CBU 是由杭州涂鸦信息技术有限公司开发的一款低功耗嵌入式 Wi-Fi 模组。它由一个高集成度的无线射频芯片 BK7231N 和少量外围器件构成，可以支持 AP 和 STA 双角色连接，并同时支持 BLE 连接。
CBU 内置运行速度最高可到 120 MHz 的 32-bit MCU 以及内置的 256 KB RAM，可以使得模组支持多云连接，并且 MCU 专为信号处理扩展的指令使其可以有效地实现音频编码和解码。拥有丰富的外设，如 PWM、UART、SPI。多达五路的 32 位 PWM 输出使芯片非常适合高品质的 LED 控制。
| 更新日期 | 更新内容 | 更新后版本 |
|---|---|---|
| 2020-10-16 | 新建文档 | V1.0.0 |
| 2020-11-24 | 更新测试数据 | V1.0.1 |
CBU尺寸大小：15.8±0.35mm (W)×20.3±0.35mm (L) ×3±0.1mm (H)。CBU尺寸如下图所示：
| 引脚序号 | 符号 | IO类型 | 功能 |
|---|---|---|---|
| 1 | P14 | I/O | 普通GPIO，可以复用为SPI_SCK |
| 2 | P16 | I/O | 普通GPIO，可以复用为SPI_MOSI |
| 3 | P20 | I/O | 普通GPIO |
| 4 | P22 | I/O | 普通GPIO |
| 5 | ADC | I | ADC口，对应IC的P23 |
| 6 | RX2 | I/O | UART_RX2，对应IC的P1 |
| 7 | TX2 | I/O | UART_TX2，打印日志口，对应IC的P0 |
| 8 | P8 | I/O | 支持硬件PWM |
| 9 | P7 | I/O | 支持硬件PWM |
| 10 | P6 | I/O | 支持硬件PWM |
| 11 | P26 | I/O | 支持硬件PWM |
| 12 | P24 | I/O | 支持硬件PWM |
| 13 | GND | P | 电源地 |
| 14 | 3V3 | P | 电源3V3 |
| 15 | TX1 | I/O | UART_TX1，用户数据发送口，对应IC的P11 |
| 16 | RX1 | I/O | UART_RX1，用户数据接收口，对应IC的P10 |
| 17 | P28 | I/O | 普通GPIO |
| 18 | CEN | I/O | 复位脚 |
| 19 | P9 | I/O | 普通GPIO |
| 20 | P17 | I/O | 普通GPIO，可以复用为SPI_MISO |
| 21 | P15 | I/O | 普通GPIO，可以复用为SPI_CS |
| 测点 | CSN | I/O | 模式选择脚，上电前拉低进入测试固件，悬空或拉高进入应用固件。对应IC的P21 |
说明：P 表示电源引脚，I/O 表示输入输出引脚。
| 参数 | 描述 | 最小值 | 最大值 | 单位 |
|---|---|---|---|---|
| Ts | 存储温度 | -55 | 125 | ℃ |
| VBAT | 供电电压 | -0.3 | 3.9 | V |
| 静电释放电压（人体模型） | TAMB-25℃ | -4 | 4 | kV |
| 静电释放电压（机器模型） | TAMB-25℃ | -200 | 200 | V |
| 参数 | 描述 | 最小值 | 典型值 | 最大值 | 单位 |
|---|---|---|---|---|---|
| Ta | 工作温度 | -40 | - | 105 | ℃ |
| VBAT | 供电电压 | 2.1 | 3.3 | 3.6 | V |
| VOL | IO低电平输出 | VSS | - | VSS+0.3 | V |
| VOH | IO高电平输出 | VBAT-0.3 | - | VBAT | V |
| Imax | IO驱动电流 | - | 6 | 20 | mA |
| 工作状态 | 模式 | 速率 | 发射功率/接收 | 平均值 | 峰值(典型值) | 单位 |
|---|---|---|---|---|---|---|
| 发射 | 11b | 11Mbps | +17dBm | 180 | 304 | mA |
| 发射 | 11g | 54Mbps | +15dBm | 95 | 280 | mA |
| 发射 | 11n | MCS7 | +14dBm | 101 | 273 | mA |
| 接收 | 11b | 11Mbps | 连续接收 | 73 | 76 | mA |
| 接收 | 11g | 54Mbps | 连续接收 | 75 | 78 | mA |
| 接收 | 11n | MCS7 | 连续接收 | 75 | 78 | mA |
| 工作模式 | 工作状态，Ta=25℃ | 平均值 | 最大值(典型值) | 单位 |
|---|---|---|---|---|
| 快连配网状态（蓝牙配网） | 模组处于快连配网状态，Wi-Fi指示灯快闪 | 88 | 130 | mA |
| 快连配网状态（AP配网） | 模组处在热点配网状态，Wi-Fi指示灯慢闪 | 95 | 180 | mA |
| 快连配网状态（EZ配网） | 模组处于快连配网状态，WIFI指示灯快闪 | 90 | 168 | mA |
| 网络连接状态 | 模组处于联网工作状态， Wi-Fi 指示灯常亮 | 90 | 134 | mA |
| 参数项 | 详细说明 |
|---|---|
| 工作频率 | 2.412~2.484GHz |
| Wi-Fi标准 | IEEE 802.11b/g/n(通道1-14) |
| 数据传输速率 | 11b:1,2,5.5, 11 (Mbps)； 11g:6,9,12,18,24,36,48,54(Mbps); 11n: HT20 MCS0~7; |
| 天线类型 | PCB天线或FPC天线 |
| 参数项 | 最小值 | 典型值 | 最大值 | 单位 |
|---|---|---|---|---|
| RF平均输出功率，802.11b CCK Mode 11M | - | 17 | - | dBm |
| RF平均输出功率，802.11g OFDM Mode 54M | - | 15 | - | dBm |
| RF平均输出功率，802.11n OFDM Mode MCS7 | - | 14 | - | dBm |
| 频率误差 | -20 | - | 20 | ppm |
| 参数项 | 最小值 | 典型值 | 最大值 | 单位 |
|---|---|---|---|---|
| PER<8%，RX灵敏度，802.11b DSSS Mode 11M | - | -88 | - | dBm |
| PER<10%，RX灵敏度，802.11g OFDM Mode 54M | - | -72 | - | dBm |
| PER<10%，RX灵敏度，802.11n OFDM Mode MCS7 | - | -67 | - | dBm |
| PER<10%，RX灵敏度，BLE 1M | - | -93 | - | dBm |
| 参数项 | 最小值 | 典型值 | 最大值 | 单位 |
|---|---|---|---|---|
| 工作频率 | 2402 | - | 2480 | MHz |
| 空中速率 | - | 1 | - | Mbps |
| 发射功率 | -20 | 6 | 20 | dBm |
| 频率误差 | -150 | - | 150 | KHz |
| 参数项 | 最小值 | 典型值 | 最大值 | 单位 |
|---|---|---|---|---|
| RX灵敏度 | - | -93 | - | dBm |
| 最大射频信号输入 | -10 | - | - | dBm |
| 互调 | - | - | -23 | dBm |
| 共信道抑制比 | - | 10 | - | dB |
CBU天线可以选择PCB天线或者FPC天线。
在Wi-Fi模组上使用PCB板载天线时，为确保Wi-Fi性能的最优化，建议模组天线部分和其他金属件距离至少在15mm以上。
用户PCB板在天线区域勿走线甚至覆铜，以免影响天线性能。
涂鸦出厂的邮票口封装模组必须由SMT机器贴片，并且拆开包装烧录固件后必须24小时内完成贴片，否则要重新抽真空包装，贴片前要对模组进行烘烤。
涂鸦出厂的模组存储条件如下：
涂鸦出厂的模组需要烘烤，湿度指示卡及烘烤的几种情况如下所述：
烘烤参数如下：
如果拆封时间超过3个月，禁止使用SMT工艺焊接此批次模组，因为此PCB为沉金工艺，超过3个月后焊盘氧化严重，SMT贴片时极有可能导致虚焊、漏焊，由此带来的种种问题我司不承担相应责任
SMT贴片前，请对模组进行ESD（静电放电、静电释放）保护
为了确保回流焊合格率，首次贴片请抽取10%产品进行目测、AOI检测，以确保炉温控制、器件吸附方式、摆放方式的合理性之后的批量生产建议每小时抽取5-10片进行目测、AOI检测。
请根据回流焊曲线图进行SMT贴片，峰值温度245℃，回流焊温度曲线如下图所示：
| 产品型号 | MOQ（pcs） | 出货包装方式 | 出货包装方式 | 每箱包装卷盘数（盘） |
|---|---|---|---|---|
| CBU | 3600 | 载带卷盘 | 900 | 4 |
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
This device complies with Part 15 of the FCC Rules.Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.
Important Note
This radio module must not installed to co-locate and operating simultaneously with other radios in host system except in accordance with FCC multi-transmitter product procedures. Additional testing and equipment authorization may be required to operating simultaneously with other radio.
The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end user.
The host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.
The end user manual shall include all required regulatory information/warning as shown in this manual, including: This product must be installed and operated with a minimum distance of 20 cm between the radiator and user body.
This device have got a FCC ID：2ANDL-CBU.The final end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-CBU”
This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20cm is maintained between the antenna and users, and
The transmitter module may not be co-located with any other transmitter or antenna.
As long as 2 conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed.
Declaration of Conformity European notice
Hereby, Hangzhou Tuya Information Technology Co., Ltd declares that this module product is in compliance with essential requirements and other relevant provisions of Directive 2014/53/EU,2011/65/EU.A copy of the Declaration of conformity can be found at https://www.tuya.com
This product must not be disposed of as normal household waste, in accordance with EU directive for waste electrical and electronic equipment (WEEE- 2012/19/EU). Instead，it should be disposed of by returning it to the point of sale, or to a municipal recycling collection point.
The device could be used with a separation distance of 20cm to the hung collection point.