SDIO: data port GPIO: It may also be a data port or a interrupt (no chip or circuit diagram, can not be judged) GND, 3V need not explain. Directly use IO port control, it is estimated to simulate SPI timing.
Power connection: Connect the power pin of the Bluetooth module to the power pin of the MCU. Ensure that the supply voltage and current meet the requirements of the Bluetooth module. Ground connection: Connect the ground pin of the Bluetooth module to the ground pin of the single chip computer to ensure that the current loop is complete. communicationPin connection: Connect the serial communication pins of the Bluetooth module (usually TXD and RXD) to the corresponding pins of the MCU. Use a logic level converter to ensure level compatibility.
NRF905 wireless communication module is SPI interface communication, if I remember correctly, it should be 3V power supply; The universal I/O port of the single chip microcomputer can be connected, the universal I/O port can use software to simulate SPI communication, if you use the single chip microcomputer with hardware SPI module, it is recommended to use the dedicated SPI interface, because the speed of using the universal I/O analog SPI is not fast.
Method 1: Using a MAX232 chip on the MCU board to connect the serial port on the board with the rxd and txd on the MCU, and then using a usb to serial cable to connect the pc and the serial port on the MCU board. Method 2: Find a conversion line with a usb port at one end and a vcc, ground, rxd, txd at the other end to connect the pc directly with the MCU.
EMC certification is based on product rcio wireless charging Electromagnetic compatibility standards and corresponding technical requirements rcio wireless charging , through the certification body testing and confirmation, and through the issuance of certification certificates and certification marks to prove that a product meets the corresponding standards and technical requirements. China's EMC certification has been included in the 3C certification scope.
Oil rc is energy saving certified. There are currently three types of certification standards for oil, the common API certification standard, the higher level ACEA certification standard, and the ILSACGF certification standard. In the oil certification of this piece, there is A saying called layman see API certification, experts look at the Oems supporting. Because the API standard entered the Chinese market earlier, it is very well-known among consumers.
The IO of PLC is Input/Output, which is divided into two parts: IO device and IO interface. The
register participates in the operation and stores the intermediate result of the operation, which also works under the command of the controller. CPU speed and memory capacity are important parameters of PLC, which determine the working speed of PLC, the number of IO and the software capacity, so the control scale is limited. 4I/O module PThe interface between the LC and the electrical circuit is completed through the input/output part (I/O).
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3, EMC certification is based on the product's electromagnetic compatibility standards and corresponding technical requirements, through the certification body test confirmation, and through the issuance of certification certificates and certification marks to prove that a product meets the corresponding standards and technical requirements. The EMC of our country recognizes