srt512 STMicroelectronics, srt512 Datasheet - Page 28

• Manufacturer Part Number: srt512
• Description: 13.56 Mhz Short-range Contactless Memory Chip With 512-bit Eeprom And Anticollision Functions
• Manufacturer: STMicroelectronics

SRT512 commands
8.1
28/49
INITIATE() command
Command Code = 06h - 00h
INITIATE() is used to initiate the anticollision sequence of the SRT512. On receiving the
INITIATE() command, all SRT512 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 SRT512 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 21. INITIATE request format
Request parameter:
Figure 22. INITIATE response format
Response parameter:
Figure 23. INITIATE frame exchange between Reader and SRT512
SRT512
Reader
No parameter
Chip_ID of the SRT512
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
CRC L CRC H EOF
EOF
EOF
AI07671
SRT512
AI07670
AI13507b