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ST20C4 데이터시트(PDF) 113 Page - STMicroelectronics

부품명 ST20C4
상세설명  Instruction Set Reference Manual
PDF  212 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST20C4 데이터시트(HTML) 113 Page - STMicroelectronics

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ldshadow
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®
ldshadow
load shadow registers
Code: 60 FC
Description: Selectively load (depending on Areg) the shadow registers of the
priority determined by Breg from the block of store addressed by Creg. This
instruction should only be used with Breg not equal to the current priority.
Definition:
if (Breg
≠ Priority)
{
if (Areg0 = 1)
{
GlobalInterruptEnables
′← word[Creg]
16..23
TrapEnables
′[Breg]
← word[Creg]
0..13
}
if (Areg1 = 1)
{
Status
′[Breg]
← word[Creg @ 1]
Wptr
′[Breg]
← word[Creg @ 2]
Iptr
′[Breg
← word[Creg @ 3]
}
if (Areg2 = 1)
{
Areg
′[Breg]
← word[Creg @ 4]
Breg
′[Breg]
← word[Creg @ 5]
Creg
′[Breg]
← word[Creg @ 6]
}
if (Areg3 = 1)
{
Load block move registers for priority Breg from
word
′[Creg @ 7] .. word′[Creg @ 11]
}
}
else
Undefined effect
Areg
′← undefined
Breg
′← undefined
Creg
′← undefined
Error signals:
none



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