| ??? 12/01/07 07:35 Modified: 12/01/07 07:38 Read: times |
#147681 - A Multiplexer ! Responding to: ???'s previous message |
Jay Dave said:
I have Three External IRQ and only have one IRQ pin on my controller.
I am looking for suggestions regarding how to handle this three external IRQs. As already mentioned by Steve If you have spare pins you could use a Multiplexer and poll for the IRQ ,If no pins you may use a I²C bus extender, though an extra burden. APC |
| Topic | Author | Date |
| three external IRQ and only one IRQ pin availble | 01/01/70 00:00 | |
| Polled interrupts | 01/01/70 00:00 | |
| Need more input | 01/01/70 00:00 | |
| A Multiplexer ! | 01/01/70 00:00 | |
| Re | 01/01/70 00:00 | |
| request for more info | 01/01/70 00:00 | |
| Edge triggered or level triggered? | 01/01/70 00:00 | |
| more information | 01/01/70 00:00 | |
| and IRQ is edge triggered... | 01/01/70 00:00 | |
| there are many possibilities | 01/01/70 00:00 | |
| RE:there are many | 01/01/70 00:00 | |
| if it don't show your code | 01/01/70 00:00 | |
| comparators works great | 01/01/70 00:00 | |
| three by two | 01/01/70 00:00 | |
does not work | 01/01/70 00:00 |