| ??? 09/16/14 23:01 Read: times |
#190351 - check EA and Pgm Responding to: ???'s previous message |
An active PSEN means either EA is low (forcing External code Access), or it has simply run past the 4K limit
(which it will do on a blank device) Pgm a part with a 2 line ASM pin-toggle loop, to confirm you have correct ISP flows. |
| Topic | Author | Date |
| PSEN outputting freq/code does not run | 01/01/70 00:00 | |
| check EA and Pgm | 01/01/70 00:00 | |
| Done checking already | 01/01/70 00:00 | |
| dollars to doughnots I bet | 01/01/70 00:00 | |
| any other reason/remedy | 01/01/70 00:00 | |
| Reset circuit | 01/01/70 00:00 | |
Have you read the datasheet? | 01/01/70 00:00 |