ST7L19: Ext Interrupt wrong

jacktan1 · ‎2004-01-27

Posted on January 28, 2004 at 04:50

jacktan1 · ‎2004-01-27

Posted on January 28, 2004 at 00:55

Hi,

I define the PA0 as ei0 int pin. The sensitivity is ''Falling edge only'', I am sure that the EICR = #$06 and EISR = #$0c , they were set just after power on reset, and no modification is done after then. Now the question is:

An interrupt is generated by both falling edge and low level . I have observed there is no falling edge occured during the low level period.

Thanks,

J.V.

jatin · ‎2004-01-27

Posted on January 28, 2004 at 02:57

It is not the normal behavior. Please make sure the interrupt pin is configured in the input pull up mode. Also check it by modify/rewrite the sensitivity bits with in the interrupt routines. If the problem is due to pending interrupts then it should be removed.

[ This message was edited by: Jatin on 28-01-2004 07:28 ]

[ This message was edited by: Jatin on 28-01-2004 07:29 ]

jacktan1 · ‎2004-01-27

Posted on January 28, 2004 at 04:50

Hi Jatin,

As you said, it is caused by pending interrupt.

Thank very much!

J.V.