ST25DV64K datasheet(150/220 Pages) STMICROELECTRONICS

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RF operations

ST25DV04K ST25DV16K ST25DV64K

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Response parameter:

•

Error code as Error_flag is set:

–

02h: command not recognized

–

13h: the specified block was not successfully programmed (this error is generated

if the ManageCPO GPOVAL value is not in line with the GPO interrupts setting as

specified in Table 157)

7.6.31

Write Message

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

request into the Mailbox buffer, update the MB_LEN_Dyn register, and set bit

RF_PUT_MSG in MB_CTRL_Dyn register. 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). Write Message could

be executed only when Mailbox is accessible by RF (fast transfer mode is enabled, 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”. The

Option_flag is not supported. (refer to Section 5.1: Fast transfer mode (FTM))

Request parameters:

•

Request flags

•

UID (optional)

•

Message Length

•

Message Data

Figure 59. ManageGPO frame exchange between VCD and ST25DVxxx

VCD

SOF ManageGPO EOF

ST25DVxxx

<-t1-> SOF

ManageGPO

response

EOF

ManageGPO sequence

when error

Table 160. Write Message request format

Request

SOF

Request_

flags

Write

Message

IC Mfg code UID(1) MSGLength

Message

Data

CRC16

Request

EOF

8 bits

AAh

02h

64 bits

1 byte

(MSGLength + 1)

bytes

16 bits

1. Gray color means that the field is optional.

Table 161. Write Message response format when Error_flag is NOT set

Response SOF

Response_flags

CRC16

Response EOF

8 bits

16 bits

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