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ST20C2 Folha de dados(PDF) 94 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) 94 Page - STMicroelectronics

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iret
®
94/212
iret
interrupt return
Code: 61 FF
Description: Return from external interrupt. Signal
iret to interrupt handler and return
to the context of the interrupted process and resume execution. The interrupted high
priority state is recovered from the workspace – if this does not contain a running
process the processor switches to the interrupted low priority state held in the shadow
registers.
Definition:
Status
′← word[Wptr]
if (Status
has valid bit set)
{
Wptr
′← word[Wptr + 1]
Iptr
′← word[Wptr + 2]
Areg
′← word[Wptr + 3]
Breg
′← word[Wptr + 4]
Creg
′← word[Wptr + 5]
}
else
Return to interrupted low priority state
Error signals: none
Comments:
Secondar y instruction.



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