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ST20C2 Folha de dados(PDF) 113 Page - STMicroelectronics

Nome de Peças ST20C2
Descrição Electrónicos  Instruction Set Reference Manual
PDF  212 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST20C2 Folha de dados(HTML) 113 Page - STMicroelectronics

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ldshadow
113/212
®
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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