SRT512-SBN18/1G2 STMICROELECTRONICS [STMicroelectronics], SRT512-SBN18/1G2 Datasheet - Page 29

• Manufacturer Part Number: SRT512-SBN18/1G2
• Description: 13.56 MHz short-range contactless memory chip with 512-bit EEPROM and anticollision functions
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SRT512
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 (1111
Initiate() command is issued, or until the SRT512 is powered off. The new
Chip_slot_number value is then compared with the value 0000
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:
●
Figure 26. Pcall16 response format
Response parameter:
●
Figure 27. Pcall16 frame exchange between reader and SRT512
Reader
SRT512
No parameter
Chip_ID of the SRT512
SOF
SOF
SOF
06h
06h
04h
Pcall16
CRC L
Chip_ID
8 bits
Doc ID 13277 Rev 4
CRC H EOF
04h
b
). The value is retained until a new Pcall16() or
8 bits
CRC L
<-t 0 -> <-t 1 ->
8 bits
CRC L
SOF
CRC H
8 bits
b
. If they match, the SRT512
Chip_ID
CRC H
8 bits
SRT512 commands
CRC L CRC H
EOF
EOF
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