mpr081 Freescale Semiconductor, Inc, mpr081 Datasheet - Page 4

• Manufacturer Part Number: mpr081
• Description: Touch Pad Controller
• Manufacturer: Freescale Semiconductor, Inc

MPR081
4
Table 6. Pin Description
9 - 16
PAD
VDD
VSS
RST
IRQ
Pin
1
2
3
4
5
6
7
8
1
2
3
4
16
5
MPR081Q
RNW, RW, RSW, RS,
RSE, RE, RNE, RN
15
6
Exposed Pad
SOUNDER
Name
14
RST
VDD
VSS
SDA
SCL
AD0
7
IRQ
13
8
12
11
10
9
RS
RSW
RW
RNW
Reset Input. Active low clears the 2-wire interface and puts the device in the same
condition as power-up reset.
Interrupt Output. IRQ is the active-low open-drain interrupt output signalling new events.
Positive Supply Voltage Bypass VDD to VSS with a 0.1µF ceramic capacitor
Ground
I²C-Compatible Serial Clock Input
I²C-Compatible Serial Data I/O
Address input 0. Connect to VSS to select device slave address 0x4C. Connect to VDD
to select device slave address 0x4D.
Sounder driver output. Connect a piezo-ceramic sounder from this output to ground.
Output is push-pull.
Rotary Touch Inputs. Connect the 8 inputs to a 16-position rotary sensor.
Exposed Pad on Package Underside (QFN only). Connect to VSS.
Figure 2. MPR081 Pinout
SOUNDER
RST
IRQ
VDD
VSS
SDA
SCL
AD0
Function
1
2
3
4
5
6
7
8
MPR081EJ
Freescale Semiconductor
16
15
14
13
12
11
10
9
RN
RNE
RE
RSE
RS
RSW
RW
RNW
Sensors