AN3985 datasheet(31/105 Pages) STMICROELECTRONICS

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AN3985

ISO/IEC 15693 layer

Doc ID 022255 Rev 2

31/105

Table 41 describes the bit for Request flag if the inventory flag is reset (other command than

inventory).

Table 39.

Request flag bits description

Request flags

Inventory command

Subcarrier Data rate

Inventory = 1

Protocol

Extension

AFI

Address

Option RFU

Other command

Inventory = 0

Select

Nb slots

Option RFU

Table 40.

Request flag bits values

Bit

Value

Description

Subcarrier

A single subcarrier frequency is used.

Two subcarriers are used.

Data rate

Low data rate is used.

High data rate is used.

Inventory

Other command.

Inventory command.

Protocol Extension

RFU

Table 41.

Bit for request flag with inventory flag reset

Bit

Value

Description

Select

Request is executed in other state than Selected.

Request is executed only by the contactless tag in Selected state.

Data rate

Request is not addressed. UID field is not present.

Request is addressed. UID field is present. The request is executed only

by the contactless tag whose UID matches the UID specified in the

request.

Option

Depends on the command.

RFU

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