ST72E311J4D0S View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72E311J4D0S

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

STMicroelectronics 

ST72E311 ST72T311

INTERRUPTS (Cont’d)

Figure 17. Interrupt Processing Flowchart

FROM RESET

I BIT SET?

N

Y

FETCH NEXT INSTRUCTION

N

INTERRUPT

PENDING?

Y

N

EXECUTE INSTRUCTION

IRET?

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

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