SRI4K datasheet(28/45 Pages) STMICROELECTRONICS

28 / 45 page

SRI4K commands

SRI4K

28/45

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 (1111b). The value is retained 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 0000b. If they 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:

●

No parameter

Figure 27.

Pcall16 response format

Response parameter:

●

Chip_ID of the SRI4K

Figure 28.

Pcall16 frame exchange between reader and SRI4K

SOF

Pcall16

CRCL

CRCH

EOF

AI07673b

06h

04h

8 bits

SOF

Chip_ID

CRCL

CRCH

EOF

AI07671

8 bits

SOF

06h

CRCL

CRCH EOF

AI10885b

Reader

SRI4K

SOF

Chip_ID

CRCL CRCH

EOF

<-t0-><-t1->

04h

SRI4K Datasheet(PDF) 28 Page - STMicroelectronics

SRI4K Datasheet(HTML) 28 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

Datasheet Download

Link URL