Xiaomi Smart WIFI Module Rev 1.1 CMIIT ID: XXXXXXXXXXXXX Xiaomi Communications Co., Ltd. iot.mi.
Xiaomi Communications Co., Ltd. 1 Product description 1.1 Solution overview MHCWB4P-IB is an embedded high-performance WIFI + BLE module, using Realtek XMC1R chip platform solution.MHCWB4P-IB is an integrated U.FL seat, which needs to be equipped with IPEX Antenna for using. The two modules are mainly applicable to many IoT applications such as smart home appliances, home automation, and industrial Internet. 1.
Xiaomi Communications Co., Ltd. table 1-2.MHCWB4P-B&MHCWB4P-IB Parameters Table category parameter Wireless parameter Standard certification Hardware parameter Description Wi-Fi protocol 802.11 b/g/n Frequency Range 2.412 GHz ~ 2.462GHz Data interface UART/HSPI/I2C/I2S GPIO/PWM Software parameter Operating Voltage 2.7V ~ 3.
Xiaomi Communications Co., Ltd. figure 2-1. MHCWB4P-IB pin distribution MHCWB4P-IB has a total of 18 pins. See Table 2-1 for pin definitions. table 2-1. MHCWB4P-IB pin definition Number Pin name Description Power 1 VDD The maximum output current of the external power supply is recommended to be 500 mA and above.
Xiaomi Communications Co., Ltd. I/O 11 GPIO15 Debug RX I/O 12 GPIO16 Debug TX 13 GPIO20 I/O 14 GPIO23 I/O 15 GPIO3 I/O 16 GPIO1 I/O 17 GPIO0 I/O 18 GND Ground Note: When GPIO0 is powered on, do not pull it high, otherwise it will enter download mode. Module startup configuration table: 3 Electrical parameters Note: Unless otherwise specified, the test conditions are: VDD = 3.3V, temperature is 25 ℃. 3.1 Electrical characteristics table 3-1.
Xiaomi Communications Co., Ltd. Storage temperature - -40 Normal 85 ℃ temperature - -40 20 85 ℃ - -40 20 105 ℃ - - - 260 ℃ Supply voltage VDD 2.7 3.3 3.6 V Input-Low Voltage VIL -0.3 - 0.25 VDD V Input-High Voltage VIH 0.75 VDD - VDD + 0.3 V Output-Low Voltage VOL - - 0.1 VDD V Output-High Voltage VOH 0.
Xiaomi Communications Co., Ltd. 3.3 Reflow temperature curve Figure 3-1. MHCWB4P-IB Reflow temperature curve Soldering instructions: In double-sided SMT, after the T-side (top side) components are reflowed for the first time, the circuit board needs to be flipped and reflow soldered on the other side. In the second reflow, the already soldered T-side components will be fixed by the surface tension of the solder paste to prevent the components from dropping under the effect of gravity.
Xiaomi Communications Co., Ltd. 4 Peripheral design schematic Figure 4-1.
Xiaomi Communications Co., Ltd. Figure 5-1.MHCWB4P-IB mechanical dimension chart 6 U.FL Mechanical Dimension Figure 6-1.MHCWB4P-IB U.
Xiaomi Communications Co., Ltd. 7 MSL level / Storage conditions MSL level: Level 3-less than or equal to 30℃/ 60% RH 168 hours workshop life. Storage conditions: The products should be handled carefully during transportation, and they should not be squeezed against each other to avoid being impacted and strongly vibrated. The storage environment should be kept dry and ventilated. The ambient temperature should be between 5℃ and 35℃.
Xiaomi Communications Co., Ltd. Module design considerations The module is recommended to be placed at the corner of the plate, and the antenna is facing outwards. Keep a clearance of at least 15mm around the antenna. Keep it away from metal devices, sensors, highfrequency signal transmission devices, and high-frequency signal traces. Increase the distance from the location to the interference.
FCC Statement： Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the 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.
Revision History Revision History Date Version Release notes 2020.02 V0.1 Preliminary release for certification CE. Conformity Assessment of the Radio Module to the RED This radio module is for professional installation only.
