[simonh]

Can you describe to me the architecture and components of a typical keyboard USB interface chip, both internal to the chip and external?

[aswanson]

Sure. Behold the power of hypertext: http://www.sprintek.com/en/products/keyboard_ic/SK5100.aspx

[simonh]

The whole point of this thread is discussing how engineers used to keep the entire design of the system in their heads, even the CPU. Being able to point to a repository of tech specs really isn't the same thing.