About: WDC 65C22

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The W65C22 versatile interface adapter (VIA) is an input/output device for use with the 65xx series microprocessor family. Designed by the Western Design Center, the W65C22 is made in two versions, both of which are rated for 14 megahertz operation, and available in DIP-40 or PLCC-44 packages.

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rdf:type	yago:Bit109222051 yago:Fragment109285254 yago:Part109385911 yago:PhysicalEntity100001930 yago:WikicatI/OChips device yago:Thing100002452
rdfs:label	WDC 65C22 (en)
rdfs:comment	The W65C22 versatile interface adapter (VIA) is an input/output device for use with the 65xx series microprocessor family. Designed by the Western Design Center, the W65C22 is made in two versions, both of which are rated for 14 megahertz operation, and available in DIP-40 or PLCC-44 packages. (en)
foaf:depiction
dcterms:subject	Input/output integrated circuits
Wikipage page ID	3995253 (xsd:integer)
Wikipage revision ID	975718880 (xsd:integer)
Link from a Wikipage to another Wikipage	Push–pull output MOS Technology 6522 MOS Technology 65xx Interrupt latency Input/output integrated circuits Megahertz MOS Technology Programmable interval timer Western Design Center Dual in-line package Power supply Pulse (signal processing) Resistor Interrupt Interrupts in 65xx processors Plastic leaded chip carrier Peripheral Wired-OR I/O Port I/O device Open-drain Interface (computer science) W65C02S W65C816S
Link from a Wikipage to an external page	http://www.westerndesigncenter.com/wdc/documentation/w65c22.pdf
sameAs	WDC 65C22 WDC 65C22 WDC 65C22 WDC 65C22
dbp:wikiPageUsesTemplate	dbt:Mono dbt:Multiple_issues dbt:Notability dbt:Refimprove dbt:Reflist dbt:MOS_CPU
thumbnail	wiki-commons:Special:FilePath/W65C22S6TPG-14_lg.jpg?width=300
has abstract	The W65C22 versatile interface adapter (VIA) is an input/output device for use with the 65xx series microprocessor family. Designed by the Western Design Center, the W65C22 is made in two versions, both of which are rated for 14 megahertz operation, and available in DIP-40 or PLCC-44 packages. * W65C22N: This device is fully compatible with the NMOS 6522 produced by MOS Technology and others, and includes current-limiting resistors on its output lines. The W65C22N has an open-drain interrupt output (the IRQB pin) that is compatible with a wired-OR interrupt circuit. Hence the DIP-40 version is a "drop-in" replacement for the NMOS part. * W65C22S: This device is fully software– and partially hardware–compatible with the NMOS part. The W65C22S' IRQB output is a totem pole configuration, and thus cannot be directly connected to a wired-OR interrupt circuit. As with the NMOS 6522, the W65C22 includes functions for programmed control of two peripheral ports (ports A and B). Two program–controlled 8-bit bi-directional peripheral I/O ports allow direct interfacing between the microprocessor and selected peripheral units. Each port has input data latching capability. Two programmable data direction registers (A and B) allow selection of data direction (input or output) on an individual I/O line basis. Also provided are two programmable 16-bit interval timer/counters with latches. Timer 1 may be operated in a one-shot or free-run mode. In either mode, a timer can generate an interrupt when it has counted down to zero. Timer 2 functions as an interval counter or a pulse counter. If operating as an interval counter, timer 2 is driven by the microprocessor's Ø2 clock source. As a pulse counter, timer 2 is triggered by an external pulse source on the chip's PB6 line. Serial data transfers are provided by a serial to parallel/parallel to serial shift register, with bit transfers synchronized with the Ø2 clock. Application versatility is further increased by various control registers, including an interrupt flag register, an interrupt enable register and two Function Control Registers. (en)
gold:hypernym	Device
prov:wasDerivedFrom	wikipedia-en:WDC_65C22?oldid=975718880&ns=0
page length (characters) of wiki page	3884 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:WDC_65C22
is Link from a Wikipage to another Wikipage of	MOS Technology 6522 Western Design Center
is foaf:primaryTopic of	wikipedia-en:WDC_65C22

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