SRI4K datasheet(30/45 Pages) STMICROELECTRONICS

부품명	SRI4K

상세설명	13.56 MHz short-range contactless memory chip with 4096-bit EEPROM and anticollision functions

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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SRI4K commands

SRI4K

30/45

8.4

Select(Chip_ID) command

Command code = 0Eh

The Select() command allows the SRI4K to enter the Selected state. Until this command is

issued, the SRI4K will not accept any other command, except for Initiate(), Pcall16() and

Slot_marker(). The Select() command returns the 8 bits of the Chip_ID value. An SRI4K in

Selected state, that receives a Select() command with a Chip_ID that does not match its

own is automatically switched to Deselected state.

Figure 32.

Select request format

Request parameter:

●

8-bit Chip_ID stored during the anticollision sequence

Figure 33.

Select response format

Response parameters:

●

Chip_ID of the selected tag. Must be equal to the transmitted Chip_ID

Figure 34.

Select frame exchange between reader and SRI4K

SOF

Select

CRCL

CRCH

EOF

AI07677b

0Eh

8 bits

Chip_ID

SOF

Chip_ID

CRCL

CRCH

EOF

AI07671

8 bits

AI010887

Reader

SRI4K

SOF

Chip_ID

CRCL CRCH EOF

<-t0-><-t1->

SOF

0Eh

CRCL

CRCH EOF

Chip_ID

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