sri4k STMicroelectronics, sri4k Datasheet - Page 35

• Manufacturer Part Number: sri4k
• Description: 13.56 Mhz Short-range Contactless Memory Chip With 4096-bit Eeprom And Anticollision Functions
• Manufacturer: STMicroelectronics

SRI4K
8.8
Figure 44. WRITE_BLOCK request format
Figure 45. WRITE_BLOCK response format
SOF
WRITE_BLOCK
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
The 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.
Request parameters:
09h
–
–
–
–
–
–
–
–
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 127, or 255
DATA 1: Less significant data Byte
DATA 2: Data Byte
DATA 3: Data Byte
DATA 4: Most significant data Byte.
ADDRESS
8 bIts
DATA 1
8 bIts
No Response
DATA 2
8 bIts
DATA 3
8 bIts
127).
W
, that the data was correctly programmed.
6).
DATA 4
8 bIts
4).
CRC L
8 bits
SRI4K commands
CRC H
8 bIts
AI07680
AI07687
EOF
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