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WDC 65C21

The W65C21S is a very flexible Peripheral Interface Adapter (PIA) for use with WDC's 65xx and other 8-bit microprocessor families. It is produced by Western Design Center (WDC).

Features of the W65C21S
• 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 14 MHz operation, with high speed Port A, CA2 outputs. • Industrial temperature range • 40 Pin Plastic Dip and 44 Pin Plastic PLCC versions • 5 volt ± 10% supply requirements • Compatible with the 65xx and 68xx family of microprocessors ==External links==
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