ST25DV64K datasheet(132/200 Pages) STMICROELECTRONICS

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Response parameter:

•

Error code as Error_flag is set:

–

02h: command not recognized

–

03h: the option is not supported

–

0Fh: error with no information given

–

10h: block address not available

–

15h: block read-protected

Figure 69. Fast Extended Read Multiple Block frame exchange between VCD and ST25DVxxx

SOF

Fast Extended

Read Multiple

Block request

VCD

ST25DVxxx

EOF

SOF

Fast Extended

Read Multiple

Block response

EOF

7.6.41

Fast Write Message

On receiving the Fast Write Message command, the ST25DVxxx puts the data contained in the request into the

mailbox buffer, updates the Message Length register MB_LEN_Dyn, and set Mailbox loaded bit RF_PUT_MSG.

It then reports if the write operation was successful in the response. The ST25DVxxx mailbox contains up to 256

data bytes which are filled from the first location '00'. MSGlength parameter of the command is the number of

Data bytes minus - 1 (00 for 1 byte of data, FFh for 256 bytes of data). Fast Write Message can be executed

only when Mailbox is accessible by RF (previous RF message was read or time-out occurs, no I2C message to be

read). User can check it by reading b1 of MB_CTRL_Dyn “HOST_PUT_MSG”, which must be reset to “0”. (refer

to Section 5.1 Fast transfer mode (FTM)).

•

The data rate of the response is multiplied by 2 compared to Write Message command.

•

The Option_flag is not supported.

•

The Inventory_flag must be set to 0.

•

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

Table 229. Fast Write Message request format

Request

SOF

Request_flags

Fast Write

Message

IC Mfg

code

UID (1) MSGLength

Message Data

CRC16

Request

EOF

8 bits

CAh

02h

64 bits 1 byte

(MsgLenght + 1)

bytes

16 bits

1. This field is optional.

Request parameters:

•

Request flag

•

UID (optional)

•

Message Lenght

•

Message Data

Table 230. Fast Write Message response format when Error_flag is NOT set

Response SOF

Response_flags

CRC16

Response EOF

8 bits

16 bits

ST25DV04K ST25DV16K ST25DV64K

RF commands

DS10925 - Rev 9

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