8085 MICROPROCESSOR
ARCHITECTURE OF 8085
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
RST7.5, RST 5.5, RST 6.5, Trap, INTR
|
|
|
RST 4.5, RST 6.5, RST 6
|
|
|
INTR, INTA, RST 7.5,
|
|
|
None of the above
|
Detailed explanation-1: -There are 8 software interrupts in 8085, i.e. RST0, RST1, RST2, RST3, RST4, RST5, RST6, and RST7. Hardware interrupt − There are 5 interrupt pins in 8085 used as hardware interrupts, i.e. TRAP, RST7.5, RST6.5, RST5.5, INTA.
Detailed explanation-2: -There are 5 Hardware Interrupts in 8085 microprocessor. They are – INTR, RST 7.5, RST 6.5, RST 5.5, TRAP. Software Interrupts are those which are inserted in between the program which means these are mnemonics of microprocessor.
Detailed explanation-3: -RST 6.5 is the TRAP interrupt in the context 8085 microprocessor, it describes as none maskable interrupt. Interrupt is a mechanism by which input/output or an instruction can temporarily suspended the normal execution of processor and jump to a subrountine program.
Detailed explanation-4: -A vectored-interrupt in 8085 is a TRAP. The starting address of 8085 is known by itself the of the ISS as 4.5 * 8 = 0024H. Hence we name the TRAP pin equivalently as RST 4.5. It is referred as trap by INTEL.
Detailed explanation-5: -TRAP : It is a non-maskable, edge and level-triggered interrupt. It is unaffected by any mask or interrupt enable. RST 7.5 : It is a maskable, edge-triggered interrupt request input line. RST 6.5 and RST 5.5 : These are level-triggered, maskable interrupt request input lines. INTR :