I2C routine speed

[IT]

Hello,

Used CCS routines for I2C comunications with a 20 Mhz clock, how much time spend each byte in the bus?
I have an application with an EEPROM memory 24C515 and the time is critical. If the speed of the bus I2C is too low, is there any other component EEPROM or Flash more quick than 24Cxx EEPROM family?

A lot of thanks,
___________________________
This message was ported from CCS's old forum
Original Post ID: 13472

[PCM programmer]

:=Hello,
:=
:=Used CCS routines for I2C comunications with a 20 Mhz clock, how much time spend each byte in the bus?
:=I have an application with an EEPROM memory 24C515 and the time is critical. If the speed of the bus I2C is too low, is there any other component EEPROM or Flash more quick than 24Cxx EEPROM family?
----------------------------------------------------------

I think you really mean 24LC515, not 24C515.

----

Ramtron has EEPROM with a fast write time, and a fast interface.
This chart shows the bus speed of the various chips:
<a href="http://www.ramtron.com/products/datasheets.htm" TARGET="_blank">http://www.ramtron.com/products/datasheets.htm</a>

This appnote compares the time required to access a Ramtron
eeprom, vs. a normal eeprom.
<a href="http://www.ramtron.com/products/appnotes/24C16adv.pdf" TARGET="_blank">http://www.ramtron.com/products/appnotes/24C16adv.pdf</a>

You can use Hardware i2c, and program the SSPADD register for
a higher baud rate, to use with these high-speed eeproms.
Or, you could use SPI.
___________________________
This message was ported from CCS's old forum
Original Post ID: 13473