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| ratio between vcc and vccq http://forum.hddguru.com/viewtopic.php?f=27&t=36338 |
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| Author: | alemmat [ January 23rd, 2018, 10:07 ] |
| Post subject: | ratio between vcc and vccq |
Hello Vnr users, how are you all ? I have a case is a pendrive and the memorie is very damage after all night trying to correct one dump only correct half with 74% of error. Now the voltages in the reader are settings in vcc 2.3 V and Vccq 3.3 V. And now i am thinking to low the voltage to 1.8v of vcc but is necessary low the Vccq to and in a specific ratio between the 2 voltages. Thanks very much My best regards |
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| Author: | HaQue [ January 23rd, 2018, 11:35 ] |
| Post subject: | Re: ratio between vcc and vccq |
depends on the chip. I wouldn't go lower thank 2.2 for vcc... never seen good results lower. Maybe read retry needs to be tinkered with, or vcc applied to other pins. have you tried lowering vccq and raising slightly vcc You should add the chip part number and ID. Are the pins nice and clean? cheers |
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| Author: | alemmat [ January 26th, 2018, 11:10 ] |
| Post subject: | Re: ratio between vcc and vccq |
HaQue thanks very much to answer my question!!!!! is possible improve the reading lowering the vccq and raise up vcc ? i belive the reading impreve when the voltage of the core are lower Thanks very much my best regards |
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| Author: | HaQue [ January 26th, 2018, 12:12 ] |
| Post subject: | Re: ratio between vcc and vccq |
Yes you can try that too. just don't raise VCC too much. You should add the chip part number and ID to this post. |
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| Author: | alemmat [ January 26th, 2018, 12:52 ] |
| Post subject: | Re: ratio between vcc and vccq |
the id is 983A98A376 and the part number is fd32b08uch1-49 thanks very much HaQue my best regards |
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