| ??? 04/22/05 07:10 Read: times |
#92129 - SD cards Responding to: ???'s previous message |
I personally like SD cards. Extremely small, very small footprint on the PCB, and you can talk to them via SPI. If you're using the Atmel 89S8252 you already have SPI in the hardware so talking to an SD card is a breeze. I assume it's slower than a CF card, but if we're talking small packets of data as seems to be the case in this project then the SD card would be more than adequate.
I believe I got 8k per second when implementing bit-banged SPI to the SD card with the 89S8252. If you implement it with the on-chip SPI you could go significantly faster. Regards, Craig Steiner |
| Topic | Author | Date |
| Simple Filesystems | 01/01/70 00:00 | |
| Here is an idea... | 01/01/70 00:00 | |
| Thought about an EEPROM but... | 01/01/70 00:00 | |
| if only add data and read it all at once | 01/01/70 00:00 | |
| How big? | 01/01/70 00:00 | |
| FAT might be overkill... | 01/01/70 00:00 | |
| Another reason not to use FAT. | 01/01/70 00:00 | |
| I agree | 01/01/70 00:00 | |
| I found this too. | 01/01/70 00:00 | |
| Good! | 01/01/70 00:00 | |
| Are you sure? | 01/01/70 00:00 | |
| Hmmm | 01/01/70 00:00 | |
| few thoughts | 01/01/70 00:00 | |
| SD cards | 01/01/70 00:00 | |
| I got three | 01/01/70 00:00 | |
| if what you are saying is | 01/01/70 00:00 | |
| Hard work? | 01/01/70 00:00 | |
I agree | 01/01/70 00:00 | |
| If you decide on FAT support.... | 01/01/70 00:00 | |
| Recent Article | 01/01/70 00:00 |