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ST72E121 Fiches technique(PDF) 19 Page - STMicroelectronics

No de pièce ST72E121
Description  8-BIT MCU WITH 8 TO 16K OTP/EPROM, 384 TO 512 BYTES RAM, WDG, SCI, SPI AND 2 TIMERS
PDF  92 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72E121 Fiches technique(HTML) 19 Page - STMicroelectronics

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ST72E121 ST72T121
INTERRUPTS (Cont’d)
Figure 15. Interrupt Processing Flowchart
BIT I SET
Y
N
IRET
Y
N
FROM RESET
LOAD PC FROM INTERRUPT VECTO R
STACK PC, X, A, CC
SET I BIT
FETCH NEXT INSTR UCTION
EXECU TE INSTRUCTION
THIS CLEARS I BIT BY DEFAULT
RESTORE PC, X, A, CC FROM STACK
BIT I SET
Y
N
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