模组封装 Module packaging | DIP-40 |
| 尺寸(mm) Size(mm) | 46.00*52.00(±0.2)MM |
| 天线形式 Antenna form | 板载PCB天线兼容IPEX座 Onboard PCB antenna compatible with IPEX socket |
| 中心频点 Center frequency point | CH5(6489.5MHz)、CH9(7987.2MHz) |
| 工作环境 Work environment | -40℃ ~85℃ |
| 存储环境 Storage environment | -40℃~125°C,<90%RH |
| 供电范围 Power supply range | 供电电压USBType-C或者插针3.3或者5V供电。供电电流≥500mA The power supply voltage is USB Type-C or pin 3.3 or 5V. Supply current ≥500mA |
| 支持接口 Support interfaces | SPI，UART,I2C |
| 可用IO口数量 Number of available IO ports | 20 |
| 内置MCU Built in MCU | STM32F103 |
Module power consumption
The following power consumption data is based on a 3.3V power supply and measured at an ambient temperature of 25 ° C.
| 模式 Mode | 最小值 Minimum value | 平均值 Average value | 最大值 Maximum value | 单位 unit |
| CH5 发射，速率0.85Mbps CH5 transmission, speed 0.85Mbps | - | 45.39 | - | mA |
| CH5 发射，速率6.81Mbps CH5 transmission, speed 6.81Mbps | - | 43.19 | - | mA |
| CH9 发射，速率0.85Mbps CH9 transmission, speed 0.85Mbps | - | 53.18 | - | mA |
| CH9 发射，速率6.81Mbps CH9 transmission, speed 6.81Mbps | - | 51.16 | - | mA |
| CH5 接收，速率0.85Mbps CH5 reception, speed 0.85Mbps | - | 50.83 | - | mA |
| CH5 接收，速率6.81Mbps CH5 reception, speed 6.81Mbps | - | 51.19 | - | mA |
| CH9 接收，速率0.85Mbps CH9 reception, speed 0.85Mbps | - | 79.28 | - | mA |
| CH9 接收，速率6.81Mbps CH9 reception, speed 6.81Mbps | - | 79 | - | mA |
The BU04 Kit development board has a total of 40 pin connections, as shown in the schematic diagram. The pin function definition table is the interface definition:
| ① | 预留 IPEX 天线座 Reserve IPEX antenna base |
| ② | 通信指示灯 Communication indicator |
| ③ | 电源指示灯 Power indicator light |
| ④ | 运行指示灯 Operation indicator |
| ⑤ | 复位按键 RESET |
| ⑥ | 烧录控制按键，按下BOOT0引脚拉高，可串口烧录 Burn control button, press BOOT0 pin to pull up, can burn serial port |
| ⑦ | USB 通信上位机测距数据交互口 USB communication upper computer ranging data exchange port |
| ⑧ | AT指令+程序烧录口 AT command+program burning port |
Attention: The development board comes with a jump cap when it leaves the factory. BOOT1 and BOOT0 are pulled down by default, and pressing the button will have the same effect as jumping the cap to a high level, controlling serial port burning.
| 启动模式选择引脚 Startup mode selection pin | 启动模式 Start Mode | 说明 Describe | |
| BOOT1 | BOOT0 | ||
| X | 0 | 主闪存存储器 Main flash memory storage | 主闪存存储器被选的定位启动区域 The selected location boot area for the main flash memory storage |
| 0 | 1 | 系统存储器 System memory | 系统存储器被选定为启动区域 The system memory is selected as the boot area |
| 1 | 1 | 内置 SRAM Built in SRAM | 内置 SRAM 被选定为启动区域 Built in SRAM is selected as the boot area |
Product Pin definition
| 脚序 Foot sequence | 名称 Name | 功能说明 Function Description |
| 1 | GND | GND |
| 2 | ST_NRST | NRST |
| 3 | LED_RUN | PA1_LED_RUN, ADC_IN1/USART2_RTS/TIM2_CH2 |
| 4 | UART2_TX | ADC_IN2/USART2_TX/TIM2_CH3 |
| 5 | UART2_RX | ADC_IN3/USART2_RX/TIM2_CH4 |
| 6 | PB15 | PB15,SPI2_MOSI/TIM1_CH3N |
| 7 | PB14 | PB14,SPI2_MISO/USART3_RTSTIM1_CH2N |
| 8 | PB13 | PB13,SPI2_SCK/USART3_CTS/TIM1_CH1N |
| 9 | PB12 | PB12,SPI2_NSS/I2C2_SMBA1/USART3_CK/TIM1_BKIN |
| 10 | GND | GND |
| 11 | DW_WAKEUP | PA0WKUP,PA0,WKUP/USART2_CTS(9)/ADC12_IN0/TIM2_CH1_ETR |
| 12 | DW_RXTN | DW_RXTN |
| 13 | SPI1_CLK | ADC_IN5/SPI1_SCK |
| 14 | SPI1_MOSI | ADC_IN7/SPI1_MOSI/TIM3_CH2 |
| 15 | SPI1_MISO | ADC_IN6/SPI1_MISO/TIM3_CH1 |
| 16 | SPI1_CSN | ADC_IN4/SPI1_NSS/USART2_CK |
| 17 | DW_IRQIO | DW_IRQ/GPIO8 |
| 18 | WIFI_BOOT | WIFI_BOOT |
| 19 | WIFI_RXD | WIFI_RXD |
| 20 | WIFI_TXD | WIFI_TXD |
| 21 | GND | GND |
| 22 | 5V | 5V |
| 23 | 3V3 | 3V3 |
| 24 | LEDRX | LEDRX |
| 25 | LEDTX | LEDTX |
| 26 | DW_GPIO5 | IO5/EXTTXE/SPIPOL |
| 27 | DW_GPIO6 | IO6/EXTRXE/SPIPHA |
| 28 | DW_SYNC | DW_SYNC |
| 29 | 3V3 | 3V3 |
| 30 | EXTON | EXTON_PA8 |
| 31 | UART1_TX | UART1_TX |
| 32 | UART1_RX | UART1_RX |
| 33 | USB_DM | USB_DM |
| 34 | USB_DP | USB_DP |
| 35 | I2C1_SCL | I2C1_SDA/TIM4_CH2/USART1_RX |
| 36 | I2C1_SDA | I2C1_SCL/TIM4_CHI/USART1_TX |
| 37 | GND | GND |
| 38 | SWDIO | SWDIO |
| 39 | SWCLK | SWCLK |
| 40 | 3V3 | 3V3 |
Product Size
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Standard packaging
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