ST25DV64KC datasheet(132/203 Pages) STMICROELECTRONICS

132 / 203 page

7.6.39

Fast Read Multiple Blocks

On receiving the Fast Read Multiple Blocks command, the ST25DVxxKC reads 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. The maximum number of blocks is fixed to 256. Fast Read

Multiple Blocks command can cross areas borders, and returns all blocks until reaching a non readable block

(block read protected or out of memory).

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 ST25DVxxKC answers with an error code.

The Inventory_flag must be set to 0.

Block number is coded on 1 Byte and only first 256 blocks of ST25DV16KC and ST25DV64KC can be addressed

using this command.

Table 224. 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. This field is optional.

Request parameters:

•

Request flag

•

UID (Optional)

•

First block number

•

Number of blocks

Table 225. 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. This field is optional.

2. Repeated as needed.

Response parameters:

•

Block security status if Option_flag is set (see Table 226)

•

N block of data

Table 226. Block security status if Option_flag is set

Reserved for future use

All at 0

0: Current not locked

1: Current locked

Table 227. Fast Read Multiple Block response format when Error_flag is set

Response SOF

Response_flags

Error code

CRC16

Response EOF

8 bits

16 bits

ST25DV04KC ST25DV16KC ST25DV64KC

RF commands

DS13519 - Rev 3

page 132/203

ST25DV64KC Scheda tecnica(PDF) 132 Page - STMicroelectronics

ST25DV64KC Scheda tecnica(HTML) 132 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL