| ??? 02/15/05 10:31 Read: times |
#87498 - suggestions Responding to: ???'s previous message |
hi,
Jan Waclawek said:
While not solving the original problem, I am curious whether
- a 2051 and an invertor (as Andy said) would be an appropriate solution for changing the edge of interrupt (and not "bending" the chip) For more flexible system I would suggest to use exclusive or: This way it is possible to select the polatiry of active level of an external interrupt. - pin-compatible more modern replacement for 2051 with some extra features can be found (I am afraid not, the modern derivatives tend to be SMD with 40++ leads;
Atmel produces T89C5115 (packages: PLCC28,SOIC28,VQFP32) with PCA, XRAM, EEPROM, x2 feature and ISP-via-UART. As well, Atmel has announced AT89EB5114 (SO20 package). This device has external interrupts 0 and 1 configurable for detect either falling or rising edge (by bits ESBx of register IOR). Regards, Oleg |
| Topic | Author | Date |
| Ext Interrupt - Transition Activated | 01/01/70 00:00 | |
| Turn a falling edge into a rising edge? | 01/01/70 00:00 | |
| Did you read the | 01/01/70 00:00 | |
| both interrupts possible | 01/01/70 00:00 | |
| I use this | 01/01/70 00:00 | |
| I use PCA | 01/01/70 00:00 | |
| not on AT89C2051 ! | 01/01/70 00:00 | |
| who forces him | 01/01/70 00:00 | |
| Who forces? The circumstances. | 01/01/70 00:00 | |
| New Zealand | 01/01/70 00:00 | |
| Yes, the perspective! | 01/01/70 00:00 | |
| because | 01/01/70 00:00 | |
| I also use AT89C51RC2 | 01/01/70 00:00 | |
| little boy | 01/01/70 00:00 | |
| That's why not | 01/01/70 00:00 | |
glady | 01/01/70 00:00 | |
| Don't underestimate the good old USA | 01/01/70 00:00 | |
| two views | 01/01/70 00:00 | |
| Two academic questions | 01/01/70 00:00 | |
| suggestions | 01/01/70 00:00 | |
| Transition reversed from the bible | 01/01/70 00:00 | |
| language | 01/01/70 00:00 | |
| clarification on the language | 01/01/70 00:00 | |
| something smells | 01/01/70 00:00 | |
| Defective Chip | 01/01/70 00:00 | |
| we have all been there | 01/01/70 00:00 | |
| OK - I'll have a sleep | 01/01/70 00:00 | |
| glitchy? | 01/01/70 00:00 |