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Application Tag Commands

Command Set 145

BlockWrite Command Fields

An example BlockWrite single tag command is:.

Field Value Notes

Length [1 byte] Number of bytes in the command following the OpCode.

OpCode 0x2D BlockWrite

Timeout [2 bytes]

Ignored when used as an embedded command for

Tag Inven-

tory With Embedded Operations

Chip Type 0x00 Standard Gen2 2.0 tags

Tag Singulation Fields

| Select Option

[1 byte] bit 6 (x1xx xxxx | 0x40) must be set, indicating a 2-byte sub

command follows this byte, and before the remaining

Tag Sin-

gulation Fields

Sub Command 0x00C7 • 0x00C7 - BlockWrite

Access Password [4 bytes] The tag’s Access Password for writing to write locked memory

Tag Singulation Fields

| Select [Address,

Data Length, Data]

[n bytes]

The remaining fields from the Tag Singulation Fields

Note: Optional depending on the value of Select Option.

WriteFlags 0x00 Reserved for future use.

MemoryBank [1 byte] Memory bank who’s data will be erased. Standard Gen2 field

values:

• 0x00 = Reserved

• 0x01 = EPC

• 0x02 = TID

• 0x03 = User

WordPointer [4 bytes] Starting, zero-based, 16-bit word address of the MemoryBank

to be written.

WordCount [1 bytes] Number of 16-bit words to be written.

Data [2*WordCount

bytes]

Data to be written

FF 09 2D 03 E8 00 44 00 C7 11 22 33 44 00 00 00 78 08 34

SOH Length OpCode Timeout (ms) Chip

Type

Option Sub

Cmd

Access Password Select Data Address

(bits)

Select

Data

Length

(bits)

Select

Data

1 2 ... 140 141 142 143 144 145 146 147 148 149 150 ... 251 252

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