PCB Help & General Circuit Design
PCB Help & General Circuit Design
(OP)
Working on Devoloping a custom Device for the GP2x handheld.
It's uses are a wireless internet provider an SD storage device and have portable power. It Needs to act as a USB hub with these devices "plugged" in. (will be hardwired)
Heres what I need to know. SD to USB.... What do you need , IE.. controllers what else? Also can be purchased in small quantites at mouser or digikey.
It's uses are a wireless internet provider an SD storage device and have portable power. It Needs to act as a USB hub with these devices "plugged" in. (will be hardwired)
Heres what I need to know. SD to USB.... What do you need , IE.. controllers what else? Also can be purchased in small quantites at mouser or digikey.





RE: PCB Help & General Circuit Design
Dan - Owner

http://www.Hi-TecDesigns.com
RE: PCB Help & General Circuit Design
Also you need the file system firmware. SD's want to talk a certain way about the file structure. It would be easiest to locate a package that lets you use SPI to talk to an SD controller that talks to the actual SD. Then you can use any SD, and when plugged into a PC it can directly read and write the same files.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: PCB Help & General Circuit Design
Anyway, you may start with a USB controller, a CPU and your SD memory. Allegro has some SPI/USB converter ICs to pass USB traffic to CMOS levels.
For CPU, you might use any cheap PIC, some AVR/ATmel, ARM or something that suits better your design.
As said before with SD memories, you need some firmware 'drivers' on CPU to drive it and deal with filesystem.
Regards,
Gonzalo
RE: PCB Help & General Circuit Design
Course you will need some software. But its out there...just need to look for it.
RE: PCB Help & General Circuit Design
Good Luck!
Gonzalo
RE: PCB Help & General Circuit Design
You might want to consider the compact flash for speed reasons.