| How to extend the ports of 8051? | | 01/01/70 00:00 |
| I2C, SPI, 1-Wire, CPLD | | 01/01/70 00:00 |
| Why "avoid 8259"? | | 01/01/70 00:00 |
| Why "avoid 8259"? | | 01/01/70 00:00 |
| Hi | | 01/01/70 00:00 |
| Hi | | 01/01/70 00:00 |
| Examples | | 01/01/70 00:00 |
| Choose an 8051 w. sufficient IO in the 1st place! | | 01/01/70 00:00 |
| all 8051\'s have the same amount of I/O | | 01/01/70 00:00 |
| list please | | 01/01/70 00:00 |
| typo ... sorry ... | | 01/01/70 00:00 |
| OK then, "derivative" | | 01/01/70 00:00 |
| huh? | | 01/01/70 00:00 |
| I think he means... | | 01/01/70 00:00 |
| you're right, and that's the point, actually | | 01/01/70 00:00 |
| cause and effect | | 01/01/70 00:00 |
| Clarification please | | 01/01/70 00:00 |
| Clarification | | 01/01/70 00:00 |
| Hi | | 01/01/70 00:00 |
| Specifics ? | | 01/01/70 00:00 |
| Hi | | 01/01/70 00:00 |
| 8255 | | 01/01/70 00:00 |
| Avoid 8255! | | 01/01/70 00:00 |
| 8255 Is Available in India | | 01/01/70 00:00 |
| I learned the 8085 and 8255 in college | | 01/01/70 00:00 |
| more number blindness? | | 01/01/70 00:00 |
| Yes | | 01/01/70 00:00 |
| Actually, it IS possible ... but you\'re right | | 01/01/70 00:00 |
| why? | | 01/01/70 00:00 |
| who said useless? | | 01/01/70 00:00 |
| so the blind should lead the deaf? | | 01/01/70 00:00 |
| somebody's got to do it! | | 01/01/70 00:00 |
| What do you mean by "cumbersome?" | | 01/01/70 00:00 |
| which antique store do you shop at? | | 01/01/70 00:00 |
| FAQ | | 01/01/70 00:00 |
| now THAT would be helpful to many! | | 01/01/70 00:00 |
| nobody said so | | 01/01/70 00:00 |
| too slow? | | 01/01/70 00:00 |
| if you want a FAQ ... | | 01/01/70 00:00 |
| Input or Output | | 01/01/70 00:00 |
| Well ... the Motorola parts did that ... bitwise | | 01/01/70 00:00 |
| Port C | | 01/01/70 00:00 |
| Hi Everyboody! | | 01/01/70 00:00 |
| Port I/O of 8051 | | 01/01/70 00:00 |
| Serial and parallel I/O | | 01/01/70 00:00 |
| As many as two?! | | 01/01/70 00:00 |
| port expansion | | 01/01/70 00:00 |
| Oops - you've been in that museum again! | | 01/01/70 00:00 |
| that I know but | | 01/01/70 00:00 |
| sure | | 01/01/70 00:00 |
| i have not and I can't | | 01/01/70 00:00 |
| sorry... | | 01/01/70 00:00 |
| WSI; Waferscale; ST; PSM; PSD | | 01/01/70 00:00 |
| wotizit? | | 01/01/70 00:00 |
| wired or line | | 01/01/70 00:00 |
| I'd not call it a "pin extension"... | | 01/01/70 00:00 |
| I would | | 01/01/70 00:00 |
| Requirements | | 01/01/70 00:00 |
| FAQ | | 01/01/70 00:00 |
| a good start, but woefully incomplete | | 01/01/70 00:00 |
| Triscend - now Zylogic | | 01/01/70 00:00 |
| "woefully incomplete", eh? | | 01/01/70 00:00 |
| response | | 01/01/70 00:00 |
| there are some \"gotchas\" | | 01/01/70 00:00 |
| I used them before they became flash parts | | 01/01/70 00:00 |
| So, where's the link to the ST software? | | 01/01/70 00:00 |
| let a WSI user find that out | | 01/01/70 00:00 |
| There are no more WSI users ... there's no WSI | | 01/01/70 00:00 |
| WSI usres-PSD usres OK | | 01/01/70 00:00 |
| Richard... What P/N you looking at? | | 01/01/70 00:00 |
| I just skimmed over the four most prominent ones | | 01/01/70 00:00 |
| Is this it? | | 01/01/70 00:00 |
| PSD/uPSD | | 01/01/70 00:00 |
| A couple of Articles on embedded I/O | | 01/01/70 00:00 |
| broken libks | | 01/01/70 00:00 |
| fixed | | 01/01/70 00:00 |
| informative article(s) but ... | | 01/01/70 00:00 |
| CPLDs and FPGAs | | 01/01/70 00:00 |
| differences | | 01/01/70 00:00 |
| that's not really the issue... | | 01/01/70 00:00 |
| They\'re available at no cost | | 01/01/70 00:00 |
| the invasion of ther windows "programmers" | | 01/01/70 00:00 |
| re: CPLDs and FPGAs | | 01/01/70 00:00 |
| Andy PLEASE | | 01/01/70 00:00 |
| I only promote stuff | | 01/01/70 00:00 |
| FPGA/CPLD drawbacks | | 01/01/70 00:00 |
| please make complete statements | | 01/01/70 00:00 |
| @Erik: please read complete: | | 01/01/70 00:00 |
| giving examples does not exclude | | 01/01/70 00:00 |
| well, that's a big maybe ... | | 01/01/70 00:00 |
| an example | | 01/01/70 00:00 |
| voltage is not my choice | | 01/01/70 00:00 |
| where is the beef? | | 01/01/70 00:00 |
| it depends | | 01/01/70 00:00 |
| costs less, too. | | 01/01/70 00:00 |
| consider this ... | | 01/01/70 00:00 |
| but why skin a cat that is rotted? the fur will no | | 01/01/70 00:00 |
| You keep saying that, but WHY? | | 01/01/70 00:00 |
| NO WAY | | 01/01/70 00:00 |
| I'm not from Missouri, but "SHOW ME" | | 01/01/70 00:00 |
| you have now visited Missouri | | 01/01/70 00:00 |
| waitaminute Erik... | | 01/01/70 00:00 |
| and my argument is | | 01/01/70 00:00 |
| your argument is fallacious | | 01/01/70 00:00 |
| once more mixing I/O mapped and MMIO | | 01/01/70 00:00 |
| OFF TOPIC but... | | 01/01/70 00:00 |
| it\'s the disparity between rural and urban areas | | 01/01/70 00:00 |
| I do not, BUT | | 01/01/70 00:00 |
| pins, lost&found | | 01/01/70 00:00 |
| a rephrase, a question and a subject issue | | 01/01/70 00:00 |
| technically | | 01/01/70 00:00 |
| mixing once more | | 01/01/70 00:00 |
| You're being either crazy or stupid, Erik | | 01/01/70 00:00 |
| I think the crazy one is you, Richard | | 01/01/70 00:00 |
| I'm a seasoned man ... | | 01/01/70 00:00 |
| Same back at ya | | 01/01/70 00:00 |
| Now we're into semantics | | 01/01/70 00:00 |
| Now you are completely off the rocker. Who, more | | 01/01/70 00:00 |
| Wake up! | | 01/01/70 00:00 |
| that is a BLATANT LIE | | 01/01/70 00:00 |
| Good grief, Erik! It's not personal ... | | 01/01/70 00:00 |
| YES, YES and YES. I even had to code it in assemb | | 01/01/70 00:00 |
| you could state that explicitly.... | | 01/01/70 00:00 |
| I've tried to be diplomatic | | 01/01/70 00:00 |
| I'll try it, too | | 01/01/70 00:00 |
| the IIC as an alternative | | 01/01/70 00:00 |
| As an alternative, but only sometimes | | 01/01/70 00:00 |
| two viewpoints | | 01/01/70 00:00 |
| SATA | | 01/01/70 00:00 |
| I\'d like to meet... | | 01/01/70 00:00 |
| My point | | 01/01/70 00:00 |
| Parallel works off-board as well | | 01/01/70 00:00 |
| very true, but it doesn\'t apply | | 01/01/70 00:00 |
| try THAT with the 8255 | | 01/01/70 00:00 |
| Erik, it might surprise you to learn ... | | 01/01/70 00:00 |
| WHAT | | 01/01/70 00:00 |
| Erik, in response to WHAT | | 01/01/70 00:00 |
| that implies serial, in which case the 8255 | | 01/01/70 00:00 |
| I said is was parallel-interfaced ... | | 01/01/70 00:00 |
| Please find the word 'parallel', I may be going bl | | 01/01/70 00:00 |
| You're right, I left it out ... | | 01/01/70 00:00 |
| The title of nthe thread is "How to extend the por | | 01/01/70 00:00 |
| Yes, it's HOW TO and not HOW NOT TO ... | | 01/01/70 00:00 |
| attaching an old ratteling caboose to a high speed | | 01/01/70 00:00 |
| not that slow - especially compared to the 8255 | | 01/01/70 00:00 |
| Erik, look at the datasheet ... | | 01/01/70 00:00 |
| how do you propose to \"get it in\" at that speed | | 01/01/70 00:00 |
| Yes, this needs clarification | | 01/01/70 00:00 |
| no, you don't | | 01/01/70 00:00 |
| Erik, Once again, you've brought too much to | | 01/01/70 00:00 |
| nope, there are plenty of boards with (sorry, I kn | | 01/01/70 00:00 |
| Well, show me ... it\'s proven untrue so far. | | 01/01/70 00:00 |
| I am really curious what you are making where a | | 01/01/70 00:00 |
| Been there, done that ... | | 01/01/70 00:00 |
| now you lose me | | 01/01/70 00:00 |
| I don\'t like \'em. | | 01/01/70 00:00 |
| Jan ... DIGIKEY's not always the cheapest | | 01/01/70 00:00 |
| of course, if you can sell the sh eh stuff | | 01/01/70 00:00 |
| the datasheet says ... | | 01/01/70 00:00 |
| are you mixing cement in a futile attempt to cast | | 01/01/70 00:00 |
| go back to school, Erik! | | 01/01/70 00:00 |
| go back to school, Erik! | | 01/01/70 00:00 |
| I say, you say | | 01/01/70 00:00 |
| Erik, go back and read the whole thing | | 01/01/70 00:00 |
| had Peter IlyitchTscaikowsky lived ... | | 01/01/70 00:00 |
| one more... :-) | | 01/01/70 00:00 |
| hve you see any post stating that? | | 01/01/70 00:00 |
| yes. Richard's... :-) | | 01/01/70 00:00 |
| and that was because ... | | 01/01/70 00:00 |
| Why is this so endlessly fascinating? | | 01/01/70 00:00 |
| to Jez | | 01/01/70 00:00 |
| i dunno | | 01/01/70 00:00 |
| "Extending Input/output" | | 01/01/70 00:00 |
"Extending Input/output" | | 01/01/70 00:00 |
