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DP80390 데이터시트(PDF) 70 Page - Digital Core Design

부품명 DP80390
상세설명  Pipelined High Performance Microcontroller Instructions set details ver 3.10
PDF  84 Pages
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제조업체  DCD [Digital Core Design]
홈페이지  http://www.digitalcoredesign.com
Logo DCD - Digital Core Design

DP80390 데이터시트(HTML) 70 Page - Digital Core Design

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DP80390 Instructions set details
- 70 -
All trademarks mentioned in this document
http://www.DigitalCoreDesign.com
are trademarks of their respective owners.
http://www.dcd.pl
Copyright 1999-2003 DCD – Digital Core Design. All Rights Reserved.
3.33.2.
FLAT
Function:
Return from interrupt
Description:
RETI pops the PC successively from the stack, and restores the
interrupt logic to accept additional interrupts at the same priority level as
the one just processed. The stack pointer is left decremented by three.
No other registers are affected; the PSW is not automatically restored to
its pre-interrupt status. Program execution continues at the resulting
address, which is generally the instruction immediately after the point at
which the interrupt request was detected. If a lower or same-level
interrupt is pending when the RETI instruction is executed, that one
instruction will be executed before the pending interrupt is processed.
Operation:
(PC23-16)
← ((SP))
(SP)
← (SP) - 1
(PC15-8)
← ((SP))
(SP)
← (SP) - 1
(PC7-0)
← ((SP))
(SP)
← (SP) - 1
Bytes:
1
Cycles:
5
Encoding:
0
0
1
1
0
0
1
0
* instruction modified regarding to standard 80C51



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