CAP1214 datasheet(68/107 Pages) MICROCHIP

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

Revision 1.0 (08-30-10)

SMSC CAP1214

DATASHEET

Bits 5-4 - CS7_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 7.

Bits 3-2 - CS6_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 6.

Bits 1-0 - CS5_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 5.

6.30.3

Lid Closure Threshold 3 Register

The Lid Closure Threshold 3 Register controls the lid closure threshold for Capacitive Touch Sensors

9 - 12.

Bits 7-6 - CS12_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 12 (one

of the grouped sensors).

Bits 5-4 - CS11_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 11 (one

of the grouped sensors).

Bits 3-2 - CS10_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 10 (one

of the grouped sensors).

Bits 1-0 - CS9_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 9 (one of

the grouped sensors).

6.30.4

Lid Closure Threshold 4 Register

The Lid Closure Threshold 4 Register controls the lid closure threshold for Capacitive Touch Sensors

13 - 14.

Bits 3-2 - CS14_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 14 (one

of the grouped sensors).

Bits 1-0 - CS13_LD_TH[1:0] - Controls the lid closure threshold for Capacitive Touch Sensor 13 (one

of the grouped sensors).

6.31

Slider Velocity Configuration Register

The Slider Velocity Configuration Register controls the speed sensitive behaviors of the slider, allowing

the number of interrupts to be increased as the slide speed increases.

Bit 7 - ACC_INT_EN - Enables the device to generate extra interrupts after an accelerated slide has

been detected.

‘0’ - The device will not generate extra interrupts during or after the slide has been detected.

‘1’ (default) - The device will generate extra interrupts after an accelerated slide is detected. The

number of extra interrupts generated will be proportional to the speed of the accelerated slide but

will not exceed the maximum number of extra interrupts as determined by the MAX_INT bits.

Bits 6-4 - MAX_INT[2:0] - (default 100b) Determine the maximum number of extra interrupts that will

be generated after a single slide (regardless of length). The variable “T” is the actual slide time and

the parameter SLIDE_TIME is set by bits [3:2] of this register.

Table 6.45 Slider Velocity Configuration Register

ADDR

R/W

DEFAULT

3Eh

R/W

Slider Velocity

Configuration

ACC_

INT_EN

MAX_INT[2:0]

SLIDE_TIME

[1:0]

RPT_SCALE

[1:0]

C5h

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