You could emulate a keyboard, and have the Bluetooth/USB stacks implemented in dedicated chips, with a 1-way serial connection from the main MCU. But it's pret

You could emulate a keyboard, and have the Bluetooth/USB stacks implemented in dedicated chips, with a 1-way serial connection from the main MCU. But it's pretty nice to be able to hit a keyboard shortcut and have it figure out which password to fill rather than scrolling through a list. It would be pain to enter all the site names without management software too. As always, convenience vs security.