MPR081 Datasheet, PDF (1/22 Pages) Freescale Semiconductor, Inc – Touch Pad Controller

Freescale Semiconductor
Technical Data
Touch Pad Controller
The MPR081 is a user interface controller which manages a 16-position rotary
touch pad. The MPR081 uses an I²C interface to communicate with the host,
which configures the operation, and an interrupt to advise the host of status
changes.
The interrupt output, IRQ, indicates that rotary status has changed since the
MPR081 was last read. The maximum interrupt frequency can be limited to
sacrifice system response time in favor of power consumption for systems that
wake up out of sleep to respond to interrupts.
Features
• 1.8 V to 3.6 V operation
• 150 µA average supply current (all touch pads being monitored)
• 1 µA standby current
• Supports a 16-position rotary interface
• Proprietary false touch rejection technology
• Ongoing pad analysis and detection not reset by EMI events
• Rotary data changes are delivered from a FIFO for shortest access time
• IRQ output advises when FIFO has data
• System can set interrupt behavior as immediate after event, or program a
minimum time between successive interrupts
• Current rotary position is always available on demand for polling-based
systems
• Sounder drive provides audible feedback to simulate mechanical key clicks
• Digital output (I²C with custom addressing)
• 16-pin QFN and TSSOP packages
• -40°C to +85°C operating temperature range
Implementations
• Control Panels
• Switch Replacements
• Rotary and Linear Sliders
• Touch Pads
Typical Applications
• Appliances
• PC Peripherals
• Access Controls
• MP3 Players
• Remote Controls
• Mobile Phones
Device Name
MPR081Q
MPR081EJ
ORDERING INFORMATION
Temperature
Range
Case
Number
-40°C to +85°C
1679
(16-Lead QFN)
948F
(16-Lead TSSOP)
Rotary
Slider
16-Positions
MPR081
Rev 0, 06/2007
MPR081
Touch Pad Controller
Bottom View
16-LEAD QFN
CASE 1679
16-LEAD TSSOP
CASE 948F
Top View
RST
RS
IRQ
MPR081Q
RSW
VDD
RW
VSS
RNW
RST
IRQ
VDD
VSS
SCL
SDA
AD0
SOUNDER
MPR081EJ
RN
RNE
RE
RSE
RS
RSW
RW
RNW
Figure 1. Pin Connections
© Freescale Semiconductor, Inc., 2007. All rights reserved.