NT6881 Datasheet (ETC) - USB Keyboard Micro-Controller

NT6881, USB Keyboard Micro-Controller

The NT6881 is a single chip micro-controller for USB keyboard applications.

It incorporates a 6502 8-bit CPU core, 6K bytes of mask ROM, and 256 bytes of RAM used as working RAM and stack area.

It also includes 29 programmable bi-directional I/O pins with built-in resistors, and one 8-bit pre-loadab

NT6881 Features

* n Built-in 6502 8-bit CPU n 3 MHz CPU operation frequency when oscillator is running at 6 MHz n 6K bytes of ROM n 256 bytes of SRAM n One 8-bit programmable base timer with pre-divider circuit n 29 programmable bi-directional I/O pins including two external interrupts n n n n n n n n n 3 LED direct