LRI512 Просмотр технического описания (PDF) - STMicroelectronics

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LRI512

Memory TAG IC 512 bit High Endurance EEPROM 13.56MHz, ISO 15693 Standard Compliant with E.A.S.

STMicroelectronics 

LRI512

INVENTORY

Command Code = 0x01

When receiving the Inventory request, the LRI512

performs the anti-collision sequence. The

Inventory_flag shall be set to 1. The Meaning of

Flags 5 to 8 is according to Table 13., Request

Flags 5 to 8 when Bit 3 = 1, on page 20. The Re-

quest (Table 21) contains:

– Flags,

– Inventory Command code

– AFI if the AFI flag is set

– Mask Length

– Mask Value

– CRC

The Response (Table 22) contains:

– Flags

– DSFID (always 00h)

– Unique ID

Note on Inventory Operation. In the current

LRI512 device, it is not possible to use the full

range of Mask Length capability to covert the com-

plete INVENTORY sequence. Values above the

ones mentioned are not allowed:

– 16 slots mode (Request flag b6=0): Mask

Length must be in the range 0 to 27.

– 1 slot mode (Request flag b6=1): Mask

Length must be in the range 0 to 20.

STMicroelectronics programs the UID in such a

way that it guarantees that the anti-collision se-

quence is able to detect all LRI512 in the reader

field.

Table 21. Inventory Request Format

Request

SOF

Request

Flags

Inventory Optional AFI Mask Length Mask Value

8 bits

0x01

8 bits

8 bits

0 - 64 bits

CRC16

16 bits

Request

EOF

Table 22. Inventory Response Format

Response

SOF

Response

Flags

DSFID

8 bits

0x00

UID

64 bits

CRC16

16 bits

Response

EOF

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