Hi!
I've been trying to dump an EMMC chip using EMMC_ISP 2022 VER 1.0 adapter.
Every time I try to identify the chip I get error 27.
Same thing happens both in VCC3.3/VCCQ1.8, VCC1.8/VCCQ1.8 and VCC3.3/VCC3.3 modes.
I've tried both internal and external power.
To rule out a problem with the target board I tried connecting to a plain SD card in 1bit mode - same problem, error 27.
Can you help me, please?作者: martian 时间: 2023-1-30 11:18
I'm using the latest version of the software - 12.45.作者: martian 时间: 2023-1-31 12:05
So I've taken closer look at the adaptor and I see that there's a 1 ohm pull up on the CMD mosfet, that seems very high. The pull down also doesn't seem to get disabled for reading.
Is this board meant for some high power MMC that can drive that mosfet low? Otherwise I'm not sure I understand how this can ever work.作者: admin 时间: 2023-2-1 15:11
Oh, you're right! I measured it and it is in fact 10kOhm, the marking is just "010" which is usually 1 ohm.Do you know why I might be getting error 27 then?
