srt512 STMicroelectronics, srt512 Datasheet - Page 33

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

SRT512
8.6
RESET_TO_INVENTORY() command
Command Code = 0Ch
On receiving the RESET_TO_INVENTORY() command, all SRT512 devices in SELECTED
state revert to INVENTORY state. The concerned SRT512 devices are thus resubmitted to
the anticollision sequence. This command is useful when two SRT512 devices with the
same 8-bit Chip_ID happen to be in SELECTED state at the same time. Forcing them to go
through the anticollision sequence again allows the reader to generates new PCALL16()
commands and so, to set new random Chip_IDs.
The RESET_TO_INVENTORY() command does not generate a response.
All SRT512 devices that are not in SELECTED state ignore the RESET_TO_INVENTORY()
command.
Figure 36. RESET_TO_INVENTORY request format
Request parameter:
Figure 37. RESET_TO_INVENTORY response format
Figure 38. RESET_TO_INVENTORY frame exchange between Reader and SRT512
No parameter
Reader
SRT512
SOF
SOF
RESET_TO_INVENTORY
0Ch
CRC L
0Ch
CRC H EOF
No Response
8 bits
CRC L
CRC H
8 bits
No Response
SRT512 commands
EOF
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