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UMC - Peripheral Interface Adapter

Numéro de référence UM6520
Description Peripheral Interface Adapter
Fabricant UMC 
Logo UMC 





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UM6520 fiche technique
(l)UMC
UM6520 / UM6520A
Peripherald",',,""''"'"''''''''.''''' Interface Adapte,(PIA)
Features
• Direct replacement for Motorola MC6820
• Single +5V power supply
• Two 8-bit bi-directional I/O ports with individual data
direction control
• CMOS-compatible peripheral port A lines
• Automatic "handshake.' control of data transfers
• Programmable interrupt capability
• Automatic initialization on power up
• 1 and 2 MHz versions
General Description
The UM6520/A peripheral Interface Adapter (PIA) is
designed to provide a broad range of peripheral control to
microcomputer systems. Control of peripheral devices is
accomplished through two 8-bit bi-directional I/O ports.
Each I/O line may be programmed to be either an input
or an output. In addition, four peripheral control lines
are provided to perform "handshaking" during data
transfers.
Pin Configuration
Block Diagram
VSS
PAO
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PBO
PB1
PB2
PB3
PB4
PB5
PB6
PB7
CB1
CB2
VCC
CA1
CA2
IROA
IROB
RSO
RS1
RES
DO
01
02
03
04
05
06
07
r/J2
CS1
CS2
CSO
RlW
MICRO-
PROCESSORS
UM650X
1881T
DATA BUS
CONTROL
UM6520!
6520A
CONTROL
8-BIT
DATA PORT
8-BIT
DATA PORT
PERIPHERAL
DEVICES-
PRINTERS,
DISPLAYS, ETC.
CONTROL
7-41

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