doi:US4819158 ATakumi MiyashitaUSUS4819158 * May 30, 1985 Apr 4, 1989 Fujitsu Limited Microprocessor with an interruptable bus cycle
interrupt.12This happens for an interrupt at First Clock, while a reset can happen any time in the instruction cycle. A trap goes to theINT1microcode routine described earlier, while an NMI interrupt goes toINT2microcode routine. The microcode for theINTRinterrupt will be discussed in the ...
In the interrupt acknowledge cycle, the processor asserts the INTA (interrupt acknowledge) line to the PIC, expecting an interrupt vector number. 5. The PIC drives the interrupt vector number associated with device A to the system bus. 6. The PIC then deasserts the INT line (so that a new...
programcalledtheinterruptserviceroutine.Afterprovidingservicetoaninterrupt,theCPUmustresumenormalprogramexecution.Thecompleteinterruptservicecycleisasfollows:(1)Savetheprogramcountervaluewhenaninterruptoccurs.(2)SavetheCPUstatusinthestack.(3)Identifythecauseoftheinterrupt.(4)Resolvethestartingaddressofthecorresponding...
CONSTITUTION: While an interrupt cycle is progressed automatically in a microprocessor(10), an interrupt control unit(22) transmits an interrupt confirmation signal necessary for terminating the interrupt cycle with respect to an interrupt requesting signal of the peripheral element to a peripheral ...
In the interrupt acknowledge cycle, the processor asserts the INTA (interrupt acknowledge) line to the PIC, expecting an interrupt vector number. 5. The PIC drives the interrupt vector number associated with device A to the system bus. 6. The PIC then deasserts the INT line (so that a new...
But there's jitter in the delay between when the interrupt is triggered (the solid 70 kHz square wave) and when the function within the interrupt is executed. This isn't terrible, but results in a jittery cycle about one out of every thousand or so cycles.I've tried using higher ...
Interrupt circuitry is provided for an MOS integrated circuit microprocessor chip. An input of the microprocessor chip is adapted to having an external interrupt signal applied thereto for interruptin
When an interrupt request signal is input, a microprocessor checks, upon termination of an instruction cycle being executed, whether the interrupt request is masked. If the interrupt request is not masked, the microprocessor saves the content of the program counter and the processor status register ...
a control part designed to control the motion of respective parts of the mail box module; and a microprocessor changing and identifying the mail box interrupt address stored in a mail box module, thus to effect an interrupt identifying cycle at an interrupt state and branch to interrupt a proce...