ST25TV02K datasheet(68/90 Pages) STMICROELECTRONICS

68 / 90 page

•

AFI if the AFI flag is set

•

Mask length

•

Mask value

•

First block number

•

Number of blocks

Table 143. Fast Inventory read response format when Error_flag is NOT set

Response SOF

Request_flags

DSFID

UID

Block security status (1)

Data

CRC16 request

EOF

8 bits

64 bits

8 bits (2)

32 bits(2)

16 bits

1. The field is optional.

2. The group of Block security status (if any), and its data are repeated if needed, for up to the number of blocks requested.

Response parameter:

•

DSFID,

•

Unique ID

•

N blocks of block security status if Option_flag is set (see Table Table 46. Block security status)

•

N blocks of data

Table 144. Block security status

Reserved for future use.

All at 0.

0: Current block not locked

1: Current block locked

During a Fast Inventory Read process, if the VCD does not receive an RF ST25TV02K/512 response, it waits t3

time before sending an EOF to switch to the next slot. t3 starts from the rising edge of the request EOF sent by

the VCD.

•

If the VCD sends a 100% modulated EOF, the minimum value of t3 is:

t3min = 4384/fC (323.3 μs) + tSOF

•

If the VCD sends a 10% modulated EOF, the minimum value of t3 is:

t3min = 4384/fC (323.3 μs) + tNRT

where:

•

tSOF is the time required by the ST25TV02K/512 to transmit an SOF to the VCD

•

tNRT is the nominal response time of the ST25TV02K/512

tNRT and tSOF are dependent on the ST25TV02K/512-to-VCD data rate and sub-carrier modulation mode.

6.4.39

Enable Untraceable mode

With the Enable untraceable mode command the ST25TV02K/512 will not respond to any command except

Present Password and Get Random Number.

The Enable_Untraceable command requires the untraceable access code (fixed value) and the crypted

untraceable mode password to be presented for the command to be executed properly

Table 145. Enable untraceable mode request format

Response SOF Request_flags

Enable untraceable

mode

IC Mfg code UID (1)

Password

number

Crypted

password

CRC16 request EOF

8 bits

BAh

02h

64 bits 00h

32 bits

16 bits

1. The field is optional.

ST25TV02K ST25TV512

RF commands

DS12074 - Rev 11

page 68/90

ST25TV02K Datasheet(PDF) 68 Page - STMicroelectronics

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