Hi team,
Our customer is developing the system with AM3707, customer is verifying μSD-card I/F at this time. Recently, customer noticed some their prototype-system/application was freeze during Read/Write access at low temperature (0 degree Celsius). When Varistor is removed, this freeze issue was resolved. Customer observed SDIO signals, however, there is not any difference. Customer need to know the reason why this issue resolved when Varistor is removed.
I tried to summarize customer’s report( AM3703_SDcard_ReadWrite_Verification_with_Varistor.pptx ). Can we have any Expert’s comments on this, please?
Also, when only AM3703 chip was cooled down by something like small ice-pack, it seems AM3703 goes freeze. n this case, this freeze issue also was resolved when Varistor is removed.
Your comment on this would be highly appreciated.
best regards,
Miyazaki