CAP1106

DS00001624B-page 20

 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. 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 Control Register

The Main Control register controls the primary power state of the device.

Bits 7 - 6 - GAIN[1:0] - Controls the gain used by the capacitive touch sensing circuitry. As the gain is increased, the

effective sensitivity is likewise increased as a smaller delta capacitance is required to generate the same delta count

values. The sensitivity settings may need to be adjusted along with the gain settings such that data overflow does not

occur.

APPLICATION NOTE: The gain settings apply to both Standby and Active states.

B2h

R

Sensor Input 2 Calibra-

tion

Stores the upper 8-bit calibration value

for sensor input 2

00h

Page 37

B3h

R

Sensor Input 3 Calibra-

tion

Stores the upper 8-bit calibration value

for sensor input 3

00h

Page 37

B4h

R

Sensor Input 4 Calibra-

tion

Stores the upper 8-bit calibration value

for sensor input 4

00h

Page 37

B5h

R

Sensor Input 5 Calibra-

tion

Stores the upper 8-bit calibration value

for sensor input 5

00h

Page 37

B6h

R

Sensor Input 6 Calibra-

tion

Stores the upper 8-bit calibration value

for sensor input 6

00h

Page 37

B9h

R

Sensor Input Calibra-

tion LSB 1

Stores the 2 LSBs of the calibration

value for sensor inputs 1 - 4

00h

Page 37

BAh

R

Sensor Input Calibra-

tion LSB 2

Stores the 2 LSBs of the calibration

value for sensor inputs 5- 6

00h

Page 37

FDh

R

Product ID

CAP1106

Stores a fixed value that identifies

each product

55h

Page 37

FEh

R

Manufacturer ID

Stores a fixed value that identifies

Microchip

5Dh

Page 38

FFh

R

Revision

Stores a fixed value that represents

the revision number

83h

Page 38

TABLE 6-2:

MAIN CONTROL REGISTER

ADDR

R/W

Register

B7

B6B5

B4

B3B2B1B0

Default

00h

R/W

Main Control

GAIN[1:0]

STBY

DSLEEP

-

-

-

INT

00h

TABLE 6-3:

GAIN BIT DECODE

GAIN[1:0]

Capacitive Touch Sensor Gain

10

00

1

01

2

10

4

11

8

TABLE 6-1:

REGISTER SET IN HEXADECIMAL ORDER (CONTINUED)

Register

Address

R/W

Register Name

Function

Default Value

Page