| ??? 08/12/11 07:33 Modified: 08/12/11 07:55 Read: times |
#183314 - Generating Interrupt Signal. |
Greetings fellow 8052.com members.
I have need to generate a brief, low-going interrupt signal to bring an AT89C51AC2 out of power down mode. I would like this interrupt signal to be generated whenever the normally ground-level output of another controller goes tristate. This transition occurs about every 24-hours, and lasts for about 5-seconds. Now, the most logical solution would be to run the 2nd controller's tristate-active output through an inverter, and then use a simple RC circuit to generate the brief, low-going interrupt. Trouble is that I don't think I have the necessary power available to run the inverter, and I'm pretty much out of board space. Can anyone think of a simple way out of this situation, one that doesn't use a lot of energy whilst the 2nd controller's triggering output is inactive (low)? Regards, M. |
| Topic | Author | Date |
| Generating Interrupt Signal. | 01/01/70 00:00 | |
| Power for inverter | 01/01/70 00:00 | |
| 74HC1G14GW | 01/01/70 00:00 | |
| Yep, that will do the job. | 01/01/70 00:00 | |
| Catching the L--->TS Condition | 01/01/70 00:00 | |
| Less logic? | 01/01/70 00:00 | |
| Talking About Circuits | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| Open inputs | 01/01/70 00:00 | |
Will do. | 01/01/70 00:00 |