TCS3404, TCS3414

DIGITAL COLOR SENSORS

TAOS137A − APRIL 2011

13

The LUMENOLOGY

r Company

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Copyright

E 2011, TAOS Inc.

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Register Set

The TCS3404/14 is controlled and monitored by 18 user registers and a command register accessed through

the serial interface. These registers provide for a variety of control functions and can be read to determine results

of the ADC conversions. The register set is summarized in Table 2.

Table 2. Register Set

ADDRESS

REGISTER NAME

REGISTER FUNCTION

−−

COMMAND

Specifies register address

00h

CONTROL

Control of basic functions

01h

TIMING

Integration time/gain control

02h

INTERRUPT

Interrupt control

03h

INT SOURCE

Interrupt source

04h

ID

Part number/ Rev ID

07h

GAIN

ADC gain control

08h

LOW_THRESH_LOW_BYTE

Low byte of low interrupt threshold

09h

LOW_THRESH_HIGH_BYTE

High byte of low interrupt threshold

0Ah

HIGH_THRESH_LOW_BYTE

Low byte of high interrupt threshold

0Bh

HIGH_THRESH_HIGH_BYTE

High byte of high interrupt threshold

0Fh

−−

SMBus block read (10h through 17h)

10h

DATA1LOW

Low byte of ADC green channel

11h

DATA1HIGH

High byte of ADC green channel

12h

DATA2LOW

Low byte of ADC red channel

13h

DATA2HIGH

High byte of ADC red channel

14h

DATA3LOW

Low byte of ADC blue channel

15h

DATA3HIGH

High byte of ADC blue channel

16h

DATA4LOW

Low byte of ADC clear channel

17h

DATA4HIGH

High byte of ADC clear channel

The mechanics of accessing a specific register depends on the specific SMB protocol used. Refer to the section

on SMBus protocols on the previous pages. In general, the COMMAND register is written first to specify the

specific control/status register for following read/write operations.