CAP1014 datasheet(40/84 Pages) SMSC

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

Revision 1.65 (08-11-09)

SMSC CAP1014

DATASHEET

5.9

GPIO Status Register

The GPIO Status register bits are set whenever one of the GPIO inputs changes states. If the LEDx /

GPIOx pin is not configured as a GPIO or as an input, then the respective bit will be set to a logic ‘0’.

The bits are cleared when the register is read.

5.10

Group Status Register

The Group Status register indicates that one or more actions was detected on the Grouped sensors.

The detectable actions are described in Section 4.5.

Bit 7 - LID - Indicates that a Lid Closure Event has been detected. This bit is sticky. When it is set, it

will remain set until read. When a Lid Closure Event is detected, all new touches will be blocked.

Bit 6 - MULT - This bit is asserted if one or more touches are being blocked because greater than N

buttons are simultaneously pressed.

Bit 3 - UP - Indicates that a slide was detected on increasing sensors (i.e. Sensor 1 -> Sensor 2 ->

Sensor 3). This bit is also set if a touch (tap or press and hold event) is detected on the “Up” portion

of the slider. If the Group auto-repeat is enabled, then the ALERT pin will be periodically asserted while

a slide or press and hold event is detected. This bit will be cleared when read and re-set when another

interrupt is generated. This bit is cleared automatically if the DOWN bit is set.

Bit 2 - DOWN - Indicates that a slide was detected on decreasing sensors (i.e. Sensor 6 -> Sensor 5

-> Sensor 4). This bit is also set if a touch (tap or press and hold event) is detected on the “Down”

portion of the slider. If the Group auto-repeat is enabled, then the ALERT pin will be periodically

asserted while a slide or press and hold event is detected. This bit will be cleared when read and re-

set when another interrupt is generated. This bit is automatically cleared if the UP bit is set.

Bit 1 - TAP - Indicates that a tap was detected on one of the sensors within the Group. The relative

position of the tap is indicated by the UP and DOWN bits so that a tap on the “UP” side of the group

will assert the UP bit as well as the TAP bit. If the tap event is detected in the “center” of the slider

that is neither “UP” nor “DOWN” then the bit will be set however no interrupt will be generated. This

bit is sticky and will remain set until read.

Bit 0 - PH - Indicates that a press and hold event was detected on one of the sensors within the Group.

the relative position of the press is indicated by the UP and DOWN bits so a touch and hold on the

“UP” side of the group will assert the UP bit as well as the PH bit. If the press and hold event is

detected in the “center” of the slider that is neither “UP” nor “DOWN” then the bit will be set however

no interrupt will be generated. This bit is sticky and will remain set until read. If the condition is still

present, then this bit will be re-set when the interrupt is generated.

Table 5.12 GPIO Status Register

ADDR

R/W

B7B6

B5B4B3

DEFAULT

0Eh

R-C

GPIO Status

GPIO8_

STS

GPIO7_

STS

GPIO6_

STS

GPIO5_

STS

GPIO4_

STS

GPIO3_

STS

GPIO2_

STS

GPIO1_

STS

00h

Table 5.13 GPIO Status Register

ADDR

R/W

DEFAULT

0Fh

R-C

Group Status

LID

MULT

DOWN

TAP

00h

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