Read tag data (28h), Gen2 command and response – ThingMagic M5e-Compact User Manual

Page 240

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Appendix D: Deprecated and Modified Commands

Read Tag Data (28h)

The Read Tag Data command reads data from the tag. Because each protocol has
different formats for reading / writing data, the address field may have different meanings.

The general format for the Read Tag Data

command is shown in the following example.

The tag ID field can be either 8 or 12 bytes, depending on whether it is a 64-bit or 96-bit
tag.

GEN2 Command and Response

The Read Tag Data command for the GEN2 protocol has the following format. This
example reads the first 16-bit word of the EPC stored in a tag using the GEN2 protocol
Read

command.

Read Tag Data Command

The MemBank, Address, and WordCount fields correspond to the

MemBank

,

WordPtr

,

and

WordCount

arguments to the GEN2 protocol Read command, respectively. The

MemBank options are listed in the

Write Tag Data (24h)

section of this document.

Refer to the EPC Global GEN2 protocol specification for more details about the tag
memory map.

FF

M + 6

28

03 E8

00

00

00

10

M bytes

??

??

SOH

Length

OpCode

Timeout (ms)

Address

Tag ID (M bytes)

CRC

FF

08

28

03

E8

01

00

00

00

02

01

??

??

SOH

Length

OpCode

Timeout (ms)

MemBank

Address

WordCount

CRC

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