CAP1214 datasheet(45/107 Pages) MICROCHIP

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

SMSC CAP1214

Revision 1.0 (08-30-10)

DATASHEET

6.4.2

Volumetric Data

If they are setup to present Volumetric Data (see Section 6.14), the bits will encode a range from 0 to

100. This value is updated based on the Grouped sensor activity:

A slide in the “UP” direction will increase the volumetric data by the Volumetric Step setting (see

Section 6.6) whenever an interrupt is generated (including extra interrupts generated after the slide

is complete).

A slide in the “DOWN” direction will decrease the volumetric data by the Volumetric Step setting

(see Section 6.6) whenever an interrupt is generated (including extra interrupts generated after the

slide is complete)

A tap (see Section 5.5.1) on the “UP” side will increase the volumetric data by a value of 1.

A tap on the “DOWN” side will decrease the volumetric data by a value of 1.

A press and hold (see Section 5.5.2) on the “UP” side will increase the volumetric data by a value

of 1 at every repeat rate interval.

A press and hold (see Section 5.5.2) on the “DOWN” side will decrease the volumetric data by a

value of 1 at every repeat rate interval.

The bits are read / write.

6.5

Vendor ID Register

The Vendor ID Register stores an 8-bit value that represents SMSC.

6.6

Volumetric Step Register

The Volumetric Step Register controls the size of a step to the volumetric data when a slide is detected

in the UP and DOWN directions.

Bits 3 - 0 - VOL_STEP[3:0] - Determines the volumetric data step when a slide is detected. Each LSB

corresponds to a value of ±1.

Table 6.7 Vendor ID Register

ADDR

R/W

B7B6B5B4B3B2B1B0

DEFAULT

08h

Vendor ID

01011101

5Dh

FEh

Table 6.8 Volumetric Step Register

ADDR

R/W

DEFAULT

09h

R/W

Volumetric Step

----

VOL_STEP[3:0]

01h

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