Versatile Interface Adapter (via)

The W65C22S Versatile Interface Adapter (VIA) is a flexible I/O device for use with the W65C series Microprocessor family. The W65C22S 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 line basis. Also provided are two programmable 16-bit Interval Timer Counters with Latches Timer 1 may be operated in a One-Shot Interrupt Mode with interrupts on each count-to-zero, or in a Free-Run Mode with a continuous series of evenly spaced interrupts. Timer 2 functions as both an interval and pulse Counter Serial Data transfers are provided by a serial-to-parallel/parallel-to-serial Shift register Application versatility is further increased by various control Registers including an Interrupt Flag Register an Interrupt Enable Register and two Function Control Registers The IRQB output is an open drain. By Unkown
W65C22S 's PackagesW65C22S 's pdf datasheet

W65C22S Pinout, Pinouts
W65C22S pinout,Pin out
This is one package pinout of W65C22S,If you need more pinouts please download W65C22S's pdf datasheet.

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