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标题: Probleme with emmc with vccq =1,8v cant detect with supp or isp. [打印本页]
作者: tahar191    时间: 2020-7-29 22:59     标题: Probleme with emmc with vccq =1,8v cant detect with supp or isp.

Hi, problem with emmc have vccq - 1.8v, can not detect, it gave me the initial emmc and failed - error: 00FF8081, when I use an external 1.8v, it tries to read the information, read cid csd successfully but error to read ecsd and failed - no data response state: I tried to measure vccq either in isp or on the emmc support , it is either absent or it is of low value -max 1.4v-.
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作者: admin    时间: 2020-7-30 13:03

Maybe it's your adapter problem.   1.8V is powered by U4  LDO   XC6206-1.8V on EMMC adapter.

check IC :XC6206-1.8V

when choice VCC3.3/VCCQ1.8V . programmer's VCCQ PINS(2# 3# of P2) is Is high resistance state.and 1.8V power by XC6206.


if choice VCC3.3/VCCQ3.3V   VCC and VCCQ powered by programmer.

this is EMMC adapter SCH.
EMMC_Sch.jpg
2020-7-30 13:21



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作者: tahar191    时间: 2020-7-30 22:48

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2020-7-30 22:33



think you , problem resolu 👍👍👍👍👍 after checking ic6202 , all ok reading and programming .






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