ST52T410 datasheet(32/84 Pages) STMICROELECTRONICS

32 / 84 page

ST52T410/ST52T420/E420

32/84

Figure 4.6 Example of a sequence of Interrupt requests

Note: The Interrupt priority must be fixed at the

beginning of the main program because at the

RESET

REG_CONF1=’00000000’

could

generate

erroneous

operations.

During

program execution the interrupt priority can

only be modified with the following procedure:

STEP 1:

Mask theinterruptsbymeansofaUDGI (or

MDGI) instruction

STEP 2:

Change the REG_CONF 1 values to modify the

interrupt priority

STEP 3:

Reset all the pending interrupt instructions by

means of RINT instructions.

STEP 4:

Unmask theinterruptsbymeansofaUEGI (or

MEGI) instruction

When a source provides an Interrupt request and

the request processing is also enabled, the CU

changes the normal sequential flow of a program

by transferring program control to a selected

service routine.

When an interrupt occurs the CU executes a JUMP

instruction to the address loaded in the related

location of the Interrupt Vector.

When the execution returns to the original program

it immediately begins following the instruction that

was interrupted.

(*) ST52x420 only

Table 4.4 RINT Instruction code

Peripheral Name

Value

INT_ADC (*)

PWM/TIMER 0

PWM/TIMER 1

PWM/TIMER 2

INT_EXT

MAIN PROGRAM

PRI2

PRI0

PRI2

PRI1

PRI2

PRI3

PRI4

MAIN PROGRAM

PRIORITY

LEVEL

PRI2

PRI0

PRI4

PRI1

PRI3

ST52T410 데이터시트(PDF) 32 Page - STMicroelectronics

ST52T410 데이터시트(HTML) 32 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

데이터시트 다운로드

링크 URL