| ??? 09/03/09 08:41 Read: times |
#168718 - Is pull-up needed for INT0 / INT1 |
Hi,
In one of my prototype, I am invoking P89V51RD2's sleep mode, which is suppose to be cancelled using a PIR-Module's output pin (active low). The PIR Module is connected to INT0. The issue is MCU is waking up at random (5-6 times a day). Currently prototype is mounted, and few testings are being performed on prototype. Dismounting it to probe INT0 voltage level may not be possible. I did not add a pull-up on INT0, could that be reason. Is pull-up necessary for INT0. PIR module is tested OK. Please advice and help. regards, Anurag |
| Topic | Author | Date |
| Is pull-up needed for INT0 / INT1 | 01/01/70 00:00 | |
| Is the PIR output open collector? | 01/01/70 00:00 | |
| PIR is inverted using a BC547 | 01/01/70 00:00 | |
| Use a base-emitter resistor | 01/01/70 00:00 | |
| /INT0 : write 1 to config as i/p pin ? | 01/01/70 00:00 | |
| Of course you should be an input | 01/01/70 00:00 | |
Don't think that way! | 01/01/70 00:00 |