AN3985 datasheet(52/105 Pages) STMICROELECTRONICS

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ISO/IEC 15693 layer

AN3985

52/105

Doc ID 022255 Rev 2

5.4.5

Get functions

ISO15693_Get_Subcarrier_Flag function

This function returns the subcarrier flag determining if the contactless tag's response is

made with one or two subcarriers.

ISO15693_Get_DataRate_Flag function

This function returns the datarate flag determining if the contactless tag's response is made

at a high or low datarate.

ISO15693_Get_Inventory_Flag function

This function returns the inventory flag to determine if the contactless tag should run the

anti-collision sequence (inventory command).

Table 83.

ISO15693_Get_Subcarrier_Flag function description

Prototype

u8 ISO15693_Get_Subcarrier_Flag(const u8

Request_flags);

Input parameter

Request_flags: information flags containing the data.

Output parameter

None

Return parameter

ISO15693_SINGLE_SUBCARRIER: The tag must answer with a single

subcarrier.

ISO15693_TWO_SUBCARRIER: The tag must answer with two subcarriers.

Table 84.

ISO15693_Get_DataRate_Flag function description

Prototype

u8 ISO15693_Get_DataRate_Flag(const u8

Request_flags);

Input parameter

Request_flags: information flags containing the data

Output parameter

None

Return parameter

ISO15693_LOW_DATARATE: Low data rate shall be used.

ISO15693_HIGH_DATARATE: High data rate shall be used.

Table 85.

ISO15693_Get_Inventory_Flag function description

Prototype

u8 ISO15693_Get_Inventory_Flag(const u8

Request_flags);

Input parameter

Request_flags: information flags containing the data

Output parameter

None

Return parameter

ISO15693_SELECT_FLAG_RESET: This request flag is not dedicated to the

inventory command.

ISO15693_INVENTORY_FLAG_SET: This request flag is dedicated to the

inventory command.

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