GATE ECE
Microprocessors
Pin Details of 8085 and Interfacing with 8085
Previous Years Questions

Marks 1

In the circuit shown, the device connected to Y5 can have address in the range ...
In the circuit shown, the device connected to Y5 can have address in the range ...
In the 8085 microprocessor, the RST6 instruction transfers the program execution to the following location
The number of hardware interrupts (which require an external signal to interrupt) present in an 8085 microprocessor are
If $$CS\;=\overline{A_{15}}\;A_{14}\;A_{13}$$ is used as the chip select logic of a 4K RAM in an 8085 system, then its memory range will be
An I/O processor control the flow of information between
In an 8085$$\mu$$P system, the RST instruction will cause an interrupt
The decoding circuit shown below has been used to generate the active low chip select signal for a microprocessor peripheral. (The address lines are d...
In a microprocessor, when a CPU is interrupted, it
In a microcomputer, wait states are used to
In an 8085 microprocessor system with memory mapped I/O,
For a microprocessor system using I/O-mapped I/O the following statement(s) is NOT true
A microprocessor with a 16-bit address bus is used in a linear memory selection configuration (i.e. Address bus lines are directly used as chip select...
A 8bit $$\mu $$p has 16bit address bus. A 1KB memory chip is interfaced to processor as shown ib figure. The address range for the chip is __________...

Marks 2

An 8 Kbyte ROM with an active low Chip Select input CS is to be used in an 8085 microprocessor based system. The ROM should occupy the address range 1...
For the 8085 microprocessor, the interfacing circuit to input 8-bit digital data (DI0 – DI7) from an external device is shown in the figure. The instr...
There are four chips each of 1024 bytes connected to a 16 bit address bus as shown in the figure below. RAMs 1,2,3 and 4 respectively are mapped to ad...
An I/O peripheral device shown in figure (b) below is to be interfaced to an 8085 microprocessor. To select the I/O device in the I/O address range D4...
What memory address range is NOT represented by chip 1 and chip 2 in figure? A0 to A15 in this figure are the address lines and CS means Chip Select. ...
The 8255 Programmable Peripheral Interface is used as described below. I. An A/D converter is interfaced to a microprocessor through an 8255. the conv...
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
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