??? 05/01/10 19:28 Read: times |
#175593 - Be reasonable. Responding to: ???'s previous message |
Ok. You have three options.
1. 128ms = write 32 bytes one at a time 2. 1ms = compare 32 bytes and find unchanged. 3. 5ms = compare 32 bytes and write page The AT89S8253 has 2048 byte of EEPROM. So the 64 pages would be: 1. 8.2 seconds 2. 64 ms 3. 320ms In practice, you would be comparing some value between 64 and 320ms with the 8192ms. Yes. There is never anything for free. You can hardly write the whole 2k when you detect a power loss. But a smaller # of bytes could be managed. David. |
Topic | Author | Date |
help regarding 89s8253 | 01/01/70 00:00 | |
i can,t understand what is the problem | 01/01/70 00:00 | |
Either write less data to EEPROM or switch to 8-bit F-RAM | 01/01/70 00:00 | |
i CAN understand what is the problem...... | 01/01/70 00:00 | |
EEPROM need not be too slow. | 01/01/70 00:00 | |
'too' is a very relative word | 01/01/70 00:00 | |
I use to work with AT89S8253 | 01/01/70 00:00 | |
do not forget | 01/01/70 00:00 | |
Not quite true | 01/01/70 00:00 | |
maybe not, but ... | 01/01/70 00:00 | |
Be reasonable.![]() | 01/01/70 00:00 |