ST25DV64K datasheet(166/220 Pages) STMICROELECTRONICS

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RF operations

ST25DV04K ST25DV16K ST25DV64K

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DocID027603 Rev 4

Response parameters:

•

One byte of data: volatile Control register.

Response parameter:

•

Error code as Error_flag is set:

–

02h: command option not recognized

–

03h: command not supported

–

0Fh: error with no information given

7.6.43

Fast Read Dynamic Configuration

On receiving the Fast Read Dynamic Configuration command, the ST25DVxxx reads the

Dynamic register address by the pointer and sends back its 8-bit value in the response.

The Option_flag is not supported. The Inventory_flag must be set to 0.

The subcarrier_flag should be set to 0, otherwise the ST25DVxxx answers with an error

code.

The data rate of the response is multiplied by 2 compared to Read Dynamic Configuration

command.

Table 194. Fast Read Message Length response format when Error_flag is NOT set

Response SOF

Response_flags

Data

CRC16

Response EOF

8 bits

16 bits

Table 195. Fast Read Message Length response format when Error_flag is set

Response SOF

Response_flags

Error code

CRC16

Response EOF

8 bits

16 bits

Figure 71. Fast Read Message Length frame exchange between VCD and ST25DVxxx

VCD

SOF

Fast Read

Message Length

request

EOF

ST25DVxxx

<-t1-> SOF

Fast Read

Message Length

request

EOF

Table 196. Fast Read Dynamic Configuration request format

Request

SOF

Request_flags

Fast Read Dynamic

Configuration

IC Mfg

code

UID(1)

Pointer

address

CRC16

Request

EOF

8 bits

CDh

02h

64 bits

8 bits

16 bits

1. Gray color means that the field is optional.

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