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WorksheetsMPMC Unit 1A
Total questions: 20
Worksheet time: 20mins
8085 is a --- bit processor
4 bit
8 bit
12 bit
16 bit
The data bus of 8085 is __ bits long.
4 bits
8 bits
12 bits
16 bits
The address bus of 8085 is __ bits long
4 bits
8 bits
12 bits
16 bits
8085 chip has __ pins.
28
36
40
48
8085 microprocessor does not contain which of the following?
Memory
ALU
Register array
Timing and control unit
ALU is used for doing __ processing.
Arithmetic
Logical
Both arithmetic and logical
Subroutine
Which of the following is not a 8 bit register?
'A' register
'C; register
Stack pointer
'H' register
Which of the following is not a 16 bit register?
Program counter
Stack pointer
'HL' register pair
'D' register
Program counter contains the
starting address of the memory
address of the next instruction
address of the first instruction of subroutine
Return address from subroutine
Stack pointer in 8085 is a
16 bit special register
Points to a RAM area in memory known as stack.
points to the 16 bit return address on top of the stack
All of the above
8085 processor runs at a clock frequency of about
1 MHZ
3 MHz
5 MHz
20 MHz
Which of the following is not an 8085 interrupt?
INTA
INTR
TRAP
RST 7.5
How many memory locations are possible in 8085?
8
16
256
65536
Which of the following is not a status flag in 8085?
Zero
Unity
Parity
Carry
Which register pair in 8085 is used a memory data pointer?
B,C
D,E
A,B
H,L
Which of the following is a temporary register used by 8085 for its internal use?
W
Z
Both W and Z
T
A crystal oscillator is be connected to which two pins of an 8085?
1 and 2
3 and 4
21 and 22
39 and 40
RESET input to the microprocessor
Resets the microprocessor
Sets program counter to zero
Tristates the buses
All of the above
The processor goes in to a ____ state when a READY signal is made low by the memory
HOLD
INTA
WAIT
INTR
Auxiliary carry bit is 1 when there is a carry from the
d3 to d4 bit
d4 to d5 bit
d5 to d6 bit
d0 to d1 bit
