TCS3404, TCS3414

DIGITAL COLOR SENSORS

TAOS137A − APRIL 2011

26

r

r

Copyright

E 2011, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

APPLICATION INFORMATION: SOFTWARE

When the INTEG_MODE field value is set to 11b, the device integrates from the rising edge of the first pulse

until the rising or falling edge of a subsequent pulse as specified by the SYNC_EDGE and PARAM field values.

See example timing diagrams below. ADC_EN must be toggled (i.e. from high to low and back to high again)

before the next integration cycle. With this device feature, the SYNC IN input pin can be used to synchronize

the device with an external light source (e.g. LED).

SYNC IN

Integration

Period

INTERRUPT

AB

NOTES: 1. Rising edge of second SYNC IN pulse required to terminate integration cycle

2. ADC_EN must be toggled (i.e. from high to low and back to high again) before next integration cycle

Figure 24. Integrate Over One Pulse (SYNC_EDGE 1b, INTEG_MODE 11b, PARAM 0b) Rising Edge

1.

Enable ADC_EN (= 1)

2.

Set SYNC EDGE to 1

3.

Set PARAM for SYNC PULSE COUNT of 1

4.

Set INTEG_MODE to 11b

5.

Input two external SYNC pulses

6.

Disable SYNC and read channels