SRI4K_11 Datasheet, PDF (28/46 Pages) STMicroelectronics – 13.56 MHz short-range contactless memory chip with 4096-bit EEPROM and anticollision functions

SRI4K commands
SRI4K
8.1
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
SOF
Initiate
06h
00h
CRCL
8 bits
CRCH
8 bits
EOF
Request parameter:
● No parameter
Figure 24. Initiate response format
AI07670b
SOF
Chip_ID
8 bits
CRCL
8 bits
CRCH
8 bits
Response parameter:
● Chip_ID of the SRI4K
Figure 25. Initiate frame exchange between reader and SRI4K
EOF
AI07671
Reader _{SOF 06h}
SRI4K
00h CRCL CRCH EOF
<-t0-><-t1-> SOF Chip_ID CRCL CRCH EOF
AI10884b
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