PDF 6525 Data sheet ( Hoja de datos )

Número de pieza	6525
Descripción	TRI-PORT INTERFACE
Fabricantes	Commodore
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No Preview Available ! 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 interrupt/handshaking control. Depending on the mode selected, the 6525 can provide 24 individually programmable 110 lines or 16 110 lines, 2 handshake lines and 5 priority interrupt inputs. FEATURES: • 24 individually programmable 110 lines or 16 110 lines, 2 handshake lines and 5 in- terrupt 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 DDRA - Data Qirection Register A R4 DDRB - Data Direction Register B R5 DDRC - Data Qirection Register C R6 CR-Control Register R7 AIR-Active Interrupt Register -NOTE: RS2. RS1, RSO respectively ORDER NUMBER: MXSM25 T L SPEED RANGE =NO SUFFIX 450 ns A=225 ns B = 155 ns PACKAGE DESIGNATOR C=CERAMIC P=PLASTIC 2-76 6525 PIN CONFIGURATION Vss PAO PA1 PA2 PA3 PA4 PAS PA6 PA7 PBO PB1 PB2 PB3 PB4 PBS PB6 PB7 cs R/W VDD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 DB7 39 DBB 38 DB5 37 DB4 36 DB3 35 DB2 34 DB1 33 DBO 32 PC7 31 PC6 30 PC5 29 PC4 26 PC3 27 PC2 26 PC1 25, pco 24 RSO 23 RS1 22' RS2 21 REs 1 page MPS 6525 READ CYCLE TIMING Symbol TRC TACC TCO TACS TACH TRCS TRCH TOTO TPDS TPDH Characteristic Read Cycle Access Time1 CS to Output Valid RS to CS Set Up RS to CS Hold R/WhightoCSSetUp R/W high to CS Hold CS to Output off Delay Port Input Set Up Port Input Hold 6525 MIN MAX 450 450 270 0 0 0 0 20 120 120 150 6525A MIN MAX 225 225 120 0 0 0 0 20 120 60 150 65258 MIN MAX 165 155 70 0 0 0 0 20 100 40 150 UNITS ns ns ns ns ns ns ns ns ns ns NOTE 1 - Access time measured from later of R/W high or RS stable. WRITE CYCLE TIMING Symbol TWC TACS TACH TWCS TWCH TDS TDH TCPD TCSp Characteristic Write Cycle RS to CS Set Up RS to CS Hold R/W low to CS Set Up R/W low to CS Hold Data Bus to CS Set Up Data Bus to CS Hold C§ to Port Out Delay CS Pulse Width 6525 MIN MAX 450 0 0 0 0 150 0 1000 420 6525A MIN MAX 225 0 0 0 0 100 0 500 200 65258 MIN MAX 165 0 0 0 0 50 0 330 150 UNITS ns ns ns ns ns ns ns ns ns 2-80 5 Page

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PDF Descargar	[ Datasheet 6525.PDF ]

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