| ??? 11/04/09 09:54 Modified: 11/04/09 11:14 Read: times |
#170411 - #170409 - is it in ISP mode? Responding to: ???'s previous message |
When I send :020000050000F9 (read signature byte 1), It respond :020000050000F9X. X : It seem's P89C51RD2 does'nt understand this chain of characters. Before this I send a lot of U to ensure that baud rate is correct point of vue P89C51RD2, RXD and TXD on scope is OK. It's the power up state but after a reset no more echo, no TXD signal on micro pin.
I don't know if P89C51RD2 is in ISP Mode but normal power up is : Our application wich does'nt respond echo to received characters ! All of this, is under scope : RXD and TXD. Security bits are set on our products. I must understand this problem to correct this bug |
| 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 |