ST25TV02K datasheet(37/90 Pages) STMICROELECTRONICS

37 / 90 page

Table 50. Write Single Block response format when Error_flag is set

Response SOF

Response_flags

Error code

CRC16

Response EOF

8 bits

16 bits

Response parameter:

•

Error code as Error_flag is set

–

03h: command option not supported(1)

–

10h: the specified block is not available

–

12h: the specified block is locked or protected and its contents cannot be changed

–

13h: the specified block was not successfully programmed

1. For more details, see Figure 5. Memory organization

Figure 12. Write Single Block frame exchange between VCD and ST25TV02K/512

SOF

Write Single

Block request

VCD

EOF

ST25TV02K/512

SOF

Write Single

Block response

EOF

SOF

Write Single

Block response

EOF

ST25TV02K/512

Write sequence

when error

When the Option_flag is set, wait for EOF to respond.

Block number is coded on 1 Byte.

6.4.8

Lock block

On receiving the Lock block request, the ST25TV02K/512 lock the single block value permanently and protects its

content against new writing.

This command is applicable for all blocks of the user memory.

For a global protection of a area, update accordingly the AiSS bits in the system area. The Option_flag is

supported, when set wait for EOF to respond.

During the RF write cycle Wt, there should be no modulation (neither 100% nor 10%), otherwise the

ST25TV02K/512 may not lock correctly the single block value in memory. The Wt time is equal to t1nom + N

× 302 µs (N is an integer).

Table 51. Locking scheme

Area access description

Area x access rights

RW_PROTECTION_Ax [1:0]

Lock feature behavior

Area readable and writable

00b

Lock possible

Area protected in write by password

01b

Lock only possible if security session is open

Error = 14h if Security Session is closed

Area protected in read and write by password

10b

Lock only possible if security session is open

ST25TV02K ST25TV512

RF commands

DS12074 - Rev 11

page 37/90

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