Im curious why - Page 2

Altera_Forum · ‎08-30-2007

Noone had any advice about running Cyclone II based boards off rechargeable batteries? Is there something I dont know where it's a bad idea?

Altera_Forum · ‎09-14-2007

If you want to go with an easy to use switcher, you can use the point of load modules. One made for FPGA's is the muRata MPDTY01 www.murata.com/power/short/f07e1.pdf . A whole range of options for Altera FPGA's is found at

www.murata.com/power/fpga/altera/index.html

including a power supply design reference guild for Altera FPGAs.

Altera_Forum · ‎09-17-2007

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If you want to learn a little more about cyclone devices for battery powered applications, you may want to try to look at this board that linear tech and arrow put together:

http://www.fpgajournal.com/articles_2007/20070904_proof.htm

this is a nice little write up from fpga journal.

good luck,

guano

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Thanks for the pointer. Does anymore here happen to know exactly which device is used for the CellularRAM? I'm particularly curious whether they picked a muxed Addr/Data version.

Tommy

Altera_Forum · ‎10-22-2007

The CellularRam utilized in the LPRP is referenced by the hyperlink below.

It has separate address, data and control busses. It can handle about 135 Mbyte/sec transfer rate and automatically defaults to < 200uW of powerdraw when it is not being accessed. It has both a simple assynchronous (SRAM like) interface or a higher performance burst mode interface. The LPRP uses it in burst mode.

http://www.micron.com/products/partdetail?part=mt45w4mw16bcgb-701%20wt (http://www.micron.com/products/partdetail?part=mt45w4mw16bcgb-701%20wt)

Altera_Forum · ‎10-23-2007

Thanks (again) Skravats. I actually attended the Arrow event and have the LPRP in hand.

While I have issues with the Arrow event, the LPRP board is pretty cool. Had the LPRP been 1/3 - 1/4th the size, it could have been immediately useful besides just being a dev kit. Hopefully we'll see more battery power dev kits in future.

Altera_Forum · ‎10-29-2007

I want you to know I've returned to this project and still intend to finish it. I still appreciate all your good advice, I am now working on getting one of those small text LCDs to work with my project before anything else, then I will return to this problem, thanks for your help.