ST25DV64K datasheet(124/220 Pages) STMICROELECTRONICS

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RF operations

ST25DV04K ST25DV16K ST25DV64K

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DocID027603 Rev 4

Response parameter:

•

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

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.

Figure 42. Extended Read Multiple Block frame exchange between

VCD and ST25DVxxx

VCD

SOF

Extended

Read Multiple

Block request

EOF

ST25DVxxx

<-t1-> SOF

Extended Read

Multiple Block

response

EOF

Table 96. Write Multiple Block request format

Request

SOF

Request_flags

Write

Multiple

Block

UID(1)

First

Block

number

Number

block(2)

Data

CRC16

Request

EOF

8 bits

24h

64 bits

8 bits

Block

length(3)

16 bits

1. Gray color means that the 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

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