SRI4K-SBN181GE STMICROELECTRONICS [STMicroelectronics], SRI4K-SBN181GE Datasheet - Page 34

• Manufacturer Part Number: SRI4K-SBN181GE
• Description: 13.56 MHz short-range contactless memory chip with 4096-bit EEPROM and anticollision functions
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SRI4K commands
8.8
34/45
Write_block (Addr, Data) command
Command code = 09h
On receiving the Write_block command, the SRI4K 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 128 blocks of the SRI4K (addresses 0 to 127).
Write_block commands issued with a block address above 127 will not be interpreted and
the SRI4K 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 Figures for a complete description of the Write_block command:
●
●
●
The Write_block command does not give rise to a response from the SRI4K. The reader
must check after the programming time, t
SRI4K 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 SRI4K
before a Select() command is issued, are ignored.
Figure 44. Write_block request format
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●
●
●
●
●
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
Request parameters:
Address: block addresses from 0 to 127, 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
W
No response
Data 2
127).
, that the data was correctly programmed. The
8 bIts
6).
Data 3
8 bIts
4).
Data 4
8 bIts
CRC L
8 bits
CRC H
8 bIts
AI07680b
SRI4K
AI07687b
EOF