ST72311 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST72311

8-BIT MCU WITH 8 TO 16K ROM/OTP/EPROM, 384 TO 512 BYTES RAM, ADC, WDG, SCI, SPI AND 2 TIMERS

STMicroelectronics 

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ST72311

INTERRUPTS (Cont’d)

Figure 16. Interrupt Processing Flowchart

FROM RESET

N

BIT I SET

Y

FETCH NEXT INSTRUCTION

N

INTERRUPT

N

EXECUTE INSTRUCTION

IRET

Y

Y

STACK PC, X, A, CC

SET I BIT

LOAD PC FROM INTERRUPT VECTOR

RESTORE PC, X, A, CC FROM STACK

THIS CLEARS I BIT BY DEFAULT

VR01172D

20/94

20

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