SL2S3003 datasheet(65/82 Pages) NXP

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NXP Semiconductors

SL2S3003/SL2S3003TT

ICODE 3 (TagTamper)

8.5.3.23 READ TT

Command code = C4h

The READ TT command is only supported by the ICODE 3 TagTamper (SL2S3003TT).

The READ TT command provides the information about the TagTamper status. The status is detected when the

label IC is powered by an RF field. The response on The READ TT includes:

• One byte about the actual status of the TagTamper wire detected at start-up, and

• One byte with the stored TagTamper Status depending whether the OTP_TT_EN bit has been set or not, and

if a previous TagTamper event has been detected.

Option 0 (Option flag not set) is supported.

SOF

Flags

READ TT

IC Mfg code

UID

CRC16

EOF

8 bits

64 bits optional 16 bits

Table 124. READ TT request format

SOF

Flags

Error code

CRC16

EOF

8 bits

16 bits

Table 125. READ TT response format when Error_flag set

SOF

Flags

Actual TT Status

Stored TT Status

CRC16

EOF

8 bits

8 bit

16 bits

Table 126. READ TT response format when Error_flag NOT set

For the the details on the Actual and Stored TT Status byte refer to Table 127.

Byte

ASCII

Actual TT Status

Stored TT STAUS

0x4F

'O'

Open

0x43

'C'

Closed

0x49

'I'

Invalid

0x45

'E'

Storing of the internal Stored TagTamper

Status failed during startup (at the first

detected open TagTamper event at startup)

0x30

'0'

Show Actual TagTamper Status is not

enabled by the TT_SHOW_STATUS bits

Store TagTamper Status is not enabled

with the OTP_TT_EN or show Stored Tag

Tamper Status is not enabled by the TT_

SHOW_STATUS bits

Table 127. Actual and Stored TagTamper Status response status bytes

SL2S3003/SL2S3003TT

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Product data sheet

Rev. 3.0 — 28 March 2024

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