| ??? 06/17/05 05:00 Read: times |
#95129 - Select a device with the i/o you need Responding to: ???'s previous message |
Best to select a device that has all the i/o you need on chip rather than expanding it via the bus. Alternately, use I2C, SPI or some other slightly slower means of getting your i/o. Keeping all your high speed signals on-chip makes for an easier design- especially if you have to comply with EMC regs. Just the mere mention of 8255 is like swearing around here! Mind you, it is available as a military spec device from multiple vendors. I remember the old 8279, 8251A, 8255, 8253 ...... such sweet memories! Motorola fans are also finding it hard to get the venerable old 6821 also! |
| Topic | Author | Date |
| high speed microcontrller | 01/01/70 00:00 | |
| Re: Fast 8255 :-O | 01/01/70 00:00 | |
| Working with high speed micros | 01/01/70 00:00 | |
| Select a device with the i/o you need | 01/01/70 00:00 | |
| Funny | 01/01/70 00:00 | |
| sweary mary | 01/01/70 00:00 | |
| Towing an Ox-cart with your Porsche?! | 01/01/70 00:00 | |
| Alternatively... | 01/01/70 00:00 | |
| Cheaper? | 01/01/70 00:00 | |
| Cheaper! | 01/01/70 00:00 | |
| The first question !!! | 01/01/70 00:00 | |
| See for yourself. | 01/01/70 00:00 | |
| another path | 01/01/70 00:00 | |
| Why on earth | 01/01/70 00:00 | |
| Why on earth not?! | 01/01/70 00:00 | |
| the likelyhood is very small | 01/01/70 00:00 | |
| Exactly | 01/01/70 00:00 | |
| now you lose me | 01/01/70 00:00 | |
| Here's why ... and maybe why not | 01/01/70 00:00 | |
| Free IP | 01/01/70 00:00 | |
| Lotsa misses, few hits | 01/01/70 00:00 | |
| re: Free IP | 01/01/70 00:00 | |
| solution | 01/01/70 00:00 | |
| voltage ... | 01/01/70 00:00 | |
| instead of moaning, use lattice | 01/01/70 00:00 | |
nobody's moaning ... | 01/01/70 00:00 |