LRI64 datasheet(37/52 Pages) STMICROELECTRONICS

37 / 52 page

LRI64

Command codes

37/52

18.5

Get System Info

When receiving the Get System Info command, the LRI64 send back its information data in

the Response.The Option_Flag is not supported and must be set to 0. The Get System Info

can be issued in both addressed and non addressed modes.

The Request Frame (Figure 26) contains:

●

Request Flags (Table 3 and Table 4)

●

Get System Info Command Code (2Bh, Table 9)

●

Unique ID (Optional)

●

2-byte CRC (Figure 15)

If there is no error, at the LRI64, the Response Frame (Figure 27) contains:

●

Response Flags (Table 6)

●

Information Flags set to 0Fh, indicating the four information fields that are present

(DSFID, AFI, Memory Size, IC Reference)

●

Unique ID

●

DSFID value (as written in block 9)

●

AFI value (as written in block 8)

●

Memory size: for the LRI64, there are 15 blocks (0Eh) of 1 byte (00h).

●

IC Reference: only the 6 most significant bits are used. The product code of the LRI64

is 00 0101b=5d

●

2-byte CRC (Figure 15)

Otherwise, if there is an error, the Response Frame (Figure 28) contains:

●

Response Flags (01h, Table 6)

●

Error Code (0Fh, Table 7)

●

2-byte CRC (Figure 15)

Figure 34.

Get System Info, request frame format

Figure 35.

Get System Info, response frame format, when Error_Flag is not set

Figure 36.

Get System Info, response frame format, when Error_Flag is set

AI09738

Request

SOF

Request

Flags

Command

Code

UID

2-Byte

CRC

Request

EOF

8 bits

2Bh

64 bits

16 bits

AI09739

Response

SOF

Response

Flags

Information

Flags

UID

2-Byte

CRC

Response

EOF

8 bits

00h

8 bits

0Fh

64 bits

16 bits

DSFID

8 bits

AFI

8 bits

Memory

Size

16 bits

000Eh

Ref

8 bits

000101xxb

AI09740

Response

SOF

Response

Flags

Error

Code

2-Byte

CRC

Response

EOF

8 bits

01h

8 bits

0Fh

16 bits

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