| ??? 11/04/09 17:22 Modified: 11/04/09 17:24 Read: times |
#170444 - I second Responding to: ???'s previous message |
Andrew Ayre said:
My guess is that somehow the status byte has become set, which will force execution of the bootloader after every reset. Sounds like. Andrew Ayre said:
Are you using an external watchdog? I believe anecdotal evidence has suggested in the past that a lack of an external watchdog with some flash based microcontrollers can cause memory corruption. I would not call for a watchdog but for a reset. Andrew Ayre said:
I would also look at VCC, ground, etc. to make sure you are well within the limits in the data sheet and nothing is marginal. ... decoupling, ESD protection, etc... JW |
| Topic | Author | Date |
| P89C51RD fail to enter ISP mode | 01/01/70 00:00 | |
| is it in ISP mode? | 01/01/70 00:00 | |
| #170409 - is it in ISP mode? | 01/01/70 00:00 | |
| what is exactly the response? | 01/01/70 00:00 | |
| Echo X | 01/01/70 00:00 | |
| Status Byte | 01/01/70 00:00 | |
| Status Byte | 01/01/70 00:00 | |
I second | 01/01/70 00:00 | |
| Have you posted it on NXP Forum ? | 01/01/70 00:00 | |
| No, I havent posted it on NXP Forum ! | 01/01/70 00:00 | |
| Then Please Do That | 01/01/70 00:00 | |
| Cross-posting | 01/01/70 00:00 | |
| the NXP forum is dead... | 01/01/70 00:00 | |
| not quite, more like in a coma | 01/01/70 00:00 | |
| 'C51-related fora | 01/01/70 00:00 |