M24LR04E-R datasheet(43/142 Pages) STMICROELECTRONICS

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M24LR04E-R

RF device operation

Doc ID 022208 Rev 5

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7.2

Commands

The M24LR04E-R supports the following commands:

●

Inventory, used to perform the anticollision sequence.

●

Stay quiet, used to put the M24LR04E-R in quiet mode, where it does not respond to

any inventory command.

●

Select, used to select the M24LR04E-R. After this command, the M24LR04E-R

processes all Read/Write commands with Select_flag set.

●

Reset to ready, used to put the M24LR04E-R in the ready state.

●

Read block, used to output the 32 bits of the selected block and its locking status.

●

Write block, used to write the 32-bit value in the selected block, provided that it is not

locked.

●

Read multiple blocks, used to read the selected blocks and send back their value.

●

Write AFI, used to write the 8-bit value in the AFI register.

●

Lock AFI, used to lock the AFI register.

●

Write DSFID, used to write the 8-bit value in the DSFID register.

●

Lock DSFID, used to lock the DSFID register.

●

Get system info, used to provide the system information value

●

Get multiple block security status, used to send the security status of the selected

block.

●

Initiate, used to trigger the tag response to the Inventory initiated sequence.

●

Inventory initiated, used to perform the anticollision sequence triggered by the Initiate

command.

●

Write-sector password, used to write the 32 bits of the selected password.

●

Lock-sector, used to write the sector security status bits of the selected sector.

●

Present-sector password, enables the user to present a password to unprotect the

user blocks linked to this password.

●

Fast initiate, used to trigger the tag response to the Inventory initiated sequence.

●

Fast inventory initiated, used to perform the anticollision sequence triggered by the

Initiate command.

●

Fast read single block, used to output the 32 bits of the selected block and its locking

status.

●

Fast read multiple blocks, used to read the selected blocks and send back their value.

●

ReadCfg, used to read the 8-bit Configuration byte and send back its value.

●

WriteEHCfg, used to write the energy harvesting configuration bits into the

Configuration byte.

●

WriteDOCfg, used to write the RF WIP/BUSY pin configuration bit into the

Configuration byte.

●

SetRstEHEn, used to set or reset the EH_enable bit into the volatile Control register.

●

CheckEHEn, used to send back the value of the volatile Control register.

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