SRIX4K-SBN181GE STMICROELECTRONICS [STMicroelectronics], SRIX4K-SBN181GE Datasheet - Page 35

• Manufacturer Part Number: SRIX4K-SBN181GE
• Description: 13.56 MHz short-range contactless memory chip with 4096-bit EEPROM, anticollision and anti-clone functions
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SRIX4K
9.7
Read_block(Addr) command
Command code = 08h
On receiving the Read_block command, the SRIX4K reads the desired block and returns
the 4 data bytes contained in the block. 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 SRIX4K (addresses 0 to 127).
Read_block commands issued with a block address above 127 will not be interpreted and
the SRIX4K will not return any response, except for the System area located at address
255.
The SRIX4K must have received a Select() command and be switched to Selected state
before any Read_block() command can be accepted. All Read_block() commands sent to
the SRIX4K before a Select() command is issued are ignored.
Figure 42. Read_block request format
Request parameter:
●
Figure 43. Read_block response format
Response parameters:
●
●
●
●
Figure 44. Read_block frame exchange between reader and SRIX4K
SRIX4K
Reader
SOF
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
SOF
S
O
F
Data 1
08h
8 bIts
Read_block
ADDR
08h
Data 2
CRC L CRC H
8 bIts
Address
8 bIts
E
O
F
8 bIts
Data 3
<-t 0 -><-t 1 ->
S
O
F
8 bIts
8 bits
Data 4
CRC L
Data 1
Data 2 Data 3 Data 4
CRC L
8 bits
CRC H
8 bits
SRIX4K commands
CRC H
8 bIts
CRC L CRC H
EOF
EOF
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