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???
03/24/04 01:05
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 		 #67325 - RE: 8 External interrupt in 51 controlle
Responding to: ???'s previous message
D) Or, if your micro has I2C support, you could use one of those Philips 8574 I2C-to-8-bit-parallel chips that have the interrupt-on-change output. An input changes, the micro is interrupted and reads the 8574 to see what caused the interrupt. This assumes you're willing to pay for the 8574, and that you have an I2C master in your micro, and that the I2C read-out time is acceptable to the application.

Need more interrupt sources? Use one of the 16-bit wide jobs, or more than one 8-bit job.

-a

List of 20 messages in thread
TopicAuthorDate
8 External interrupt in 51 controller            01/01/70 00:00      
   RE: 8 External interrupt in 51 controller            01/01/70 00:00      
      RE: 8 External interrupt in 51 controller            01/01/70 00:00      
         RE: Triscend, or a uPSD?            01/01/70 00:00      
   RE: 8 External interrupt in 51 controller            01/01/70 00:00      
      RE: 8 External interrupt in 51 controller            01/01/70 00:00      
         RE: 8 External interrupt in 51 controlle            01/01/70 00:00      
      RE: 8 External interrupt in 51 controller            01/01/70 00:00      
   RE: 8 External interrupt in 51 controller            01/01/70 00:00      
      RE: 8 External interrupt in 51 controller            01/01/70 00:00      
         RE: 8 External interrupt in 51 controller            01/01/70 00:00      
   RE: 8 External interrupt in 51 controller            01/01/70 00:00      
      RE: 8 External interrupt in 51 controller            01/01/70 00:00      
         RE: 8 External interrupt in 51 controller            01/01/70 00:00      
            RE: 8 External interrupt in 51 controller            01/01/70 00:00      
               RE: 8 External interrupt in 51 controller            01/01/70 00:00      
         RE: 8 External interrupt in 51 controller            01/01/70 00:00      
            RE: 8 External interrupt in 51 controller            01/01/70 00:00      
            Another look at Triscend            01/01/70 00:00      
            RE: 8 External interrupt in 51 controller            01/01/70 00:00      

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