Поиск

[juan503]

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

[_ANDY_]

Only harware replacing contrroller chip can fix this problem, may be.

[darkmancubano]

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.

[_ANDY_]

darkmancubano, thank you.
Have you checked on different controllers?

Код [Выделить] Expand

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.

Код [Выделить] Expand

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.

[darkmancubano]

darkmancubano, thank you.
Have you checked on different controllers?

Код [Выделить] Expand

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.

Код [Выделить] Expand

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
Yunis Maikel