| ??? 07/19/06 10:49 Read: times |
#120563 - AT89S8253 supervisor worse than R/C ??? |
I'm replacing the 8252 with the 8253 in an existing low-power design.
with the AT89S8252 and a EM6324 supervisor the consumption is about 11uA at 5.5V during sleep. (AT89S8252 w-o supervisor 6uA) AT89S8253 has a buil-in POR and BOD wow! sounds good!! 8253 alone 10.4uA (all values are measured, datasheet just says max 100uA !) But now the bad: the supervisor does not reset the uP with very slow voltage ramps. The datasheet says very little about the BOD POR and when I understand the graph, the uP is allowed to run below the 2.7V operating range!! Has anybody experience with this internal supervisor, or a decent explanation (can the supervisor be disabled like in the PICs?) |
| Topic | Author | Date |
| AT89S8253 supervisor worse than R/C ??? | 01/01/70 00:00 | |
| not 'this' | 01/01/70 00:00 | |
| gets better... | 01/01/70 00:00 | |
| can you please be more specific? | 01/01/70 00:00 | |
No mistery, but contradiction! | 01/01/70 00:00 |