MPR081

Sensors

4

Freescale Semiconductor

Figure 2. MPR081 Pinout

Table 6. Pin Description

Pin

Name

Function

1RST

Reset Input. Active low clears the 2-wire interface and puts the device in the same

condition as power-up reset.

2IRQ

Interrupt Output. IRQ is the active-low open-drain interrupt output signalling new events.

3

VDD

Positive Supply Voltage Bypass VDD to VSS with a 0.1µF ceramic capacitor

4

VSS

Ground

5

SCL

I²C-Compatible Serial Clock Input

6

SDA

I²C-Compatible Serial Data I/O

7

AD0

Address input 0. Connect to VSS to select device slave address 0x4C. Connect to VDD

to select device slave address 0x4D.

8

SOUNDER

Sounder driver output. Connect a piezo-ceramic sounder from this output to ground.

Output is push-pull.

9 - 16

RNW, RW, RSW, RS,

RSE, RE, RNE, RN

Rotary Touch Inputs. Connect the 8 inputs to a 16-position rotary sensor.

PAD

Exposed Pad

Exposed Pad on Package Underside (QFN only). Connect to VSS.

RS

RSW

RW

RNW

VDD

VSS

RST

IRQ

MPR081Q

1

8

7

6

5

4

3

2

13

14

15

16

12

9

10

11

RN

RNE

RE

RSE

RS

RSW

RW

RNW

VDD

VSS

SCL

SDA

AD0

SOUNDER

RST

IRQ

MPR081EJ

1

4

3

2

5

8

7

6

16

13

14

15

12

9

10

11