SRT512 datasheet(31/46 Pages) STMICROELECTRONICS

部件名	SRT512

功能描述	13.56 MHz short-range contactless memory chip with 512-bit EEPROM and anticollision functions

PDF	46 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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31 / 46 page

SRT512

SRT512 commands

Doc ID 13277 Rev 4

31/46

8.4

Select(Chip_ID) command

Command code = 0Eh

The Select() command allows the SRT512 to enter the Selected state. Until this command is

issued, the SRT512 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 SRT512 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 31.

Select request format

Request parameter:

●

8-bit Chip_ID stored during the anticollision sequence

Figure 32.

Select response format

Response parameters:

●

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

Figure 33.

Select frame exchange between reader and SRT512

SOF

Select

CRCL

CRCH

EOF

AI07677b

0Eh

8 bits

Chip_ID

SOF

Chip_ID

CRCL

CRCH

EOF

AI07671

8 bits

AI13510b

Reader

SRT512

SOF

Chip_ID

CRCL CRCH EOF

<-t0-> <-t1->

SOF

0Eh

CRCL

CRCH EOF

Chip_ID

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