AM625: MMC0(eMMC) Pull Up

Hello Mari Tsunoda

Thank you for the query.

Mari Tsunoda said:

SK-AM62B-P1 schematic shows 49.9kΩ

The 49.9K resistor has specific tolerance requirements and hence we have been recommending 47K to use a standard tolerance resistor.

See below. This is the AM62L EVM

We are in the process of updating the Sk-AM62B-P1.

Please refer below SD card specifications

/cfs-file/__key/communityserver-discussions-components-files/791/Phison-eMMC-153-Ball-pSLC-SPEC_5F00_v1.4-_2800_1_2900_-_2800_2_2900_.pdf

You could use 10K but there is a caution note that the pullup value may not meet the eMMC specifications in case the internal pulls are enabled unexpectedly.

With 47K, the parallel pullup value is still within the eMMC recommendation.

Regards,

Sreenivasa