CH341A convert equivalent, usb bus convert.
2.1.Introduction
* Full speed USB device interface, conforms to USB Specification Version 2.0, only needs crystal and capacitance external.
* Optional: define Ven.
Positive power input port, requires an 0.1uF power decoupling capacitance Public ground, ground connection for USB bus Attachment of VCC input external power while 3.3V;connects of 0.01uF decoupling capacitance outside while 5V Input of crystal oscil.
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