ST7MDT1-DVP2 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7MDT1-DVP2

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES

STMicroelectronics 

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ST72104G, ST72215G, ST72216G, ST72254G

INTERRUPTS (Cont’d)

Figure 15. 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

Table 5. Interrupt Mapping

N°

Source

Block

Description

RESET Reset

TRAP

Software Interrupt

0

ei0

External Interrupt Port A7..0 (C5..01)

1

ei1

External Interrupt Port B7..0 (C5..01)

2

CSS

Clock Security System Interrupt

3

SPI

SPI Peripheral Interrupts

4

TIMER A TIMER A Peripheral Interrupts

5

Not used

6

TIMER B TIMER B Peripheral Interrupts

7

Not used

8

Not used

9

Not used

10

Not used

11

I²C

I²C Peripheral Interrupt

12

Not Used

13

Note

Not Used

1. Configurable by option byte.

Register

Label

Priority

Order

Exit

from

HALT

Highest yes

Priority no

N/A

yes

CRSR

SPISR

no

TASR

TBSR

no

I2CSRx

no

Lowest

Priority

Address

Vector

FFFEh-FFFFh

FFFCh-FFFDh

FFFAh-FFFBh

FFF8h-FFF9h

FFF6h-FFF7h

FFF4h-FFF5h

FFF2h-FFF3h

FFF0h-FFF1h

FFEEh-FFEFh

FFECh-FFEDh

FFEAh-FFEBh

FFE8h-FFE9h

FFE6h-FFE7h

FFE4h-FFE5h

FFE2h-FFE3h

FFE0h-FFE1h

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