CAP1214 datasheet(41/107 Pages) MICROCHIP

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

SMSC CAP1214

Revision 1.0 (08-30-10)

DATASHEET

During Power-On-Reset (POR), the default values are stored in the registers. A POR is initiated when

power is first applied to the part and the voltage on the VDD supply surpasses the POR level as

specified in the electrical characteristics. Any reads to undefined registers will return 00h. Writes to

undefined registers will not have an effect.

When a bit is “set”, this means that the user writes a logic ‘1’ to it. When a bit is “cleared”, this means

that the user writes a logic ‘0’ to it.

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 6.51). 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 5.8). The status registers

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

CAP1214 will bring the device out of deep sleep and automatically clear this bit.

FEh

Manufacturer ID

Stores a fixed value that identifies

SMSC

5Dh

Page 45

FFh

Revision

Stores a fixed value that

represents the revision number

80h

Page 101

Table 6.2 Main Status Control Register

ADDR

R/W

DEFAULT

00h

R/W

Main Status

Control

DEACT

SLEEP

DSLEEP

PWR_

LED

INT

00h

Table 6.1 Register Set in Hexadecimal Order (continued)

ADDRESS

R/W

FUNCTION

DEFAULT

VALUE

PAGE

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