| ??? 02/28/07 05:36 Read: times |
#133910 - I didn't hear complaints about reset back then Responding to: ???'s previous message |
Kai Klaas said:
Richard said:
Now that the majority of parts are built with FLASH and capable of ISP/IAP code-space management, they don't seem to work so well. Why is that? When the micro's supply voltage goes slowly down, the internal FLASH erase and FLASH write routines can accidentally be invoked. The non-Flash micros can also run ill, but at least their code memory doesn't get corrupted. Richard said:
For about a decade, people were happy with the RC reset that the original mfg intended. Are you sure? They also suffered from ill running micros, when supply voltage dips occured, where the RC-reset "circuitry" principally will not work. Kai There may have been complaints, but I think I'd have heard about them. I started hearing about reset issues and about runaway controllers only after internal FLASH became popular. Before the relatively fast 1-clockers, I had no interest in using 805x unless I was asked to finish what someone else had started (You might be surprised how often that happens!) or unless I was asked to use a specific board on which the things already lived. They were too slow. Aside from that, they had positive-going reset. I never learned to like that. RE |
