NT6868A
Overview
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.
- Built-in 6502 8-bit CPU
- 2 MHz CPU operation frequency
- 4K bytes of ROM
- 128 bytes of SRAM
- One 8-bit programmable base timer with 1 - 256 µsec interval
- 29 programmable bi-directional I/O pins
- 3 LED direct sink pins with internal serial resistors
- Mask optional for built-in RC oscillator with an external resistor or external ceramic resonator applied
- Watch-dog timer
- Built-in power-on reset
