| ??? 06/17/05 06:57 Read: times |
#95135 - Alternatively... Responding to: ???'s previous message |
I said:
... as Russel said, why not just choose a chip that meets your IO requirements without needing an IO expander?! Alternatively, you could tackle the poblem from the other end, and look at ways to reduce your IO pin requirements: SPI and I2C have already been mentioned - these are low-pin-count interfaces. Or there's the Dalla 1-WireTM bus - requires only a single IO pin for a virtually unlimited number of peripherals. It's not that fast, but certainly very economical on IO pins! |
| 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 |