Changes between Version 30 and Version 31 of MMC


Ignore:
Timestamp:
05/13/2024 09:16:09 PM (6 months ago)
Author:
Tim Harvey
Comment:

add additional details about emmc v4+ specification

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  • MMC

    v30 v31  
    4444[=#emmc-partitions]
    4545=== eMMC Partitions
    46 eMMC devices are partitioned into several hardware partitions but only one can be selected at a time:
    47  - BOOT - one or more small partitions intended for boot firmware (eMMC 4.3 spec requires 2 boot and 1 user partition)
    48  - RPMB - Replay Protected Memory Block - intended to store secure data (ie DRM content protection keys) (eMMC 4.4 spec adds the requirement of an RPMB partition)
    49  - USER - a large partition intended for general storage
     46eMMC v4+ devices are partitioned into several hardware partitions but only one can be selected at a time:
     47 - Boot Area Partitions - 2 small equal sized partitions intended for boot firmware
     48 - Replay Protected Memory Block (RPMB) - intended to store secure data (ie DRM content protection keys) (eMMC 4.4 spec adds the requirement of an RPMB partition)
     49 - General Purpose Partitions - 4 optional partitions that can be configured
     50 - User Area Partition - a large partition intended for general storage
     51
     52The specification requires that v4+ devices by default have 2 boot partitions, 1 rpmb partition, and a user partition with the possibility of configuring up to 4 general purpose partitions (using storage from user).
    5053
    5154Notes: