| Comments about AT89S8253 | | 01/01/70 00:00 |
| are you surprised, it's Atmel | | 01/01/70 00:00 |
| are you surprised, it's Erik | | 01/01/70 00:00 |
| Not neccessarily bugs... | | 01/01/70 00:00 |
| AT89S8253 ALE pulses | | 01/01/70 00:00 |
| Yes, a bit imprecise | | 01/01/70 00:00 |
| And Vcc rise time... | | 01/01/70 00:00 |
| What kind of "external reset"? | | 01/01/70 00:00 |
| not that fast, Kai | | 01/01/70 00:00 |
| Not so fast, Jan... | | 01/01/70 00:00 |
| speaking from experience... | | 01/01/70 00:00 |
| ...as engineer? | | 01/01/70 00:00 |
| make that darn datasheet 5000 pages | | 01/01/70 00:00 |
| Exactly! | | 01/01/70 00:00 |
| I'm not sure what you mean, Kai | | 01/01/70 00:00 |
| That's what I meant | | 01/01/70 00:00 |
| Serial hung. | | 01/01/70 00:00 |
| migration | | 01/01/70 00:00 |
| Please quote carefully... | | 01/01/70 00:00 |
| is it possible | | 01/01/70 00:00 |
| I don't think so... | | 01/01/70 00:00 |
| Any reset | | 01/01/70 00:00 |
| I've wondered about this ... | | 01/01/70 00:00 |
| Indeed! | | 01/01/70 00:00 |
| Perhaps they're part of the problem ... | | 01/01/70 00:00 |
| Do you think... | | 01/01/70 00:00 |
| That's not clear to me. | | 01/01/70 00:00 |
| not here | | 01/01/70 00:00 |
| These are all COTS SMPS\' | | 01/01/70 00:00 |
| startup | | 01/01/70 00:00 |
| Is it not instead a problem of letting reset go be | | 01/01/70 00:00 |
| staring problem | | 01/01/70 00:00 |
| have you never stared at a problem :) | | 01/01/70 00:00 |
| Ah, so you meant.... | | 01/01/70 00:00 |
| What resets? | | 01/01/70 00:00 |
| Any reset! | | 01/01/70 00:00 |
| I got what you mean | | 01/01/70 00:00 |
| Circuit proposed | | 01/01/70 00:00 |
| Interesting! | | 01/01/70 00:00 |
| SMPS and LC filter | | 01/01/70 00:00 |
| Switchers & low ESR | | 01/01/70 00:00 |
| you missed the point | | 01/01/70 00:00 |
| What 100nF? | | 01/01/70 00:00 |
| Rob is right | | 01/01/70 00:00 |
| Ah | | 01/01/70 00:00 |
| Erik, you do use switchers frequently... | | 01/01/70 00:00 |
| nope, all I know is that they work and work and wo | | 01/01/70 00:00 |
| Thanks | | 01/01/70 00:00 |
| so ... Kai ... how would YOU build a power switch? | | 01/01/70 00:00 |
| there is no difference between "no power" and "in | | 01/01/70 00:00 |
| There is a difference ... no power means no clock | | 01/01/70 00:00 |
| ah, an investigatory measure | | 01/01/70 00:00 |
| The Max1232 gets pretty confused ... | | 01/01/70 00:00 |
| what decoupling do you have across the supervisor | | 01/01/70 00:00 |
| This was a Philips ... | | 01/01/70 00:00 |
| Too fast? | | 01/01/70 00:00 |
| The risetime isn\'t all that fast. | | 01/01/70 00:00 |
| More details, please? | | 01/01/70 00:00 |
| So far, it's just the reset that's been broken | | 01/01/70 00:00 |
| Throw away the DS1232!! | | 01/01/70 00:00 |
| I\'ll have to send for a couple ... | | 01/01/70 00:00 |
| I've seen that one and it did not work | | 01/01/70 00:00 |
| Especially difficult to design | | 01/01/70 00:00 |
| Datasheets | | 01/01/70 00:00 |
| 610msec reset active time of MAX1232 not enough? | | 01/01/70 00:00 |
| Let's get to the bottom of it ... | | 01/01/70 00:00 |
| Some ideas... | | 01/01/70 00:00 |
| each flash/eeprom HAS a charge pump... | | 01/01/70 00:00 |
| Exactly, Jan! | | 01/01/70 00:00 |
| Yes, but ... | | 01/01/70 00:00 |
| Why there are reset issues | | 01/01/70 00:00 |
| so you're saying I should pull down ALE and nPSEN | | 01/01/70 00:00 |
| Real Reset | | 01/01/70 00:00 |
| be careful... | | 01/01/70 00:00 |
| never heard of that one, can you elaborate | | 01/01/70 00:00 |
| Elaborations on Reset | | 01/01/70 00:00 |
| Mayabe that's worth some study ... | | 01/01/70 00:00 |
| Which chip are you using? | | 01/01/70 00:00 |
I can try several, but for now, Philips | | 01/01/70 00:00 |
| DS1232? | | 01/01/70 00:00 |
| it means Dallas Semiconductor | | 01/01/70 00:00 |
| re 1232 | | 01/01/70 00:00 |
| Sorry. | | 01/01/70 00:00 |
