ST52T441 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST52T441

8-BIT INTELLIGENT CONTROLLER UNIT (ICU) Timer/PWM, Analog Comparator, Triac/PWM Timer, WDG

STMicroelectronics 

ST52T400/T440/E440/T441

gram, the flags are restored and the program con-

tinues from the instruction immediately following

the interrupted instruction.

4.6 Interrupts and Low power mode

All interrupts allow the processor to leave WAIT

mode. Only an External Interrupt request allows

the processor to leave HALT mode: if the interrupt

is masked, the related interrupt routine is not ser-

viced and the program continues from the first

instruction after the HALT instruction.

4.7 Interrupt RESET

When an interrupt request is sent but the interrupt

is masked, it isn’t serviced and remains pending,

so that when the interrupt is enabled it is serviced

immediately. In order to avoid this from happen-

ing, the pending interrupt request can be reset

with the instruction RINT j, which resets the

interrupt j-th where j identify the peripherals as

described in the following table (see Table 4.4).

The assembler instruction:

WARNING: If an interrupt is reset, with the RINT

instruction within its own interrupt routine, the

priority level of the interrupt becomes the lowest

and the routine can be immediately interrupted by

a lower priority interrupt request.

Table 4.4 RINT Instruction Code

Peripheral Name

Analog Comparator (*)

PWM/TIMER

TRIAC/F

INT_TRIAC/R

INT_TRIAC/P

External Interrupt

(*) Not Used in ST52x400 devices

Value

0

1

2

3

4

5

RINT 2

Resets the TRIAC/PWM_F interrupt.

Figure 4.6 Example of a sequence of Interrupt Requests

PRIORITY

LEVEL

0

1

2

3

4

5

INT2 INT0 INT4 INT1

INT3

INT0

INT1

INT2

INT2

INT2

INT3

INT4

6

MAIN PROGRAM

MAIN PROGRAM

41/94

Share Link: