ST25DV04K datasheet(127/200 Pages) STMICROELECTRONICS

127 / 200 page

Response parameters:

•

Block security status if Option_flag is set (see Table 215. Block security status)

•

Four bytes of block data

Table 215. Block security status

Reserved for future use

All at 0

0: Current Block not locked

1: Current Block locked

Table 216. Fast Read Single Block 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 not supported

–

0Fh: error with no information given

–

10h: the specified block is not available

–

15h: the specified block is read-protected

Figure 66. Fast Read Single Block frame exchange between VCD and ST25DVxxx

SOF

Fast Read

Single Block

request

VCD

ST25DVxxx

EOF

SOF

Fast Read

Single Block

response

EOF

7.6.38

Fast Extended Read Single Block

On receiving the Fast Extended Read Single Block command, the ST25DVxxx reads the requested block and

sends back its 32-bit value in the response. When the Option_flag is set, the response includes the Block Security

Status. The data rate of the response is multiplied by 2.

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

The Inventory_flag must be set to 0.

Block number is coded on 2 Bytes so all memory blocks of ST25DV16K-xx and ST25DV64K-xx can be addressed

using this command

ST25DV04K ST25DV16K ST25DV64K

RF commands

DS10925 - Rev 9

page 127/200

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