| ??? 03/14/05 12:11 Read: times |
#89621 - I would not do it. Responding to: ???'s previous message |
I would not take JTAG out to a user accessible connector. Keep JTAG on-board / in-system for "in service center" re-programming. Instead put a UART I/O out the service connector and put a robust and reliable boot loader technology behind that port. You need to use care there is NO chance flash could get erased.
You also need to ensure that there is NO way that JTAG operation could get invoked accidently. Depending on the application at hand the placing of the JTAG out to a service connector could be a huge liability issue. I have shared a robust Cygnal boot loader design here: http://www.8052.com/users/mkaras/loader.pdf Michael Karas PS If interested there is a VB util for PC end. |
| Topic | Author | Date |
| service connector | 01/01/70 00:00 | |
| Nope | 01/01/70 00:00 | |
| Service Connector | 01/01/70 00:00 | |
| Service Connector | 01/01/70 00:00 | |
| Outsourcing??? | 01/01/70 00:00 | |
| connector | 01/01/70 00:00 | |
| connector | 01/01/70 00:00 | |
| DB15 | 01/01/70 00:00 | |
| Use It! | 01/01/70 00:00 | |
| NOO! | 01/01/70 00:00 | |
| Idiot proof | 01/01/70 00:00 | |
| Murphys law | 01/01/70 00:00 | |
| If power leads , then protect. | 01/01/70 00:00 | |
| power output protection | 01/01/70 00:00 | |
| Special connector. | 01/01/70 00:00 | |
| consider this | 01/01/70 00:00 | |
| LTC 1785 | 01/01/70 00:00 | |
| flip 485/422 | 01/01/70 00:00 | |
| half duplex serial ISP | 01/01/70 00:00 | |
| news to me | 01/01/70 00:00 | |
| I am confused... | 01/01/70 00:00 | |
| begging does not equal having | 01/01/70 00:00 | |
| DIY :-) | 01/01/70 00:00 | |
| if you did not follow the rules | 01/01/70 00:00 | |
| you never begged ME ! | 01/01/70 00:00 | |
| Tx control | 01/01/70 00:00 | |
| Byte-by-byte 485 | 01/01/70 00:00 | |
| have you tried my patch? | 01/01/70 00:00 | |
| to ME | 01/01/70 00:00 | |
| summing up | 01/01/70 00:00 | |
| "fed through a power resistor" ??? | 01/01/70 00:00 | |
| PSU protection | 01/01/70 00:00 | |
| Polyswitch price | 01/01/70 00:00 | |
| Polyswitch II | 01/01/70 00:00 | |
| not to mention | 01/01/70 00:00 | |
| service connector mk. - now with JTAG? | 01/01/70 00:00 | |
| I would not do it. | 01/01/70 00:00 | |
| no JTAG on the service connector | 01/01/70 00:00 | |
Please Contact | 01/01/70 00:00 |