Table of Contents
- 1 What happened when the intr signal goes high in 8085?
- 2 What is the use of intr pin?
- 3 What is intr interrupt?
- 4 What happens intr?
- 5 What happens when a high is applied to reset pin?
- 6 Which pin has highest priority?
- 7 How is the intr interrupt used in 8085?
- 8 How long can the intr signal stay high?
- 9 What is the pin diagram of 8086 microprocessor?
- 10 What is the difference between INTR and NMI interrupt pins?
What happened when the intr signal goes high in 8085?
When the INTR signal is high, then the microprocessor completes its current instruction and sends active low interrupt acknowledge signal. When instructions are received, then the microprocessor saves the address of the next instruction on stack and executes the received instruction.
What is the use of intr pin?
INTR : Interrupt Request. This is triggered input. This is sampled during the last clock cycles of each instruction for determining the availability of the request. If any interrupt request is found pending, the processor enters the interrupt acknowledge cycle.
Which interrupt has the highest priority in 8086?
NMI
(A) NMI (Non Maskable Interrupt) – It is a single pin non maskable hardware interrupt which cannot be disabled. It is the highest priority interrupt in 8086 microprocessor.
What is intr interrupt?
The INTR is a maskable interrupt because the microprocessor will be interrupted only if interrupts are enabled using set interrupt flag instruction. It should not be enabled using clear interrupt Flag instruction. The INTR interrupt is activated by an I/O port.
What happens intr?
– Till an instruction is completed the signal of INTR will remain high. Once an instruction is completed the processor sends an acknowledgement signal INTA. – As soon as the INTA signal goes low a new opcode is placed on the data bus for transfer.
Which interrupt has the highest priority a intr B trap C RST6 5?
Discussion Forum
| Que. | Which interrupt has the highest priority? |
|---|---|
| b. | TRAP |
| c. | RST6.5 |
| d. | RST6.6 |
| Answer:RST6.5 |
What happens when a high is applied to reset pin?
When it is high, it indicates that the device is ready to transfer data. When it is low, it indicates wait state. It is available at pin 21 and is used to restart the execution. It causes the processor to immediately terminate its present activity.
Which pin has highest priority?
Explanation: The Non-Maskable Interrupt input pin has the highest priority among all the external interrupts. Explanation: TRAP is the internal interrupt that has highest priority among all the interrupts except the Divide By Zero (Type 0) exception.
Which interrupt has highest priority?
TRAP
4.6
| Interrupt | Priority | Mask |
|---|---|---|
| TRAP (RST 4.5) | 1 (Highest) | Non-maskable |
| RST 7.5 | 2 | Maskable |
| RST 6.5 | 3 | Maskable |
| RST 5.5 | 4 | Maskable |
How is the intr interrupt used in 8085?
The interrupting device gives the address of sub-routine for these interrupts. INTR is the only non-vectored interrupt in 8085 microprocessor. Maskable Interrupts are those which can be disabled or ignored by the microprocessor. These interrupts are either edge-triggered or level-triggered, so they can be disabled.
How long can the intr signal stay high?
How many interrupt pins are there in 8086?
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.
What is the pin diagram of 8086 microprocessor?
Pin diagram of 8086 microprocessor is as given below: Intel 8086 is a 16-bit HMOS microprocessor. It is available in 40 pin DIP chip. It uses a 5V DC supply for its operation. The 8086 uses 20-line address bus. It has a 16-line data bus. The 20 lines of the address bus operate in multiplexed mode.
What is the difference between INTR and NMI interrupt pins?
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.
What is NMI interrupt in 8086 microprocessor?
(A) NMI (Non Maskable Interrupt) – It is a single pin non maskable hardware interrupt which cannot be disabled. It is the highest priority interrupt in 8086 microprocessor. After its execution, this interrupt generates a TYPE 2 interrupt. IP is loaded from word location 00008 H and CS is loaded from the word location 0000A H.