sri512 STMicroelectronics, sri512 Datasheet - Page 36

• Manufacturer Part Number: sri512
• Description: 13.56-mhz Short-range Contactless Memory Chip With 512-bit Eeprom And Anti-collision Functions
• Manufacturer: STMicroelectronics

SRI512 commands
8.8
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WRITE_BLOCK (Addr, Data) command
Command Code = 09h
On receiving the WRITE_BLOCK command, the SRI512 writes the 4 bytes contained in the
command to the addressed block, provided that the block is available and not Write-
protected. Data Bytes are transmitted with the Least Significant Byte first, and each byte is
transmitted with the least significant bit first.
The address Byte gives access to the 16 blocks of the SRI512 (addresses 0 to 15).
WRITE_BLOCK commands issued with a block address above 15 will not be interpreted
and the SRI512 will not return any response, except for the System area located at address
255.
The result of the WRITE_BLOCK command is submitted to the addressed block. See the
following paragraphs for a complete description of the WRITE_BLOCK command:
The WRITE_BLOCK command does not give rise to a response from the SRI512. The
reader must check after the programming time, t
The SRI512 must have received a SELECT() command and be switched to SELECTED
state before any WRITE_BLOCK command can be accepted. All WRITE_BLOCK
commands sent to the SRI512 before a SELECT() command is issued, are ignored.
Figure 44. WRITE_BLOCK request format
Request parameters:
Figure 45. WRITE_BLOCK response format
SOF
Figure 12: Resettable OTP area (addresses 0 to
Figure 15: Binary counter (addresses 5 to
Figure 17: EEPROM (addresses 7 to
ADDRESS: block addresses from 0 to 15, or 255
DATA 1: Less significant data Byte
DATA 2: Data Byte
DATA 3: Data Byte
DATA 4: Most significant data Byte.
WRITE_BLOCK
09h
ADDRESS
8 bIts
DATA 1
8 bIts
No Response
DATA 2
15).
8 bIts
6).
W
, that the data was correctly programmed.
DATA 3
8 bIts
4).
DATA 4
8 bIts
CRC L
8 bits
CRC H
8 bIts
SRI512
AI07680
AI07687
EOF