Read out eMMC device life time

The eMMC provides an estimated indication about the device life time that is reflected by the averaged wear out of memory relative to its maximum estimated device life time.

Please Note:
The following instructions have been tested on the

TQMa6x BSP REV.113
TQMa8Xx BSP REV.001
TQMa6ULx BSP REV.106
TQMLS102xA BSP REV.109

Print out eMMC device life time

Boot Starterkit
Use command $mmc extcsd read <device> to print out:

eMMC Life Time Estimation A
eMMC Life Time Estimation B
eMMC Pre EOL information

Example

root@MBa6x:~ mmc extcsd read /dev/mmcblk0
eMMC Firmware Version: 73103517%P
eMMC Life Time Estimation A [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]: 0x01
eMMC Life Time Estimation B [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]: 0x01
eMMC Pre EOL information [EXT_CSD_PRE_EOL_INFO]: 0x01
root@MBa6x:~

Device life time estimation value for type A and type B

Value	Description
0x00	Not definded
0x01	0% - 10% device life time used
0x02	10% - 20% device life time used
0x03	20% - 30% device life time used
0x04	30% - 40% device life time used
0x05	40% - 50% device life time used
0x06	50% - 60% device life time used
0x07	60% - 70% device life time used
0x08	70% - 80% device life time used
0x09	80% - 90% device life time used
0x0A	90% - 100% device life time used
0x0B	Exceeded its maximum estimated device life time
others	Reserved

Pre EOL info value

Value	Pre-EOL Info	Description
0x00	Not Defined
0x01	Normal	Normal
0x02	Warning	Consumed 80% of reserved block
0x03	Urgent
0x04 ~ 0xFF	Reserved

Disclaimer
TQ-Systems GmbH provides the Board Support Packages (BSP) free of charge. The software included in the shipment has been configured individually for the starter kits. The software is only intended to evaluate the module. The use of the Board Support Packages (BSP) is only allowed within the scope of functionality described by TQ-Systems GmbH. TQ-Systems GmbH does not accept any liability for all further changes of the Board Support Package and for any damage resulting from its use.