RFID Communications

To exit Continuous Read mode, send the command with the read length variable set to 0 as shown below. The value of the other variables are not considered.

Command from Host

MSB

LSB

Remarks

AAH

0DH

Perform Command D

 

 

 

00H

01H

Record Length

 

 

 

00H

00H

Read 0 bytes/end mode

 

 

 

00H

02H

2-second Timeout

 

 

 

FFH

FFH

Message Terminator

 

 

 

Response from Controller

MSB

LSB

Remarks

AAH

0DH

Command Echo

 

 

 

FFH

FFH

Message Terminator

 

 

 

6.4.7 ABxS Command 14H: Get Memory Status

DESCRIPTION

Returns the lock status of the specified blocks of data.

DISCUSSION

This command can be used to determine whether blocks of tag memory are locked (marked “read-only”). The number of specified contiguous blocks are addressed from the specified first block. The response from the controller gives the status of each block through a one-word value. The value is 0000H if the block is unlocked, 0001H if locked.

Field

Content

Header

AAH

 

 

Command

14H

 

 

First Block

Two-byte value for the first block whose lock status will be interrogated

 

 

Number of blocks

Two-byte value for the number of blocks whose lock status will be interrogated

 

 

Timeout

Timeout value given in 1 ms units (001EH - FFFEH)

 

 

Message Terminator

FFFFH

 

 

Response from controller:

Field

Content

Header

AAH

 

 

Command Echo

14H

 

 

Status

One word represents the status of each block 0000H indicates that the block is not

 

locked 0001H indicates that the block is locked

 

 

Terminator

FFFFH

 

 

LRP2000 Passive Reader/Writer

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Escort LRP2000 manual ABxS Command 14H Get Memory Status, Response from controller, Field Content