| ??? 02/24/05 08:38 Read: times |
#88285 - service connector |
I am designed a AT89C51RB2 "powered" officemachine controller. It will have a connector on its rear for controlling some other devices, for putting it into "service mode", and for programming the µC. It wont be fieldprogrammed; it will be programmed at the factory only. On the other hand - I dont know who will service this mainly mechanical device, and what they might do to this connector. My question is: Should I throw a MAX 232 or the like on every board, or should I just protect the txd/rxd portpins with a series resistor and a cap to ground, and a 'HC14 buffer betwen this and the µc?
I would like to hear from those of you who deals with this in real - what do you do, and how does it work. Ha' en god dag Per Guldmann |
| 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 |