Ch376s U Disk Sd Card Read-write Modules Usb Flash Disk Spi

US $15.56

  • Shenzhen, China
  • Jan 29th
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It is strongly recommended that shorten the related to the length of the lead, in order to reduce interference. --Capacitor C4 for decoupling internal power source node to reduce the EMI of USB transmission, capacity of 4700 to 0.1 uF, pf can choose ordinary 103 patch 0.01 uF capacitance. --P4 is a USB port, can be used for both USB HOST HOST, can also be used for USB DEVICE equipment, resistor R1 used to limit the output current to external USB DEVICE, avoid when just inserted U disk, USB equipment cause the loss of power supply voltage of the short time, and even cause CH376 or microcontroller abnormal reset or internal RAM data error. If it is a USB drive, you should to replace resistor R1 with dc resistance smaller inductance, or alternatively use a set of 5 v power supply directly provide greater working current (more than 500 ma) for external hard drive. In addition, the USB HOST socket of the power supply decoupling capacitors C9 capacity is too small, capacity is big, should be greater than 100 mu F) can reduce the USB device just insert the power supply voltage fluctuations. --P5 is SD card socket, can contact with standard size SD card, other specifications of the SD card can be converted into a need to add. Resistance R3 used to limit the output to external SD card of current, while just insert SD card to avoid power supply voltage drop of a short time. --P1 is a sign of 8 bits parallel ports, used to connect to MCU parallel port, parallel port of the necessary signals including D0 - D7, A0, RD#, WR#, CS# and GND, and INT# is optional. --P2 is the SPI serial port signal, used to connect to MCU SPI interface, the necessary signals including SCS, SCK SPI, SDI, SDO and GND, and INT# is optional. --P3 is asynchronous serial port signal, used to connect to MCU asynchronous serial port, asynchronous serial port needed signal including RXD, TXD and GND, and INT# is optional. P3 provides the SD card at the same time write protect SDWP and plug state SDINSERT signal lines. --J3 is used to select CH376 chips working voltage, short after 1 to 2 feet for 5 V voltage, short after 2 to 3 feet when voltage of 3.3 V. Defaults to 5 V voltage, when the working voltage of the single chip microcomputer is equal to or less than 3.3 V, can choose to CH376 3.3 V voltage. When the working voltage of 5 V CH376 chips, J2 must disconnect, when the working voltage of 3.3 V CH376 chip, J2 must be short. --J1, J5 and J6 used in electric or hardware reset after select CH376 with single chip microcomputer communication interface: If the J1 nipple, J5 disconnect, J6 disconnect, so is the 8-bit parallel; If the J1 disconnect, J5 short sub, J6 is short, so is the SPI interface; If the J1 disconnect, J5 disconnect, J6 disconnect, then is asynchronous serial port. --Some example applications may use single chip microcomputer serial port debug output state information, if need to display the monitoring information, can be controlled by the serial port after RS232 level switch connected to the computer using a serial port monitor/debugging tool software view. If use CH375 evaluation board, J2 can be connected to the computer serial port; If the computer without a serial port or serial port has been occupied by other devices, so can provide the simulation from the USB to serial interface chip CH341 serial port. --CH375 evaluation board inside device in 5 V power supply voltage, the resistance must be combined with R0 and remove 3.3 V voltage regulator D4, when work at 3.3 V power supply voltage, must add stabilizer R0 D4 and remove the resistance. Default is 5 v power supply. Wholesale to save you more money / click here!   $44.10 $12.80 $27.28 $169.00 New Shield V03 Module 4PCS 50W High Power LED 10pcs TowerPro micro servo motor SG90 10pcs ATmega2560-16AU Board $12.69 $26.49 $24.07 $25.55 433Mhz RF transmitter and receiver kit 10PCS Infrared Wireless Remote 5pcs 4 Channels 5V Relay Module 5pcs 2.4G NRF24L01+ Wireless Module     Hot Category in our shop! 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