参数资料
型号: 78064Y
厂商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件页数: 99/129页
文件大小: 644K
代理商: 78064Y
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
99
User's Manual U12326EJ4V0UM
Return from Interrupt
RETI
Return from Hardware Vectored Interrupt
[Instruction format]
RETI
[Operation]
PC
L
PC
H
PSW
SP
NMIS
0
(SP),
(SP+1),
(SP+2),
SP+3,
[Operand]
None
[Flag]
Z
AC
CY
R
R
R
[Description]
This is a return instruction from the vectored interrupt.
The data saved to the stack returns to the PC and the PSW, and the program returns from the interrupt service
routine.
This instruction cannot be used for return from the software interrupt with the BRK instruction.
None of interrupts are acknowledged between this instruction and the next instruction to be executed.
The NMIS flag is set to 1 by acknowledgment of a non-maskable interrupt, and cleared to 0 by the RETI
instruction.
[Caution]
When the return from non-maskable interrupt servicing is performed by an instruction other than the RETI
instruction, the NMIS flag is not cleared to 0, and therefore no interrupts (including non-maskable interrupts)
except software interrupts can be acknowledged.
相关PDF资料
PDF描述
78070A Common to 78K/0 Series
78070AY Common to 78K/0 Series
78075B Common to 78K/0 Series
78075BY Common to 78K/0 Series
78078 Common to 78K/0 Series
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