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Old 04-17-2014, 19:18   #1 (permalink)
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eMMC adapter question to vcc, vccq and 3.3V


I have this eMMC adapter from Multi-Com and on this adapter there is for power 1.8V and 2.8V (see picture in attachment) to solder on pcb.

On some eMMC pinouts i see vcc, vccq and also 3.3V (as an example i have put the pinout of the N8000 to the attachment)

My question is:
from adapter pin 1.8V to which pin of vcc, vccq and 3.3V i shall solder?
the same question with adapter pin 2.8V.

or is it:

1.8V = vccq
2.8V = vcc
? = 3.3V

i hope to get an answer as soon as possible,
br
Attached Images
File Type: jpg N8000_pinout.JPG (82.1 KB, 1096 views)
File Type: jpg 20140417_200716.jpg (595.3 KB, 1104 views)
File Type: jpg 20140417_200828.jpg (702.7 KB, 790 views)
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Old 04-17-2014, 22:58   #2 (permalink)
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Hi , there to power lines:

VCC- 2,8...3.3V thats are minimum and maximum values.
VCCQ - 1,8V Power for IO bus.

So thats funny but truth 2.8V = 3.3V
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Old 04-18-2014, 06:09   #3 (permalink)
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to understand it correctly: as you write 2.8=3.3 this means that my adapter can reach also the maximum value of 3.3V, yes?

br

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Old 04-18-2014, 09:16   #4 (permalink)
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furthermore on the emmc pinout of the samsung N8000 which i have uploaded in the first post shows pins for vcc and 3.3V. according to your answer it is

vcc = 3.3V.

so a mistake in the pinout? vcc is supposed to be vccq? or how is this pinout to understand?

br

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Old 04-18-2014, 10:59   #5 (permalink)
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The emmc device have tolerance , and u can use 2,8v or 3,3 v , these are the tolerance to power up ur ic .
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Old 04-18-2014, 11:55   #6 (permalink)
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thanks. would be great when somebody also clears my last question about the pinout of N8000.

br

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Old 01-03-2019, 20:31   #7 (permalink)
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1,8V ISP =
1,8V CARD=
2,8V CARD=
3,3V IO =

What is means, card or board
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Old 10-08-2019, 05:16   #8 (permalink)
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emmc adapter easy jtag


Last edited by layder; 10-08-2019 at 23:32. Reason: merge posts
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