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Topic Title: am188es interrupt problem
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Created On: 05/08/2004 06:30 AM
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 05/08/2004 06:30 AM
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jkchen1
Junior Member

Posts: 1
Joined: 05/08/2004

hello,
i'm recently debuging a system using a am188es-25 chip. the program is working fine except one thing:
In the system, 7 external interrupt is used(full nesty mode,all periodical pulse). some of them is periodically enabled and disabled(use imask register 28h). when the interrupt is enabled(interrupt signal is not actived), the interrupt service routine is actived immediately and run only once.
it seems that the interrupt signal is latched, regardless the imask register's status.

Is this phenomenon normal or i miss something?

regards
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