Datasheet Summary
<DUMC
;========= UM6521 / UM6521A Peripheral Interface Adapter(PIA)
Features
- Extended performance version of UM6520
- Single +5V power supply
- Two 8-bit bi-directional I/O ports with individual data direction control
- CMOS-patible peripheral port A lines
- Automatic "handshake" control of data transfers
- Programmable interrupt capability
- Automatic initialization on power up
- 1 and 2 MHz versions
- Direct replacement for Motorola MC6821
General Descr~ption
The UM6521/A Peripheral Interface Adapter (PIA) is designed to provide a broad range of peripheral control to microputer systems. It is functionally patible with the UM6520, but with more drive capability and improved...