MB89R112 datasheet(22/49 Pages) RAMXEED

22 / 49 page

MB89R112

DS411-00004-3v0-E

1. Description of Mandatory Commands

1-1. Inventory command

The Inventory command executes the anti-collision sequence.

If an error is detected during execution of this command, a response indicating the error shall not be returned.

The Inventory_flag (bit 3) must be set to “1”.

When the AFI_flag (bit 5) in the Inventory command frame is set as “1”, the response shall be returned in

the following cases.

• The AFI value of the transponder is in accord with the optional AFI value.

• The 4 bits value MSB of the Optional AFI is “0H”, and the 4 bits value LSB of the Optional AFI is in

accord with the 4 bits value LSB of the transponder.

• The 4 bits value LSB of the Optional AFI is “0H”, and the 4 bits value MSB of the Optional AFI is in

accord with the 4 bits value MSB of the transponder.

• The optional AFI value is “00H”.



Request

[Request from the reader/writer to the transponder]



Response

[Response from the transponder to the reader/writer]

1-2. Stay Quiet command

On receiving the Stay Quiet command, the transponder enters the quiet state. The transponder does not

return any responses, including an error indication.

In the quiet state, the transponder does not execute any request for which the Inventory_flag (bit 3) is set

to “1” and executes only a command for which the Address_flag (bit 6) is set to “1”.

The transponder exits the quiet state only in the following cases:

• The transponder enters the power-off state.

• The transponder receives the Select command and enters the select state.

• The transponder receives the Reset to Ready command and enters the ready state.



Request

[Request from the reader/writer to the transponder]



Response

[Response from the transponder to the reader/writer]

No response

SOF

Flag

Command

(Inventory)

Optional AFI Mask length Mask value

CRC

EOF

8 bits

8 bits (“01H”)

8 bits

0 to 64 bits

16 bits

SOF

Flag

DSFID

UID

CRC

EOF

8 bits (“00H”)

8 bits

64 bits

16 bits

SOF

Flag

Command

(Stay Quiet)

UID (necessary)

CRC

EOF

8 bits

8 bits (“02H”)

64 bits

16 bits

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