1
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
The 8255 Programmable Peripheral Interface is used as described below.
I. An A/D converter is interfaced to a microprocessor through an 8255. the conversion is initiated by a signal from the 8255 on Port C. A signal on Port C causes data to be strobed into Port A.
II. Two computers exchange data using a pair of 8255s. Port A works as a bidirectional data port supported by appropriate handshaking signals.
The appropriate modes of operation of the 8255 for I and II would be2
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
An 8085 microprocessor based system uses a 4K × 8-bit RAM whose starting
address is AA00H. The address of the last byte in this RAM is
Questions Asked from Marks 2
GATE ECE Subjects
Signals and Systems
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics