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SRT512 датащи(PDF) 29 Page - STMicroelectronics

номер детали SRT512
подробное описание детали  13.56 MHz short-range contactless memory chip with 512-bit EEPROM and anticollision functions
PDF  46 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SRT512 датащи(HTML) 29 Page - STMicroelectronics

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SRT512
SRT512 commands
29/46
8.2
Pcall16() command
Command code = 06h - 04h
The SRT512 must be in Inventory state to interpret the Pcall16() command.
On receiving the Pcall16() command, the SRT512 first generates a new random
Chip_slot_number value (in the 4 least significant bits of the Chip_ID). Chip_slot_number
can take on a value between 0 an 15 (1111b). The value is retained until a new Pcall16() or
Initiate() command is issued, or until the SRT512 is powered off. The new
Chip_slot_number value is then compared with the value 0000b. If they match, the SRT512
returns its Chip_ID value. If not, the SRT512 does not send any response.
The Pcall16() command, used together with the Slot_marker() command, allows the reader
to search for all the Chip_IDs when there are more than one SRT512 device in Inventory
state present in the reader field range.
Figure 25.
Pcall16 request format
Request parameter:
●
No parameter
Figure 26.
Pcall16 response format
Response parameter:
●
Chip_ID of the SRT512
Figure 27.
Pcall16 frame exchange between reader and SRT512
8.3
Slot_marker(SN) command
Command code = x6h
SOF
Pcall16
CRCL
CRCH
EOF
AI07673b
06h
04h
8 bits
8 bits
SOF
Chip_ID
CRCL
CRCH
EOF
AI07671
8 bits
8 bits
8 bits
SOF
06h
CRCL
CRCH EOF
AI13508b
Reader
SRT512
SOF
Chip_ID
CRCL CRCH
EOF
<-t0-> <-t1->
04h



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