ST25TV02K datasheet(50/90 Pages) STMICROELECTRONICS

50 / 90 page

6.4.19

Write Configuration

The Write Configuration command is used to write system configuration register. The Write Configuration must

be preceded by a valid presentation of the configuration password (PWG_CFG) to open the RF configuration

security session.

On receiving the Write Configuration command, the ST25TV02K/512 write the data contained in the request to

the system configuration register at the Pointer address and reports whether the write operation was successful in

the response or not.

When the Option_flag is set, wait for EOF to respond. The Inventory_flag is not supported.

During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the

ST25TV02K/512 may not program correctly the data into the Configuration byte. The Wt time is equal to t1nom +

N × 302 µs (N is an integer).

Table 87. Write Configuration request format

Request SOF

Request_

flags

Write Configuration

IC Mfg code

UID (1)

Pointer

CRC16

Request EOF

8 bits

A1h

02h

64 bits

8 bits

16 bits

1. The field is optional.

2. Before updating the register value, check the meaning of each bit in previous sections.

Request parameters:

•

Request flags

•

UID (optional)

Table 88. Write Configuration response format when Error_flag is NOT set

Response SOF

Response_flags

CRC16

Response EOF

8 bits

16 bits

Note:

Please refer to Table 4. System configuration memory map accessible through write_cfg and read_cfg

commands for details on register addresses.

Response parameter:

•

No parameter. The response is sent back after the writing cycle.

Table 89. Write Configuration response format when Error_flag is set

Response SOF

Response_flags

Error code

CRC16

Response EOF

8 bits

16 bits

Response parameter:

•

Error code as Error_flag is set:

–

02h: command not recognized

–

03h: command option is not supported

–

0Fh: error with no information given

–

10h: not available

–

12h: block already locked, content can't change

–

13h: the specified block was not successfully programmed

ST25TV02K ST25TV512

RF commands

DS12074 - Rev 11

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