MICROPROCESSOR AND MICROCONTROLLER

INTERRUPT PROGRAMMING

ARCHITECTURE OF 8085

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The ____ is a maskable interrupt because the microprocessor will be interrupted only if interrupts are enabled using set interrupt flag instruction.
A
INTR
B
NMI
C
RST
D
INT
Explanation: 

Detailed explanation-1: -Explanation: The INTR signal can be masked by resetting the interrupt flag.

Detailed explanation-2: -A non-maskable is an interrupt which can not be disabled. RST 7.5, RST 5.5 are maskable interrupts but TRAP is a non-maskable interrupt.

Detailed explanation-3: -The 8086 has two hardware interrupt pins, i.e. NMI and INTR. NMI is a non-maskable interrupt and INTR is a maskable interrupt having lower priority. One more interrupt pin associated is INTA called interrupt acknowledge.

There is 1 question to complete.