MB89R119B datasheet(16/46 Pages) RAMXEED

16 / 46 page

MB89R119B

DS411-00002-4v0-E



Response Error code definitions

8. Anti-Collision Algorithm

The MB89R119B executes an anti-collision sequence loop based on ISO/IEC 15693.

The purpose of the anti-collision sequence is to make an inventory of the transponders present in the reader/

writer field by their unique ID (UID).

The reader/writer issues an Inventory command to transponders, and some transponders return responses

while other transponders do not respond, according to the algorithm described in "10. Execution of Inventory

Command by a Transponder".

9. REQUEST PARAMETER



Request Parameter Settings

Set the reader/writer as follows before issuing the Inventory command.



The Nb_slots_flag (bit6), which is a request flag, is set to the desired value :

“0” : 16 slots (for plural transponders)

“1” : 1 slot (for single transponder)



A mask length and a mask value are added after the command code.



The mask length indicates the significant bits of the mask value.



The mask value is integer bytes of data, transmitted beginning with the least bit. If the mask length is not

a multiple of 8 (bits), 0 is padded on the MSB side of the mask value so that the data is in units of bytes.

The following figure shows an example of the mask value with padding. Since the mask length is 12 bits,

the mask value is padded with 4 bits on the MSB side so that the mask data is in units of bytes (2 bytes =

16 bits in this case).

If the AFI_flag (bit 5) in the request flags is set in the format explained in "6. Request Format", an AFI field

is added to the format. The command ends with transmission of an EOF signal as described in "1. Commu-

nication from Reader/Writer to Transponder". Thereafter, processing in the first slot starts immediately. To

proceed to the next slot, the reader/writer sends an EOF signal.



Format of the Command

Error code

Meaning

“01”

The command is not supported. Example: Command code error

“02”

The command is not recognized. Example: Format error

“03”

The command option is not supported.

“10”

The specified block is not available (does not exist).

“11”

The specified block is already locked and thus cannot be locked again.

“12”

The specified block is already locked, and its contents cannot be changed.

“13”

The specified block was not successfully programed (a write verify error occurred).

“14”

The specified block was not successfully locked (a lock verify error occurred).

SOF

Flags

Command code Optional AFI Mask length Mask value

CRC

EOF

8 bits

0 to 64 bits

16 bits

MB89R119B Datasheet(PDF) 16 Page - RAMXEED LIMITED

MB89R119B Datasheet(HTML) 16 Page - RAMXEED LIMITED

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

Datasheet Descarga

Enlace URL