topic Re: IMX8M mini LPDDR4 ERROR in i.MX Processors

IMX8M mini LPDDR4 ERROR

jianfeichang — Fri, 01 Nov 2019 08:22:36 GMT

imx8m mini LPDDR4 2G samsung，it is error

0x40000000 and 0x80000000 are the same.Write data at address 0x40000000 3,0x80000000 also.

0x50000000 and 0x90000000 are the same.

0x60000000 and 0xa0000000 are the same.

NOW，why？

Re: IMX8M mini LPDDR4 ERROR

igorpadykov — Fri, 01 Nov 2019 11:11:35 GMT

Hi jianfei

reason may be hardware errors (some lines are shorted), Also one

can try to change drive strengths and ODT settings, check if that helps.

Best regards
igor
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Re: IMX8M mini LPDDR4 ERROR

jianfeichang — Fri, 01 Nov 2019 11:32:02 GMT

I have a different situation in the uboot, the address seems to operate independently。

read 0x4000 0000 and 0x8000000 ,The data is the same.

but write 0x80000000 aaaa,and read 0x40000 0000, The data is different.

Re: IMX8M mini LPDDR4 ERROR

igorpadykov — Sat, 02 Nov 2019 04:45:28 GMT

also this may be soldering issue, so one can try to resolder chip.

Best regards
igor