Flash memory with USB Interface - Electronic Circuits Projects Diagrams Free

mohandessina · 5th November 2005, 07:53 AM

Hi,
I'm doing a dsp project to rebuild a coded signal so I need to have access(just read) from a memory that contain the signal's data.I 'm thinking to use a flash memory with usb interface or somthing cheap enough with long work age but i have no idea how can i read from a flash memory.

akg · 5th November 2005, 08:30 AM

with proper drivers installed..the OS will consider the flashdrive as a removable drive..and u can access the file system as normal.. is that u want?

mohandessina · 6th November 2005, 06:59 AM

hi,
sorry i think i should explain more about my poroject. i want to rebuil a system with a cpu ro microcontroler(not a computer) so i need to do the hardwere and softwere by myself

Oznog · 6th November 2005, 07:11 AM

There may be no need for USB. Many cheap flash RAM ICs are made with I2C and SPI interfaces which are very easy to access with a microcontroller. USB is more difficult to implement, usually a special uC with hardware USB is needed.

Most types of flash disk cards have a SPI interface in addition to the normal card interface. This is easy to access.

A uC usually has some amount of flash RAM, often 256-1k bytes. Most PICs can also write data into the code space on a block-by-block basis, but the code space is not extremely large either.

If you're building a single board computer, the USB interface may be easier.

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5th November 2005, 07:53 AM	(permalink)
mohandessina	Flash memory with USB Interface Hi, I'm doing a dsp project to rebuild a coded signal so I need to have access(just read) from a memory that contain the signal's data.I 'm thinking to use a flash memory with usb interface or somthing cheap enough with long work age but i have no idea how can i read from a flash memory. __________________ Upper than heaven sina

5th November 2005, 08:30 AM	(permalink)
akg	with proper drivers installed..the OS will consider the flashdrive as a removable drive..and u can access the file system as normal.. is that u want?

6th November 2005, 06:59 AM	(permalink)
mohandessina	hi, sorry i think i should explain more about my poroject. i want to rebuil a system with a cpu ro microcontroler(not a computer) so i need to do the hardwere and softwere by myself __________________ Upper than heaven sina

6th November 2005, 07:11 AM	(permalink)
Oznog	There may be no need for USB. Many cheap flash RAM ICs are made with I2C and SPI interfaces which are very easy to access with a microcontroller. USB is more difficult to implement, usually a special uC with hardware USB is needed. Most types of flash disk cards have a SPI interface in addition to the normal card interface. This is easy to access. A uC usually has some amount of flash RAM, often 256-1k bytes. Most PICs can also write data into the code space on a block-by-block basis, but the code space is not extremely large either. If you're building a single board computer, the USB interface may be easier. __________________ I thought what I'd do was I'd pretend I was one of those deaf-mutes.