| ??? 07/17/07 12:07 Read: times |
#141960 - Atmel flash Responding to: ???'s previous message |
According to my short experience with DS89C430 (16K flash), it behaves like Farshad said: you can write in any upper 8K block byte, but you need to erase the entire block to change one single byte. It is not very usefull for permanent variable storage. This particular chip has 1K internal xram that could be used eventually as write buffer.
In former times I used Atmel AT89S52 with an external serial EEPROM chip to keep some permanent data. Later I changed to AT89S8252, that allow random access to internal 2K data eeprom, in a byte-to-byte fashion. Also, I made some tries with AT89S8253, which allows single byte access and fast new 32 byte page writing. Daniel |
| Topic | Author | Date |
| Atmel DataFlash | 01/01/70 00:00 | |
| Pages and blocks | 01/01/70 00:00 | |
| 26xxx series vs. 45xxx series | 01/01/70 00:00 | |
| Oops! | 01/01/70 00:00 | |
| Atmel flash | 01/01/70 00:00 | |
| Missed the point? | 01/01/70 00:00 | |
| Ya, missed the point | 01/01/70 00:00 | |
| Such is the world of flash | 01/01/70 00:00 | |
| More capacity... | 01/01/70 00:00 | |
| A, possibly silly, idea | 01/01/70 00:00 | |
| RAID on EEPROM...?! | 01/01/70 00:00 | |
| Access time...? | 01/01/70 00:00 | |
If reads are the issue | 01/01/70 00:00 | |
| RE: Random write and capacity | 01/01/70 00:00 | |
| Was stuck in 26xxx series! | 01/01/70 00:00 |