| ??? 11/29/08 20:41 Read: times |
#160421 - 'some' may not be a problem .... Responding to: ???'s previous message |
Not so! If your chip is experiencing a 0.9V low on some or most of its I/Os there has to be something terribly wrong
at http://www.8052.com/forum/read/160368 I quoted a part of the datasheet "experiencing a 0.9V low on some of its I/Os" i.e. 1 or 2 may not be a problem if they do not drive logic but e.g. a low power relay. Erik |
| Topic | Author | Date |
| ouput voltage when pin is pulled low | 01/01/70 00:00 | |
| Check the datasheet | 01/01/70 00:00 | |
| Different VOLs? | 01/01/70 00:00 | |
| Why not? | 01/01/70 00:00 | |
| Always variances | 01/01/70 00:00 | |
| Shouldn't be that different! | 01/01/70 00:00 | |
| the thing in the datasheet everybody misses | 01/01/70 00:00 | |
| Within limits but.. | 01/01/70 00:00 | |
| AT 25 mA!!! | 01/01/70 00:00 | |
| Average | 01/01/70 00:00 | |
| Not modulating the pin! | 01/01/70 00:00 | |
| ...any low is a fine low! | 01/01/70 00:00 | |
| 'some' may not be a problem .... | 01/01/70 00:00 | |
| Of course, but... | 01/01/70 00:00 | |
| No, it is not fine! | 01/01/70 00:00 | |
no, it is not | 01/01/70 00:00 |