HT82M21A controller equivalent, 3-key 3d usb+ps/2 optical mouse controller.
* Operating voltage: 4.4V~5.25V
* Complete Universal Serial Bus specs V1.1
* Serial Bus Interface Engine (SIE)
* USB transceiver
* Microsoft 3D Intel.
The HT82M21A can support the USB Standard Request as well as HID Class Request version 1.1. It is compatible with Micro.
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