USB HOST to program the NAND Flash using mfgtool

[Ramtry]

Hi,

My firmware application involves transferring of data between pen drive which connected on EVK board USB 1 Host . Currently using MgfTool to flash the program into NAND Flash chip by connecting the usb cable between USB 0 Device of board and PC. Still wonder, is it possible to use both flashing of nand flash chip and pendrive data transfer using one USB channel  may be USB0 or USB1 ?  For instance, program the NAND flash IC using USB0  and use the same USB0 to my application to interface pendrive.

Thanks,

RAM

[Yuri]

   The MFG tool may use only USB OTG (USB0) of the i.MX28.

There are no tools from Freescale to flash NAND, using USB Host of the i.MX28, sorry.

   Next, generally it is possible to write NAND and a sticker, connected to USB Host of i.MX28,

via the MFG, but we do not have an example for USB sticker writing.

   Also it is possible to use the i.MX28 USB OTG in both modes (Host and Device),

but - of course - not simultaneously.  

[Ramtry]

Hey Yuri,

Thanks for your post. I am multiplexing the USB channel 0 and 1 with the help of bilateral switch (cd4016). Whenever i want to program then placing the jumper. After programming remove the jumper. Attached the schematic .

thanks

ram

[Yuri]

I have some doubt regarding frequency parameters of the switch (I am afraid it cannot guarantee 480 MHz passing).
It would be better to use special USB solutions, say as following :

http://www.ti.com/lit/ds/symlink/ts3usb221.pdf

[Ramtry · Accepted solution]

Hi Yuri,,

multiplexing of USB 0 and USB 1 are done successfully. am posting the schematic

thanks

ram

[Ramtry]

Hi Yuri,,

You are absolutely right about the frequency. I tested by giving the 400 MHz to the input of 4016 and out is very distorted. So, i came up with new IC TS3USB30EDGSR - TEXAS INSTRUMENTS - IC, SWITCHES, MULTIPLEXERS | Farnell United Kingdom

Moreover this IC has ESD protection as well.

I received this IC and gonna test it and update here,,  I hope finger cross

Thanks,

RAM