6525 - Commodore

6525 TRI-PORT INTERFACE

v -'-'commodore aamicanduct;or group ~~@@ 6525 TRI·PORT INTERFACE MPS 6525 TRI-PORT INTERFACE CONCEPT ... The 6525 TRI·PORT Interface (TPI) is designed to simplify the implementation of complex I/O operations in microcomputer systems. It combines two dedicated a·bit 110 ports with a third a-bit port programmable for either normal 110 operation or priority .

Features

• 24 individually programmable 110 lines or 16 110 lines, 2 handshake lines and 5 interrupt inputs.
• Priority or non-priority interrupts
• Automatic handshaking
• Completely static operation
• Two TTL Drive Capabi Iity
• a directly addressable registers
• 1 MHz, 2MHz and 3MHz operation 6525 REGISTERS
·000 001 010 011 100 101 110 111 RO PRA - Port Register A R1 PRB - Port Register B R2 PRC - Port Register C R3 DDR.