| ??? 03/06/07 17:07 Modified: 03/06/07 17:09 Read: times |
#134390 - Please, Richard, only facts Responding to: ???'s previous message |
Richard said:
One other thing that has piqued my interest is that Maxim freely published information indicating that their DS89C4x0's, in which I'm quite interested, have a flash corruption problem despite the fact they took the trouble to build in their 1232 supervisor. Which one, the DS1232 or MAX1232? They aren't identical.. No, Richard, please, have you any proof that they built-in the 1232?? I think this is entirely untenable. Normally, these built-in brown-out detectors are a universe inferior compared with the MAX1232 or a similar reset chip. Remember, you have much more noise directly on the die than anywhere else on the multilayer board. So, you MUST reduce the sensitivity of internal brown-out detection by lowering the threshold level and slowing down the reaction time. Additionally, you suffer from huge tolerances of threshold voltage when the brown-out detector sits on the same die as the micro. You cannot at all compare a built-in brown-out detector with the sophisticated functionality and performance of a MAX1232. This would mean to compare the Concorde with a Cessna... Kai |
