ams Datasheet

Page 27

[v1-31] 2018-Apr-04

Document Feedback

TCS3771 − Principles of Operation

Enable Register (0x00)

The Enable Register is used primarily to power the TCS3771

device on and off, and enable functions and interrupts as shown

in Figure 30.

Figure 30:

Enable Register

Note(s):

1. A minimum interval of 2.4ms must pass after PON is asserted before either a proximity or an RGBC can be initiated. This required

time is enforced by the hardware in cases where the firmware does not provide it.

7

6

5432

10

Reserved

PIEN

AIEN

WEN

PEN

AEN

PON

Field

Bits

Description

Reserved

7:6

Reserved. Write as 0.

PIEN

5

Proximity interrupt enable. When asserted, permits proximity interrupts to be

generated.

AIEN

4

RGBC interrupt enable. When asserted, permits RGBC interrupts to be generated.

WEN

3

Wait enable. This bit activates the wait feature. Writing a 1 activates the wait timer.

Writing a 0 disables the wait timer.

PEN

2

Proximity enable. This bit activates the proximity function. Writing a 1 enables

proximity. Writing a 0 disables proximity.

AEN

1

RGBC enable. This bit actives the two-channel ADC. Writing a 1 activates the RGBC.

Writing a 0 disables the RGBC.

PON (1)

0

Power ON. This bit activates the internal oscillator to permit the timers and ADC

channels to operate. Writing a 1 activates the oscillator. Writing a 0 disables the

oscillator. During reads and writes over the I2C interface, this bit is temporarily

overridden and the oscillator is enabled, independent of the state of PON.