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The 6526 Complex Interface Adapter (CIA) is a 65xx bus compatible peripheral interface device with extremely flexible timing and I/O capabilities.
FEATURES
· 16 Individually programmable I/O lines
· 8 or 16-Bit handshaking on read or write
· 2 independent, linkable 16-bit interval timers
· 24-hour (AM/PM) time of day clock with programmable alarm · 8-Bit shift register for serial I/O
· 2TTL Load capability
· CMOS compatible I/O lines
· 1 or 2 MHz operation available
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Documentation