LRI2K datasheet(34/89 Pages) STMICROELECTRONICS

34 / 89 page

Modes

LRI2K

34/89

Modes

The term “mode” refers to the mechanism used in a request to specify the set of LRI2Ks that

will answer the request.

12.1

Addressed mode

When the Address_flag is set to 1 (Addressed mode), the request contains the Unique ID

(UID) of the addressed LRI2K.

Any LRI2K that receives a request with the Address_flag set to 1 compares the received

Unique ID to its own. If it matches, then the LRI2K executes the request (if possible) and

returns a response to the VCD as specified in the command description.

If its UID does not match, then it remains silent.

12.2

Non-Addressed mode (general request)

When the Address_flag is set to 0 (Non-Addressed mode), the request does not contain a

Unique ID. Any LRI2K receiving a request with the Address_flag set to 0 executes it and

returns a response to the VCD as specified in the command description.

12.3

Select mode

When the Select_flag is set to 1 (Select mode), the request does not contain an LRI2K

Unique ID. The LRI2K in the Selected state that receives a request with the Select_flag set

to 1 executes it and returns a response to the VCD as specified in the command description.

Only LRI2Ks in the Selected state answer to a request where the Select Flag is set to 1.

The system design ensures in theory that only one LRI2K can be in the Select state at a

time.

LRI2K Datasheet(PDF) 34 Page - STMicroelectronics