TCS34721 datasheet(21/40 Pages) AMSCO

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[v1-02] 2016-Feb-08

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TCS3472 − Register Description

Command Register

The command register specifies the address of the target

Figure 25:

Command Register

76543

CMD

TYPE

ADDR/SF

Fields

Bits

Description

CMD

Select Command Register. Must write as 1 when addressing COMMAND register.

TYPE

6:5

Selects type of transaction to follow in subsequent data transfers:

FIELD VALUE

TRANSACTION TYPE

Repeated byte protocol transaction

Auto-increment protocol transaction

Reserved — Do not use

Special function — See description below

Byte protocol will repeatedly read the same register with each data access. Block

protocol will provide auto-increment function to read successive bytes.

ADDR/SF

4:0

Address field/special function field. Depending on the transaction type, see above,

this field either specifies a special function command or selects the specific

control-status-data register for subsequent read and write transactions. The field

values listed below only apply to special function commands:

FIELD VALUE

READ VALUE

00110

Clear channel interrupt clear

Other

Reserved — Do not write

The Clear channel interrupt clear special function clears any pending interrupt and

is self-clearing.

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