LRIS2K datasheet(42/102 Pages) STMICROELECTRONICS

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Modes

LRIS2K

42/102

Modes

The term “mode” refers to the mechanism used in a request to specify the set of LRIS2Ks

that will answer the request.

14.1

Addressed mode

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

(UID) of the addressed LRIS2K.

Any LRIS2K that receives a request with the Address_flag set to 1 compares the received

Unique ID to its own. If it matches, then the LRIS2K executes the request (if possible) and

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

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

14.2

Non-addressed mode (general request)

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

a Unique ID. Any LRIS2K receiving a request with the Address_flag cleared to 0 executes it

and returns a request to the VCD as specified in the command description.

14.3

Select mode

When the Select_flag is set to 1 (Select mode), the request does not contain an LRIS2K

Unique ID. The LRIS2K in the Selected state that receives a request with the Select_flag set

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

Only LRIS2Ks in the Selected state answer a request where the Select_flag set to 1.

The system design ensures in theory that only one LRIS2K can be in the Select state at a

time.

LRIS2K 数据表(PDF) 42 Page - STMicroelectronics