sri4k STMicroelectronics, sri4k Datasheet - Page 28

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

SRI4K commands
8.1
28/49
INITIATE() command
Command Code = 06h - 00h
INITIATE() is used to initiate the anticollision sequence of the SRI4K. On receiving the
INITIATE() command, all SRI4K devices in READY state switch to INVENTORY state, set a
new 8-bit Chip_ID random value, and return their Chip_ID value. This command is useful
when only one SRI4K in READY state is present in the reader field range. It speeds up the
Chip_ID search process. The CHIP_SLOT_NUMBER is not used during INITIATE()
command access.
Figure 23. INITIATE request format
Request parameter:
Figure 24. INITIATE response format
Response parameter:
Figure 25. INITIATE frame exchange between reader and SRI4K
Reader
SRI4K
–
–
SOF
SOF
No parameter
Chip_ID of the SRI4K
SOF
06h
06h
00h
INITIATE
Chip_ID
8 bits
CRC L
00h
CRC H EOF
8 bits
CRC L
<-t 0 -><-t 1 ->
8 bits
CRC L
CRC H
8 bits
SOF Chip_ID
CRC H
8 bits
EOF
CRC L CRC H EOF
AI07671
EOF
AI07670
AI10884b
SRI4K