FRAM as memory expansion

[xar]

Hi,
why don't you take a look at the latest FRAM chips from Ramtron?
They should make a great memory expansion for any SPI equipped MCU, like IsoPod for example.


Giuseppe Marullo

[nmitech]

Good info, thanks Giuseppe!

[Pacetech]

Does anyone have some Forth code to interface to these chips? Or even any other SPI Serial EEPROMs?

[CIM]

Is there a way to save information from Isopod on a key and read back on computer?

[RMDumse]

Originally posted by CIM
Is there a way to save information from Isopod on a key and read back on computer?

How do you mean? For instance, there is data flash that can be programmed and a word added to report that programmed value. Is that your sense of a "key"?

[RMDumse]

Originally posted by Pacetech
Does anyone have some Forth code to interface to these chips? Or even any other SPI Serial EEPROMs?

There is support for the SPI now in the language, and it works pretty well. See the new manual concering SPI0 and such set ups as MASTER, BAUD, etc.

[CIM]

The information need to be saved on a removable media like a USB-Key (small package with spi fram chips and connector). On the computer side i can place another Isopod to send the spi-fram information to the serial port. Is there a small board with spi-fram or spi-eeprom available?

[Pacetech]

CIM ->

Rogue Robotics ( http://www.roguerobotics.com ) has a uMMC, which is a SD memory card to serial (logic level, not RS-232 Level) module. It uses any SD card - up to 1GB, maybe more.

The problem with it is that is is very slow, 3200 bytes/sec read speed (continuous reading) and because of delays (on the order of 100ms for writing), its not very usuable for real time data-storage in my applicaion.

It appears they are working on revising the firmware to better the speeds.

RMDumse ->

Where is this "new manual"? On the download page, the latest POD manual is the ServoPod USB. The others haven't been updated since 03.