Use Cypress Excelon-LP 8-Mbit F-RAM to replace SPI-Flash

JaYe_3798301 · ‎Nov 23, 2018

Hi all,

I am building a USB device which needs to consume as less power as possible.

I was using Fx3s with SPI-Flash to boot the device, and the typical SPI-flash read current is about 10mA, while the F-RAM needs only 10 times less current.

Would it help to reduce the overall power consumption?

As there would be a 8-Mbits F-RAM coming, Is it possible to use it as the booting flash for Fx3S?

Thanks,

Jay

SrinathS_16 · ‎Nov 25, 2018

Hello Jay,

- The Excelon F-RAMs can be used as replacement for the SPI flash devices for booting. Upon looking into the datasheet of the Cypress Excelon F-RAM, the read/write commands are the same as in the case of FX3 supported SPI boot.

- SPI flash devices use the erase command before writing to the memory. But, F-RAMs do not require erasing. The Cypress Control Center issues the command to erase the SPI flash before write operation. The F-RAM ignores the command and hence the write operation will also be successful. In case, you are writing a custom vendor command in your firmware to write to the F-RAM, the erase command coming from the host must be handled without performing any SPI transfer.

Best regards,

Srinath S

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Use Cypress Excelon-LP 8-Mbit F-RAM to replace SPI-Flash

Use Cypress Excelon-LP 8-Mbit F-RAM to replace SPI-Flash

Re: Use Cypress Excelon-LP 8-Mbit F-RAM to replace SPI-Flash