Datasheet

e.MMC 4.51 selected feature overview
• Power Off Notification
The host should notify the device before it powers the device off. This allows the device to better
prepare itself for being powered off. For more details, refer to section 6.6.36 of the JEDEC Standard
Specification NO. JESD84-B451.
• Packed Commands
Read and write commands can be packed in groups of commands (either all read or all write)
that transfer the data for all commands in the group in one transfer on the bus, to reduce
overheads. For more details, refer to section 6.6.29 of the JEDEC Standard Specification NO.
JESD84-B451.
• Boot Partition
EMC210 supports e.MMC 4.51 boot operation modes. Boot partition size is reflected in
BOOT_SIZE_MULT register value in extended CSD.
• Automatic Sleep Mode
If there is no further command issued by the host in 11mS duration, after the previously issued
command is completed, the device enters “Power Saving Mode” to reduce power consumption. The
host does not have to take any action for this to occur. However, if host want to achieve the lowest
sleep current, the host needs to shut down its clock to the memory device. When the host is ready to
access a memory device in sleep mode, any command issued to it will cause devices to exit sleep
mode.
• Sleep (CMD5)
EMC210 may be switched between a sleep state and a standby state by SLEEP/AWAKE (CMD5).
In the sleep state the power consumption of EMC210 is minimized. For more details, refer to section
6.6.21 of the JEDEC Standard Specification No. JESD84-451.
• Enhanced Reliable Write
EMC210 supports enhanced reliable write as defined in e.MMC 4.51 spec. Enhanced reliable write
is a special write mode in which the old data pointed to by a logical address must remain unchanged
until the new data written to same logical address has been successfully programmed. This is to
ensure that the target address updated by the reliable write transaction never contains undefined
data. When writing in reliable write mode, data will remain valid even if a sudden power loss occurs
during programming.
• Sanitize
The sanitize operation is a feature, in addition to Trim and Erase is used to remove data from
EMC210. The use of sanitize operation requires EMC210 to physically remove data from the