NT6868A - Novatek

NT6868A Keyboard Controller

NT6868A is a single chip micro-controller for keyboard applications. It incorporates a 6502 8-bit CPU core, 4K bytes of ROM, and 128 bytes of RAM used as working RAM and stack area. It also includes 29 programmable bi-directional I/O pins and one 8-bit pre-loadable base timer. Additionally, it includes a built-in low voltage reset, a 4MHz RC oscillator tha.

Features

n Built-in 6502 8-bit CPU n 2 MHz CPU operation frequency n 4K bytes of ROM n 128 bytes of SRAM n One 8-bit programmable base timer with 1 - 256 µsec interval n 29 programmable bi-directional I/O pins n 3 LED direct sink pins with internal serial resistors n Mask optional for built-in RC oscillator with an external resistor or external ceramic resonator applied n Watch-dog timer n Built-in power-on reset n Built-in low voltage reset n CMOS technology for low power consumption n Available in 40 pin DIP package and 40 pad CHIP FORM General Description NT6868A is a single chip micro-controller.