ST25DV64K datasheet(95/200 Pages) STMICROELECTRONICS

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•

Error code as Error_flag is set:

–

03h: command option is not supported

–

0Fh: error with no information given

–

10h: the specified block is not available

–

15h: the specified block is read-protected

Figure 42. Extended Read Multiple Block frame exchange between VCD and ST25DVxxx

SOF

Extended

Read Multiple

Block request

VCD

ST25DVxxx

EOF

SOF

Extended

Read Multiple

Block response

EOF

7.6.14

Write Multiple Blocks

On receiving the Write Multiple Block command, the ST25DVxxx writes the data contained in the request to the

requested blocks, and reports whether the write operation were successful in the response. ST25DVxxx supports

up to 4 blocks, data field must be coherent with the number of blocks to program.

If some blocks overlaps areas, or overlap end of user memory, the ST25DVxxx returns an error code and none of

the blocks are programmed. When the Option_flag is set, wait for EOF to respond. During the RF write cycle Wt,

there should be no modulation (neither 100% nor 10%), otherwise the ST25DVxxx may not program correctly the

data into the memory. The Wt time is equal to t1nom + m × 302 μs < 20 ms. (m is an integer, it is function of Nb

number of blocks to be programmed).

The Inventory_flag must be set to 0.

Block number is coded on 1 Byte and only first 256 blocks of ST25DV16K-xx and ST25DV64K-xx can be

addressed using this command.

Table 133. Write Multiple Block request format

Request

SOF

Request_flags

Write

Multiple

Block

UID (1)

First Block

number

Number of

block (2)

Data

CRC16

Request

EOF

8 bits

24h

64 bits

8 bits

Block length

(3)

16 bits

1. This field is optional.

2. The number of blocks in the request is one less than the number of blocks that the VICC shall write.

3. Repeated as needed

Request parameters:

•

Request flags

•

UID (optional)

•

First Block number

•

Number of blocks

•

Data

ST25DV04K ST25DV16K ST25DV64K

RF commands

DS10925 - Rev 9

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