| ??? 10/16/10 19:50 Read: times |
#179135 - Maybe a problem with your sequence Responding to: ???'s previous message |
First off, you are referring to:
http://www.atmel.com/dyn/produ...rt_id=3960 which will give you the errata and other important documents. Looking within the datasheet on page 32 at the top ATMEL Datasheet said:
The Hardware conditions (EA = 1, PSEN = 0) during the Reset falling edge force the on-chip bootloader execution. According to your sequence you're pulling PSEN low too late. I figured you would be able to program this device if it came directly from the manufacture as they usually leave most of their devices in a bootloader state, but maybe this chip is special? |
| Topic | Author | Date |
| Problem related to programing AT89c51RE2 | 01/01/70 00:00 | |
| Maybe a problem with your sequence | 01/01/70 00:00 | |
| Lets Read That Again | 01/01/70 00:00 | |
| You normally hold PSEN and then RESET | 01/01/70 00:00 | |
| I knew about the 1k... | 01/01/70 00:00 | |
| psen low, rst high before power applied | 01/01/70 00:00 | |
| just curious | 01/01/70 00:00 | |
| my mistake | 01/01/70 00:00 | |
| Problem still is persisting | 01/01/70 00:00 | |
I only use Atmel for 8051 | 01/01/70 00:00 |