ST25DV64KC datasheet(118/203 Pages) STMICROELECTRONICS

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7.6.27

Write Configuration

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

must be preceded by a valid presentation of the RF configuration password (00) to open the RF configuration

security session.

On receiving the Write Configuration command, the ST25DVxxKC writes 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

ST25DVxxKC 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 187. Write Configuration request format

Request

SOF

Request_flags

Write

Configuration

IC Mfg

code

UID (1) Pointer

value(2)

CRC16

Request

EOF

8 bits

A1h

02h

64 bits 8 bits

8 bits

16 bits

1. This 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 188. 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 13. System configuration memory map for details on register addresses.

Response parameter:

•

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

Table 189. 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: block not available

–

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

–

13h: the specified block was not successfully programmed

ST25DV04KC ST25DV16KC ST25DV64KC

RF commands

DS13519 - Rev 3

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