W65C21S adapter equivalent, peripheral interface adapter.
The Western Design Center W65C21S 3
The Western Design Center, Inc.
W65C21S Data Sheet
www.DataSheet4U.com
Figure 3. W65C21S PIA Block Diagram
D0-D7 PHI2 RWB RS0 RS1 .
The WDC W65C21S is a very flexible Peripheral Interface Adapter (PIA) for use with WDC’s 65xx and other 8-bit microprocessor families. The W65C21S provides programmed microprocessor control of up to two peripheral devices (Port A and Port B). Periphe.
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