sri4k STMicroelectronics, sri4k Datasheet - Page 36

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

SRI4K commands
8.9
36/49
Figure 46. WRITE_BLOCK frame exchange between Reader and SRI4K
GET_UID() command
Command Code = 0Bh
On receiving the GET_UID command, the SRI4K returns its 8 UID Bytes. UID Bytes are
transmitted with the Least Significant Byte first, and each byte is transmitted with the least
significant bit first.
The SRI4K must have received a SELECT() command and be switched to SELECTED state
before any GET_UID() command can be accepted. All GET_UID() commands sent to the
SRI4K before a SELECT() command is issued, are ignored.
Figure 47. GET_UID request format
Request parameter:
Figure 48. GET_UID response format
Response parameters:
Reader
SRI4K
SOF
–
–
–
–
UID 0
8 bits
SOF
No parameter
UID 0: Less significant UID Byte
UID 1 to UID 6: UID Bytes
UID 7: Most significant UID Byte.
09h
UID 1
8 bIts
ADDR
SOF
UID 2
8 bIts
DATA
GET_UID
1
0Bh
UID 3
8 bIts
DATA
2
UID 4
DATA
8 bIts
3
8 bits
CRC L
DATA
UID 5
4
8 bIts
CRC L CRC H EOF
UID 6
8 bIts
CRC H
8 bits
UID 7
8 bIts
EOF
CRC L
8 bits
No Response
CRC H
8 bIts
AI07693
AI07694
SRI4K
AI10891
EOF