EEPROM Interface

Hi PRP,

Which EEPROM device are you planning to interface with PSoC?

In general, EEPROMs support I2C interface. In that case PSoC should act as an I2C Master and the EEPROM device as a slave.

Some EEPROM devices also have the provision of setting their addresses (last 2 bits or so) externally, so that multiple EEPROM devices can be made available on the same bus thereby increasing the memory available.

To add to my previous comment, there are also SPI based EEPROMs available.

The SPI based EEPROMs can be accessed at a faster rate (typically 3MHz SPI Clock). These EEPROMs may support 8-bit or 16-bit data formats.

PSoC should act as an SPI in this case, with apporpriate mode selected.

 Hi,

I have the old version of the project. I think that this project was created in Creator 1.0 Beta 5.

I don't know when will this Chrome attachment issue would get resolved.

Hi,

I updated the project to the latest Creator version, PSoC Creator 2.2

This project demonstrates the EEPROM interface with an example of an I2C based EEPROM 24C04.

The project is attached with this post.

Hi PRP,

You can update to the latest version, that is, PSoC Creator 2.2

The link to download this version is here.

With the sample rate of 8500, you'll accumulate more than 42K bytes of data in 5 seconds.

You can use external 64KB or 128KB EEPROM to store these samples.

PSOC 3 EEPROM write speed is 1 row in <= 20 mS, a row being 16 bytes.

So effective write speed is <= 800 bytes/sec, too slow for your sample rate.

You could write FLASH onboard -

http://www.element14.com/community/docs/DOC-48049/l/cypress-ce62384--application-note-on-writing-to-internal-flash-in-psoc-3-and-psoc-5

http://www.cypress.com/?app=forum&id=2232&rID=41766

http://www.cypress.com/?rID=44327

Alternatively you could use external NOR FLASH, programming times 256 bytes in 3 mS.

External EEPROM now offered in very fast versions -

http://www.storagenewsletter.com/news/flash/stmicroelectronics-eeprom-m35b32

Regards, Dana.

emFile module can handle the SDCARD. Look at datasheet for config vs

write speeds achievable.

Other solutions -

http://code.google.com/p/psoc3-5-sdcard-library/

Although this is a bootloader could be adapted -

https://github.com/kmmankad/SDBoot

Regards, Dana.