sri512 STMicroelectronics, sri512 Datasheet - Page 29

• Manufacturer Part Number: sri512
• Description: 13.56-mhz Short-range Contactless Memory Chip With 512-bit Eeprom And Anti-collision Functions
• Manufacturer: STMicroelectronics

SRI512
8.1
INITIATE() command
Command Code = 06h - 00h
INITIATE() is used to initiate the anticollision sequence of the SRI512. On receiving the
INITIATE() command, all SRI512 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 SRI512 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 SRI512
Reader
SRI512
No parameter
Chip_ID of the SRI512
SOF
SOF
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
SOF Chip_ID
CRC H
8 bits
CRC H
8 bits
SRI512 commands
CRC L CRC H EOF
EOF
EOF
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