CAP1206 datasheet(24/63 Pages) MICROCHIP

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CAP1206

DS00001567B-page 24

 2013-2015 Microchip Technology Inc.

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 character-

istics.

When a bit is “set”, this means it’s at a logic ‘1’. When a bit is “cleared”, this means it’s at a logic ‘0’.

5.1

Main Control Register

The Main Control register controls the primary power state of the device (see Section 4.1, "Power States").

Bit 5 - STBY - Enables Standby.

• ‘0’ (default) - The device is not in the Standby state.

• ‘1’ - The device is in the Standby state. Capacitive touch sensor input scanning is limited to the sensor inputs set in

the Standby Channel register (see Section 5.20, "Standby Channel Register"). The status registers will not be

cleared until read. Sensor inputs that are no longer sampled will flag a release and then remain in a non-touched

state.

Bit 4 - DSLEEP - Enables Deep Sleep.

• ‘0’ (default) - The device is not in the Deep Sleep state.

• ‘1’ - The device is in the Deep Sleep state. All sensor input scanning is disabled. The status registers are automat-

ically cleared and the INT bit is cleared. When this bit is set, the STBY bit has no effect.

Bit 0 - INT - Indicates that there is an interrupt (see Section 4.8, "Interrupts"). When this bit is set, it asserts the ALERT#

pin. If a channel detects a touch but interrupts are not enabled for that channel (see Section 5.11, "Interrupt Enable Reg-

ister"), 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’ - An interrupt condition occurred, and the ALERT# pin has been asserted.

5.2

Status Registers

All status bits are cleared when the device enters Deep Sleep (DSLEEP = ‘1’ - see Section 5.1, "Main Control Register").

5.2.1

GENERAL STATUS - 02H

Bit 6 - BC_OUT - Indicates that the base count is out of limit for one or more enabled sensor inputs (see Section 4.4,

"Sensor Input Calibration"). This bit will not be cleared until all enabled sensor inputs have base counts within the limit.

• ‘0’ - All enabled sensor inputs have base counts in the operating range.

• ‘1’ - One or more enabled sensor inputs has the base count out of limit. A status bit is set in the Base Count Out of

Limit Register (see Section 5.16, "Base Count Out of Limit Register").

TABLE 5-2:

MAIN CONTROL REGISTER

Addr

R/W

Default

00h

R/W

Main Control

STBY

DSLEEP

INT

00h

TABLE 5-3:

STATUS REGISTERS

Addr

R/W

Default

02h

General Status

BC_

OUT

ACAL

_FAIL

PWR

MULT

MTP

TOUCH

00h

03h

Sensor Input

Status

CS6

CS5

CS4

CS3

CS2

CS1

00h

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