CAP1114 datasheet(41/102 Pages) MICROCHIP

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

SMSC CAP1114

Revision 1.1 (02-04-11)

DATASHEET

6.1

Main Status Control Register

The Main Status and Control Register controls the primary power state of the device.

Bit 6 - DEACT - Deactivates all sensor scanning and LED activity.

‘0’ - (default) - Sensor scanning is active and LEDs are functional.

‘1’ - All sensor scanning is disabled and all linked LEDs are disabled (see Section ). The only way

to restart scanning is to clear this bit. The status registers are automatically cleared and the INT

bit is cleared.

Bit 5 - SLEEP - Enables Sleep state by deactivating the LED activity and scanning those sensors

enabled via the Sleep Control register.

‘0’ (default) - Sensor scanning is active and LEDs are functional.

‘1’ - All LEDs are disabled (except LED11) and the Capacitive Touch Sensor scanning is limited to

the sensors set in the Sleep Channel Control register (see Section 6.22). The status registers will

not be cleared.

Bit 4 - DSLEEP - Enables the Deep Sleep state by deactivating all functions.

‘0’ (default) - Sensor scanning is active and LEDs are functional.

‘1’ - All sensor scanning is disabled. Except for LED11, all LEDs are driven to their programmed

non-actuated state and no PWM operations will be done. The device will return to its previous

power state when the ALERT pin is driven to its active level (see Section 5.7). The status registers

are automatically cleared and the INT bit is cleared. SMBus communications targeted at the

CAP1114 will bring the device out of deep sleep and automatically clear this bit.

Bit 1 - PWR_LED - Controls the output of LED11 based on the state of bits 5 and 4.

‘0’ (default) - The LED11 output is in the “inactive” or off state.

‘1’ - The LED11 output is active in one of the following conditions:

a. Both bits 4 and 5 are set to a logic ‘0’. The LED will behave as defined by the LED11_CTL

bits (see Section ).

b. Either bit 4 or bit 5 is set to a logic ‘1’. The LED will behave as defined by the LED11_ALT

bits (see Section ).

Bit 0 - INT - Indicates that there is an interrupt. This bit is only set if the ALERT pin has been asserted.

If a channel detects a press and its associated interrupt enable bit is set to a logic ‘0’, no action is

taken.

This bit is cleared by writing a logic ‘0’ to it. When this bit is cleared, the ALERT pin will be deasserted

and all status registers will be cleared if the condition has been removed.

‘0’ - No interrupt pending.

‘1’ - A button press has been detected on one or more channels and the interrupt has been

asserted.

Table 6.2 Main Status Control Register

ADDR

R/W

DEFAULT

00h

R/W

Main Status

Control

DEACT

SLEEP

DSLEEP

PWR_

LED

INT

00h

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