NT6880
Keyboard Controller
Features
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Built-in 6502 8-bit CPU 2 MHz CPU operation frequency 5K bytes of ROM 160 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
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Mask optional for built-in RC oscillator with an external resistor or external c...
