ST25TV02K datasheet(55/90 Pages) STMICROELECTRONICS

55 / 90 page

Figure 27. Fast Read Single Block frame exchange between VCD and ST25TV02K/512

SOF

Fast Read

Single Block

request

VCD

ST25TV02K/512

EOF

SOF

Fast Read

Single Block

response

EOF

6.4.23

Fast Read Multiple Blocks

On receiving the Fast Read Multiple Blocks command, the ST25TV02K/512 read the selected blocks and sends

back their value in multiples of 32 bits in the response. The blocks are numbered from 00h up to the last block of

user memory in the request, and the value is minus one (-1) in the field. For example, if the “Number of blocks”

field contains the value 06h, seven blocks are read. If the number of blocks overlaps area, the ST25TV02K/512

return only the blocks that are readable assuming reading starts from an Area that is readable, and stops when

reaching an Area that is not readable.

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 ST25TV02K/512 answer with an error code.

Block number is coded on 1 Byte.

Table 100. Fast Read Multiple Block request format

Request

SOF

Request_flags

Fast Read

Multiple Block

IC Mfg

code

UID (1)

First block

number

Number of

blocks

CRC16

Request

EOF

8 bits

C3h

02h

64 bits 8 bits

8 bits

16 bits

1. The field is optional.

Request parameters:

•

Request flag

•

UID (Optional)

•

First block number

•

Number of blocks

Table 101. Fast Read Multiple Block response format when Error_flag is NOT set

Response SOF

Response_flags

Block security status (1)

Data

CRC16

Response EOF

8 bits

8 bits (2)

32 bits(2)

16 bits

1. The field is optional.

2. Repeated as needed.

Response parameters:

•

Block security status if Option_flag is set (see Table 102. Block security status if Option_flag is set)

•

N block of data

Table 102. Block security status if Option_flag is set

ST25TV02K ST25TV512

RF commands

DS12074 - Rev 11

page 55/90

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