strange 24lc512 eeprom problem

[sayzer]

Writing to LC eeproms requires 2ms to 5ms delay after each write.

You are sending a block of bytes at one shot.
Try sending(writing) them single by single and have 5ms pause after each write.
Or, you may want to use page write feature for one whole 128-byte page (for LC512) and have one pause after each page.
check this link :
http://www.picbasic.co.uk/forum/show...8811&highlight=

[cluster]

hi
thanks all for your reply
problem solved... i did two things:
1. started to write 128 locations in one shot instead of 28 as suggested by sayzer
2. i was using usb port for power supply so i changed it as suggested by kenif
and then i tested as suggested by demon... issue vanished..
once again thank you all.