CAP1293 datasheet(26/63 Pages) MICROCHIP

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CAP1293

DS00001566B-page 26

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• ‘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 5.17, "Base Count Out of Limit Register").

Bit 5 - ACAL_FAIL - Indicates analog calibration failure 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 successfully completed analog cali-

bration.

• ‘0’ - All enabled sensor inputs were successfully calibrated.

• ‘1’ - One or more enabled sensor inputs failed analog calibration. A status bit is set in the Calibration Active Regis-

ter (see Section 5.10.1, "Calibration Activate and Status Register").

Bit 4 - PWR - Indicates that the designated power button has been held for the designated time (see Section 4.6, "Power

Button"). This bit will cause the INT bit to be set. This bit is cleared when the INT bit is cleared if there is no longer a

touch on the power button.

• ‘0’ - The power button has not been held for the required time or is not enabled.

• ‘1’ - The power button has been held for the required time.

Bit 2 - MULT - Indicates that the device is blocking detected touches due to the Multiple Touch detection circuitry (see

Section 5.14, "Multiple Touch Configuration Register"). This bit will not cause the INT bit to be set and hence will not

cause an interrupt.

Bit 1 - MTP - Indicates that the device has detected a number of sensor inputs that exceed the MTP threshold either via

the pattern recognition or via the number of sensor inputs (see Section 5.15, "Multiple Touch Pattern Configuration Reg-

ister"). This bit will cause the INT bit to be set if the MTP_ALERT bit is also set. This bit is cleared when the INT bit is

cleared if the condition that caused it to be set has been removed.

Bit 0 - TOUCH - Indicates that a touch was detected. This bit is set if any bit in the Sensor Input Status register is set.

5.2.2

SENSOR INPUT STATUS - 03H

The Sensor Input Status Register stores status bits that indicate a touch has been detected. A value of ‘0’ in any bit

indicates that no touch has been detected. A value of ‘1’ in any bit indicates that a touch has been detected.

All bits are cleared when the INT bit is cleared and if a touch on the respective capacitive touch sensor input is no longer

present. If a touch is still detected, the bits will not be cleared (but this will not cause the interrupt to be asserted).

Bit 2 - CS3 - Indicates that a touch was detected on Sensor Input 3.

Bit 1 - CS2 - Indicates that a touch was detected on Sensor Input 2.

Bit 0 - CS1 - Indicates that a touch was detected on Sensor Input 1.

TABLE 5-5:

STATUS REGISTERS

Addr

R/W

Default

02h

General Status

BC_

OUT

ACAL

_FAIL

PWR

MULT

MTP

TOUCH

00h

03h

Sensor Input

Status

CS3

CS2

CS1

00h

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