According to 24lc256 datasheet EEPROM itself only stores the 64 byte of data In temporary storage I am assuming in RAM then after the master generates = Stop condition then eeprom itself will write all 64 bytes of data. Here is = the copy from the datasheet. This method is good to save CPU time. = Page mode: The write control byte, word address and the first data byte are transmitted to the 24XX256 in much the same way as in a byte write. The exception is that instead of generating a Stop condition, the master transmits up to 63 additional bytes, which are temporarily stored in the on-chip page buffer, and will be written into memory once the master has transmitted a Stop condition. = -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of= Isaac Marino Bavaresco Sent: Wednesday, September 24, 2008 10:21 AM To: Microcontroller discussion list - Public. Subject: Re: [pic:] I2C EEPROM write speed ? Andre Abelian escreveu: > What do you think I need to learn more about EEPROM? > CCS Compiler I am using doesn't support page mode byte mode only. > > thanks > > Andre > > = Write your own routines to deal with the EEPROM (or get someone's else routines). Page writes may speed-up things tens of times (depending on your EEPROM), but only if you write lots of contiguous bytes. If you are writing only sparse bytes then there is little you may do . __________________________________________________ Fa=E7a liga=E7=F5es para outros computadores com o novo Yahoo! Messenger = http://br.beta.messenger.yahoo.com/ = -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist IMPORTANT NOTICE: This notice constitutes Proprietary Rights identification= of this email including all attachments, which is property that is intende= d only for the use of the individual or entity to which it is addressed. I= t also may contain proprietary data or information that is privileged, conf= idential, or otherwise protected from disclosure under applicable law. The= recipient of this data agrees to abide by the United States Export Control= of Technical Data and Equipment under the International Traffic in Arms Re= gulations (ITAR) and Export Administration Regulations (EAR). The recipien= t agrees to abide by these laws and their regulations not only for export a= nd re-export, but for disclosure to non-U.S. citizens. This email does no= t grant or assign rights of ownership in the proprietary subject matter her= ein, nor shall it be construed as a joint venture, partnership, teaming agr= eement, or other formal business relationship. If the reader of this e-mai= l transmission is not the intended recipient or the employee or agent respo= nsible for delivering the transmission to the intended recipient, you are h= ereby notified that any dissemination, distribution, copying or use of this= e-mail or its contents is strictly prohibited. Please notify the sender y= ou received it in error by responding to the e-mail and then permanently de= lete it and all copies of the e-mail immediately, including any copies of i= t in your deleted email folder. -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist