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ST20C4 Arkusz danych(PDF) 113 Page - STMicroelectronics

Numer części ST20C4
Szczegółowy opis  Instruction Set Reference Manual
PDF  212 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST20C4 Arkusz danych(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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