參數(shù)資料
型號: UPD17226MC
廠商: NEC Corp.
元件分類: 4位微控制器
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述: 4位單片機的小型通用紅外遙控器
文件頁數(shù): 45/84頁
文件大小: 393K
代理商: UPD17226MC
μ
PD17225, 17226, 17227, 17228
45
Data Sheet U12643EJ2V0DS00
7.3.2
Returning from interrupt processing routine
To return from an interrupt processing routine, use the RETI instruction.
Then the following processing is executed within an instruction cycle.
Loads contents of interrupt
stack register to PSWORD
Increments value of stack pointer by 1
Loads contents of stack addressed by
stack pointer to program counter
To enable an interrupt after the processing of an interrupt has been finished, the EI instruction must be
executed immediately before the RETI instruction.
Accepting the interrupt is enabled by the EI instruction after the instruction next to the EI instruction has been
executed. Therefore, the interrupt is not accepted between the EI and RETI instructions.
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