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 The Western Design Center, Inc. 
Part Number : W65C21S
Overview :
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). Peripheral device control is accomplished through two 8-bit bidirectional I/O Ports, with individually designed Data Direction Registers.
Features : - Low Power CMOS N-well silicon gate technology
- High speed/Low power replacement for Motorola/Rockwell/AMI/MOS Technology/MOSTEK/HITACHI/ ST Microelectronics/GTE/CMD 6520, 6521, 6820, 6821 PIA’s
- Two 8-bit bidirectional I/O ports with individual data direction control.
- Automatic “Handshake” control of data transfers
- Two interrupts (one for each port) with program control
- Static to 14MHz operation, with high speed Port A, CA2 outputs.
Categories :
Portability :
Type : Soft



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