sri4k STMicroelectronics, sri4k Datasheet - Page 29

• Manufacturer Part Number: sri4k
• Description: 13.56 Mhz Short-range Contactless Memory Chip With 4096-bit Eeprom And Anticollision Functions
• Manufacturer: STMicroelectronics

SRI4K
8.2
PCALL16() command
Command Code = 06h - 04h
The SRI4K must be in INVENTORY state to interpret the PCALL16() command.
On receiving the PCALL16() command, the SRI4K 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
until a new PCALL16() or INITIATE() command is issued, or until the SRI4K is powered off.
The new CHIP_SLOT_NUMBER value is then compared with the value 0000
match, the SRI4K returns its Chip_ID value. If not, the SRI4K 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 SRI4K device in
INVENTORY state present in the reader field range.
Figure 26. PCALL16 request format
Request parameter:
Figure 27. PCALL16 response format
Response parameter:
Figure 28. PCALL16 frame exchange between reader and SRI4K
Reader
SRI4K
–
–
SOF
SOF
No parameter
Chip_ID of the SRI4K
SOF
06h
06h
04h
PCALL16
Chip_ID
8 bits
CRC L
04h
CRC H EOF
8 bits
CRC L
<-t 0 -> <-t 1 ->
8 bits
CRC L
SOF
CRC H
8 bits
Chip_ID
CRC H
8 bits
b
). The value is retained
CRC L CRC H
SRI4K commands
EOF
AI07671
b
. If they
EOF
AI07673
AI10885b
EOF
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