ThingMagic M5e-Compact User Manual
Page 147
Application Tag Commands
Command Set
147
BlockPermaLock Command Fields
Field
Value
Description
Length
[1 byte]
Number of bytes in the command following the OpCode.
OpCode
0x2E
Gen2 Optional Command.
Time Out
[2 bytes]
Command timeout in milliseconds.
Chip Type
0x00
Gen2 2.0 Tags with BlockPermalock support
| Select Option
[1 byte]
bit 6 (x1xx xxxx | 0x40) must be set, indicating a 1-byte sub command follows
this byte, and before the remaining
Sub Command
0x01
BlockPermaLock
Access Password
[4 bytes]
The Access Password for the tag.
Note:
Do not include password if Select Option = 0xX0.
| Select
[Address, Data
Length, Data]
[n bytes]
The remaining fields from the
Note:
Optional depending on the value of Select Option.
RFU
0x00
Reserved for future use.
Read/Lock
[1 byte]
Only the Least Significant Bit is used:
• 0x00 = Return the PermaLock status of the blocks specified.
• 0x01 = PermaLock the blocks specified
MemoryBank
0x03
Memory bank who’s blocks will be locked. Currently only User Memory is sup-
ported.
BlockPointer
[4 bytes]
The starting address for Mask, in units of 16 blocks. For example, BlockPtr =
0x00 indicates block 0, BlockPtr = 0x01 indicates block 16, BlockPtr = 0x02 indi-
cates block 32. Depending on the tag memory configuration all 32 Words of
User memory may not be available.
Note:
For Higgs3 tags this value must always be 0x00
BlockRange
[1 byte]
The range of Mask, starting at BlockPointer and ending (16×BlockRange)–1
blocks later.
Note:
For Higgs3 tags this value must always be 0x01
Mask
[2*Block-
Range
bytes]
Memory blocks to PermaLock. Mask depends on the Read/Lock bit as follows:
• Read/Lock = 0: Do not include the Mask field.
• Read/Lock = 1: Mask is 16×BlockRange bits. The Mask bits shall be ordered
from lower-order block to higher (i.e. if BlockPtr = 00h then the most-
significant Mask bit refers to block 0).
– Mask bit = 0: No change to block.
– Mask bit = 1: Permalock the corresponding memory block.