emm5.1标准 JESD84-B51

Embedded Multi-Media Card (e•MMC) Electrical Standard (5.1)

1Scope...............................................................................................................................................................12Normative reference......................................................................................................................................13Terms and definitions...................................................................................................................................14System Features.............................................................................................................................................45e•MMC Device and System..........................................................................................................................65.1e•MMC System Overview..............................................................................................................................65.2Memory Addressing........................................................................................................................................65.3e•MMC Device Overview...............................................................................................................................75.3.1Bus Protocol....................................................................................................................................................85.3.2Bus Speed Modes..........................................................................................................................................155.3.3HS200 Bus Speed Mode................................................................................................................................155.3.4HS200 System Block Diagram......................................................................................................................165.3.5HS200 Adjustable Sampling Host.................................................................................................................165.3.6HS400 Bus Speed Mode................................................................................................................................165.3.7HS400 System Block Diagram......................................................................................................................176e•MMC functional description...................................................................................................................186.1e•MMC Overview.........................................................................................................................................186.2Partition Management...................................................................................................................................196.2.1General..........................................................................................................................................................196.2.2Command restrictions....................................................................................................................................216.2.3Extended Partitions Attribute........................................................................................................................216.2.4Configure partitions.......................................................................................................................................226.2.5Access partitions...........................................................................................................................................256.3Boot operation mode.....................................................................................................................................256.3.1Device reset to Pre-idle state.........................................................................................................................256.3.2Boot partition.................................................................................................................................................276.3.3Boot operation...............................................................................................................................................286.3.4Alternative boot operation.............................................................................................................................296.3.5Access to boot partition.................................................................................................................................336.3.6Boot bus width and data access configuration...............................................................................................336.3.7Boot Partition Write Protection.....................................................................................................................346.4Device identification mode...........................................................................................................................36