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 Post subject: DR off a Compact Flash with AND Memory chips.
PostPosted: October 30th, 2018, 19:03 
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Joined: May 26th, 2017, 12:52
Posts: 17
Location: Canada
I have a Compact Flash card with markings:

Chip:
HN29W25611T-50H

Controller:
HN29W256SH02

The CF was able to be detected by the computer, but extracting any data was impossibly slow.


I found a datasheet for this chip:
https://www.digchip.com/datasheets/down ... 25611T-50H

What does AND type Flash Memory mean?

According to the datasheet, the pinouts for this chip are not the standard configuration for TSOP48, most likely because it was made before ONFI specifications.

Is chipoff recovery possible?
Would I need to purchase a different reader than FE, or ACELab? Or would I be able to connect the pin connections to the proper locations to read it normally?

Thanks!


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 Post subject: Re: DR off a Compact Flash with AND Memory chips.
PostPosted: October 30th, 2018, 19:50 
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Joined: September 8th, 2009, 18:21
Posts: 10949
Location: Australia
Have you tried warming or cooling the chip?

If there is a 3.3V LDO regulator, perhaps you could tweak the output voltage? I could possibly help with that.

_________________
A backup a day keeps DR away.


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 Post subject: Re: DR off a Compact Flash with AND Memory chips.
PostPosted: October 31st, 2018, 14:33 
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Joined: May 26th, 2017, 12:52
Posts: 17
Location: Canada
Hi, thanks for your reply.
fzabkar wrote:
Have you tried warming or cooling the chip?

I tried warming and cooling the chip, no success.
fzabkar wrote:
If there is a 3.3V LDO regulator, perhaps you could tweak the output voltage? I could possibly help with that.

On the board, I do see ICs that appear to be LDOs, but the chips have already been removed from the board.


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 Post subject: Re: DR off a Compact Flash with AND Memory chips.
PostPosted: October 31st, 2018, 20:04 
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Joined: September 8th, 2009, 18:21
Posts: 10949
Location: Australia
It's probably too late now, but here is a simple adjustable regulator circuit that can be built for less than US$5. It provides an output voltage range of 2.5V to 3.5V.

Code:
            LM1117-ADJ
              ____
  Vout       |    |  Vin (+5V)
  o-+--------|LDO |---o
    |        |____|
   .-.  R1     |
   | | 120R    | adj
   | |         |
   '-'   .-----+
    |    |     |
    |   _V_    |
    '--|___|---+
               |
        RV1   .-.
       100R   | |  R2
              | |  220R
              '-'
               |
              ===
              GND

Vreg = 1.25V for LM1117-ADJ

Vout = Vreg x (1 + R2 / (R1 + RV1))

    = +2.5V (min) / +2.87V (mid) / +3.54V (max)

_________________
A backup a day keeps DR away.


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