CST12.0MTWA datasheet(34/153 Pages) STMICROELECTRONICS

34 / 153 page

ST72334J/N, ST72314J/N, ST72124J

34/153

INTERRUPTS (Cont’d)

Figure 18. Interrupt Processing Flowchart

Table 5. Interrupt mapping

Note 1. Valid for HALT and ACTIVE-HALT modes except for the MCC/RTC or CSS interrupt source which exits from

ACTIVE-HALT mode only.

N°

Source

Block

Description

Label

Priority

Order

Exit

from

HALT1)

Address

Vector

RESET

Reset

N/A

Highest

Priority

Lowest

Priority

yes

FFFEh-FFFFh

TRAP

Software Interrupt

FFFCh-FFFDh

Not used

FFFAh-FFFBh

MCC/RTC

CSS

Main Clock Controller Time Base Interrupt

or Clock Security System Interrupt

MCCSR

CRSR

yes

FFF8h-FFF9h

ei0

External Interrupt Port A3..0

N/A

FFF6h-FFF7h

ei1

External Interrupt Port F2..0

FFF4h-FFF5h

ei2

External Interrupt Port B3..0

FFF2h-FFF3h

ei3

External Interrupt Port B7..4

FFF0h-FFF1h

Not used

FFEEh-FFEFh

SPI

SPI Peripheral Interrupts

SPISR

FFECh-FFEDh

TIMER A

TIMER A Peripheral Interrupts

TASR

FFEAh-FFEBh

TIMER B

TIMER B Peripheral Interrupts

TBSR

FFE8h-FFE9h

SCI

SCI Peripheral Interrupts

SCISR

FFE6h-FFE7h

Data-EEPROM Data EEPROM Interrupt

EECSR

FFE4h-FFE5h

Not used

FFE2h-FFE3h

FFE0h-FFE1h

I BIT SET?

IRET?

FROM RESET

LOAD PC FROM INTERRUPT VECTOR

STACK PC, X, A, CC

SET I BIT

FETCH NEXT INSTRUCTION

EXECUTE INSTRUCTION

THIS CLEARS I BIT BY DEFAULT

RESTORE PC, X, A, CC FROM STACK

INTERRUPT

PENDING?

CST12.0MTWA Datasheet(PDF) 34 Page - STMicroelectronics

CST12.0MTWA Datasheet(HTML) 34 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL