| ??? 05/24/07 12:35 Modified: 05/24/07 12:38 Read: times Msg Score: +1 +1 Informative |
#139742 - yse a FRAM or EEPROM Responding to: ???'s previous message |
a small serial EEPROM can be had for $0.25 and, if that endurance is not good enough, then use FRAM (ramtron).
If password security is essential, here is a trick. Store the customer in a socketed EEPROM/FRAM and give the service techs a chip with a known password. That way you do not need to have the 'service passwoerd' (which ALWAYS end up 'common knowledge') functional. Erik |
| Topic | Author | Date |
| storing constants | 01/01/70 00:00 | |
| Non-Volatile Storage required | 01/01/70 00:00 | |
| version of keil | 01/01/70 00:00 | |
| not on this one | 01/01/70 00:00 | |
| battery backed | 01/01/70 00:00 | |
| yse a FRAM or EEPROM | 01/01/70 00:00 | |
| I don't think the customer will like this... :-) | 01/01/70 00:00 | |
| Good catch, Jan | 01/01/70 00:00 | |
| Battery can be removed | 01/01/70 00:00 | |
| not for that reason | 01/01/70 00:00 | |
| hidden password | 01/01/70 00:00 | |
Secure EEPROM? | 01/01/70 00:00 |