Datasheet for 24LC256 refer only to erase/write timings..

[arunb]

Hi,

The datasheet for 24LC256 External EEPROM refers only to the Erase/Write cycle time.

I would like to know the read time for 1 byte or is it the same as the Erase/Write cycle ??

Also does the endurance level come down when data is only read (only read cycle)??

thanks
arunb

[Ttelmah]

Read is as fast as you can clock the data.
The speed is limited only by the transaction rate on the bus. Only write/erase cycles take longer than this (hence the data for these).
It is 'implicit' in the text phrasing of the paragraph describing the read cycle, where it says that the data is available on the next clock cycle, after the address is sent, and in the 'read' clock diagram, where it shows the address being clocked into the chip, and the data clocked out, with no delay at all between these operations. There obviously is a time lag between the address arriving, and the data being presented, but this is inside the specifications for the bus timings. Normally tiny (perhaps 10nSec).

Best Wishes

[arunb]

Hi,

Thank you for the reply.

Is the endurance level (100K) affected by read cycles ??

thanks
arunb

[PCM programmer]