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- WDC_65C22 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.".
- WDC_65C22 thumbnail W65C22S6TPG-14_lg.jpg?width=300.
- WDC_65C22 wikiPageExternalLink w65c22s.pdf.
- WDC_65C22 wikiPageID "3995253".
- WDC_65C22 wikiPageLength "3697".
- WDC_65C22 wikiPageOutDegree "29".
- WDC_65C22 wikiPageRevisionID "690619990".
- WDC_65C22 wikiPageWikiLink O_Chips.
- WDC_65C22 wikiPageWikiLink Chip_carrier.
- WDC_65C22 wikiPageWikiLink Dual_in-line_package.
- WDC_65C22 wikiPageWikiLink Hertz.
- WDC_65C22 wikiPageWikiLink output.
- WDC_65C22 wikiPageWikiLink Interface_(computing).
- WDC_65C22 wikiPageWikiLink Interrupt.
- WDC_65C22 wikiPageWikiLink Interrupt_latency.
- WDC_65C22 wikiPageWikiLink Interrupts_in_65xx_processors.
- WDC_65C22 wikiPageWikiLink MOS_Technology.
- WDC_65C22 wikiPageWikiLink MOS_Technology_6522.
- WDC_65C22 wikiPageWikiLink MOS_Technology_65xx.
- WDC_65C22 wikiPageWikiLink O.
- WDC_65C22 wikiPageWikiLink Open_collector.
- WDC_65C22 wikiPageWikiLink Peripheral.
- WDC_65C22 wikiPageWikiLink Power_supply.
- WDC_65C22 wikiPageWikiLink Programmable_interval_timer.
- WDC_65C22 wikiPageWikiLink Pulse_(signal_processing).
- WDC_65C22 wikiPageWikiLink Push–pull_output.
- WDC_65C22 wikiPageWikiLink Resistor.
- WDC_65C22 wikiPageWikiLink 65802.
- WDC_65C22 wikiPageWikiLink WDC_65C02.
- WDC_65C22 wikiPageWikiLink Western_Design_Center.
- WDC_65C22 wikiPageWikiLink Wired_logic_connection.
- WDC_65C22 wikiPageWikiLink File:W65C22S6TPG-14_lg.jpg.
- WDC_65C22 wikiPageWikiLinkText "W65C22N".
- WDC_65C22 wikiPageWikiLinkText "W65C22S".
- WDC_65C22 wikiPageUsesTemplate Template:Notability.
- WDC_65C22 wikiPageUsesTemplate Template:Unreferenced.
- WDC_65C22 subject O_Chips.
- WDC_65C22 hypernym Device.
- WDC_65C22 type Device.
- WDC_65C22 type Datum.
- WDC_65C22 type Peripheral.
- WDC_65C22 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.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.".
- WDC_65C22 label "WDC 65C22".
- WDC_65C22 sameAs Q7948331.
- WDC_65C22 sameAs m.0bbm6q.
- WDC_65C22 sameAs Q7948331.
- WDC_65C22 wasDerivedFrom WDC_65C22?oldid=690619990.
- WDC_65C22 depiction W65C22S6TPG-14_lg.jpg.
- WDC_65C22 isPrimaryTopicOf WDC_65C22.