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For English speaking users => Recovery USB Flash Drive => Тема начата: juan503 от 10 Декабря 2010, 00:49:21

Название: re not recognized device
Отправлено: juan503 от 10 Декабря 2010, 00:49:21
Hi - sorry for repeated question
for those usb disk drives which shows when connected "The usb device not recognized"
sometimes crossing 29-30 MEMORY CHIP's pins not working-i was tried other pins you told but not work-what happened and what happen when did this ?
i have alcor6986 controller with micron Memory Chip
Regards
Название: Re: re not recognized device
Отправлено: _ANDY_ от 15 Декабря 2010, 19:40:54
Only harware replacing contrroller chip can fix this problem, may be.
Название: Re: re not recognized device
Отправлено: darkmancubano от 28 Января 2011, 19:32:46
Only harware replacing contrroller chip can fix this problem, may be.
you don´t need replace anything, the solution is single, Need jumper pins 7 and 8 of the flash chip in your flash drive and connect it to pc, when you recognize it, you quickly remove bridge "This is done when it shows the message" Unrecognized device ", now in then you can pass the tool of the same.
Greetings from Cuba and I hope will be helpful.
Название: Re: re not recognized device
Отправлено: _ANDY_ от 29 Января 2011, 19:55:42
darkmancubano, thank you.
Have you checked on different controllers?

7 pin - READY/BUSY OUTPUT
The R/B / R/B1 output indicates the status of the device operation. When low, it indicates that a program,
erase or random read operation is in process and returns to high state upon completion. It is an open drain
output and does not float to high-z condition when the chip is deselected or when outputs are disabled.

8 pin - READ ENABLE
The RE input is the serial data-out control, and when active drives the data onto the I/O bus. Data is valid
tREA after the falling edge of RE which also increments the internal column address counter by one.
Название: Re: re not recognized device
Отправлено: darkmancubano от 28 Февраля 2011, 19:21:44
darkmancubano, thank you.
Have you checked on different controllers?

7 pin - READY/BUSY OUTPUT
The R/B / R/B1 output indicates the status of the device operation. When low, it indicates that a program,
erase or random read operation is in process and returns to high state upon completion. It is an open drain
output and does not float to high-z condition when the chip is deselected or when outputs are disabled.

8 pin - READ ENABLE
The RE input is the serial data-out control, and when active drives the data onto the I/O bus. Data is valid
tREA after the falling edge of RE which also increments the internal column address counter by one.

I Chequed in diferent controllers and work to me, only don´t work if the chip is broken, in this case, and only in this case is necesary  a replacement of a chip controller, (Another case y a flash broken, can be replacer for another similar).
Grettings from Cuba
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