LRI64 datasheet(23/38 Pages) STMICROELECTRONICS

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LRI64

Write Single Block

When receiving the Write Single Block command,

the LRI64 writes the requested block with the data

contained in the Request and report the success

of the operation in the Response. The Option_Flag

is not supported and must be set to 0. The Write

Single Block can be issued in both addressed and

non addressed modes.

During the write cycle tW, no modulation shall oc-

cur, otherwise the LRI64 may program the data in-

correctly in the memory.

The Request Frame (Figure 31.) contains:

–

Request Flags (Table 3. and Table 4.)

–

Write Single Block Command Code (21h,

Table 9.)

–

Unique ID (Optional)

–

Block Number

–Data

–

2-byte CRC (Figure 16.)

If there is no error, at the LRI64, an empty Re-

sponse Frame (Figure 32.) is sent back after the

write cycle, containing no parameters. It just con-

tains:

–

Response Flags (Table 6.)

–

2-byte CRC (Figure 16.)

Otherwise, if there is an error, the Response

Frame (Figure 33.) contains:

–

Response Flags (01h, Table 6.)

–

Error Code (0Fh, Table 7.)

–

2-byte CRC (Figure 16.)

Figure 31. Write Single Block, Request Frame Format

Figure 32. Write Single Block, Response Frame Format, when Error_Flag is not Set

Figure 33. Write Single Block, Response Frame Format, when Error_Flag is Set

Figure 34. Write Single Block Frame Exchange between VCD and LRI64

AI09735

Request

SOF

Request

Flags

Command

Code

UID

2-Byte

CRC

Request

EOF

8 bits

21h

64 bits

16 bits

Block

Number

8 bits

Data

8 bits

AI09736

Response

SOF

Response

Flags

2-Byte

CRC

Response

EOF

8 bits

16 bits

AI09737

Response

SOF

Response

Flags

Error

Code

2-Byte

CRC

Response

EOF

8 bit

01h

8 bits

0Fh

16 bits

AI06833B

VCD

VICC

EOF

SOF

Write Single

Block Request

EOF

SOF

Write Single

Block Response

Write sequence when error

SOF

Write Single

Block Response

EOF

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