MPR081EJ FREESCALE [Freescale Semiconductor, Inc], MPR081EJ Datasheet - Page 4

• Manufacturer Part Number: MPR081EJ
• Description: Touch Pad Controller
• Manufacturer: FREESCALE [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
MPR081Q
RNW, RW, RSW, RS,
RSE, RE, RNE, RN
Exposed Pad
SOUNDER
Name
RST
VDD
VSS
SDA
SCL
AD0
IRQ
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
MPR081EJ
Freescale Semiconductor
RN
RNE
RE
RSE
RS
RSW
RW
RNW
Sensors