Touch Sensor Controller Integrates Sounder Drive and I²C Configuration

Page Contents:   [ Featured Products | Datasheets | Application Notes | Buy Now ]

The MPR083/4 proximity capacitive touch sensor controllers are designed to detect the state of capacitive touch pads.

Freescale Semiconductor’s MPR084 and MPR083 offer designers a cost efficient alternative to mechanical push switches and mechanical rotary switches respectively.

An I²C interface is included to communicate with a host to configure the operation and an interrupt advises the host of status changes. The MPR083/4 also includes a piezo sounder drive which provides audible feedback to simulate mechanical key clicks.

The MPR08X family has several implementations, including control panels and switch replacements. The MPR083 controls rotary and linear sliders. The MPR084 controls up to eight touch pads. Other members of the MPR08X family are well suited for other application interface situations, such as individual touch pads or rotary/touch pad combinations.

 

FEATURES 1.8V - 3.6V operation 150µA average supply current (all touch pads being monitored) 10µA standby current Support for 8-position rotary interface Proprietary false touch rejection technology Ongoing pad analysis and detection that is not reset by EMI events 16-pin QFN and TSSOP packages Operating temperature range: -40°C to +85°C

APPLICATIONS Appliances PC peripherals Access controls MP3 players and portable consoles Remote controls Mobile phones

 

 

MPR083: 8-Position Rotary

The MPR083 is an Inter-Integrated Circuit Communication (I²C) driven Capacitive Touch Sensor Controller, optimized to manage an 8-position rotary shaped capacitive array. The device can accommodate a wide range of implementations through 3 output mechanisms, and many configurable options.

 

 

FEATURES 1.8V to 3.6V operation 150µA average supply current 25µA low power mode Variable low power mode response time (10ms – 10s) Rejects unwanted multi-key detections from EMI events such as PA bursts or user handling Ongoing pad analysis and detection is not reset by EMI events Data is buffered in 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 output can be enabled to generate key-click sound when rotary is touched Two hardware selectable I2C addresses allowing two devices on a single I2C bus Configurable real-time auto calibration 5mm x 5mm x 1mm 16 lead QFN package -40°C to +85°C operating temperature range

 

 

MPR084: 8-Pad Touch Sensor Controller

The MPR084 is an Inter-Integrated Circuit Communication (I²C) driven Capacitive Touch Sensor Controller, optimized to manage an 8-touch pad capacitive array. The device can accommodate a wide range of implementations through 3 output mechanisms, and many configurable options.

 

 

 

FEATURES 1.8V to 3.6V operation 150µA average supply current 25µA low power mode Variable low power mode response time (10ms – 10s) Rejects unwanted multi-key detections from EMI events such as PA bursts or user handling Ongoing pad analysis and detection is not reset by EMI events Data is buffered in 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 touched pad position is always available on demand for polling-based systems Sounder output can be enabled to generate key-click sound when pad is touched Two hardware selectable I2C addresses allowing two devices on a single I2C bus Configurable real-time auto calibration 5mm x 5mm x 1mm 16 lead QFN package -40°C to +85°C operating temperature range

 

KITMPR083EVM: 8-Position Rotary MPR083 Evaluation Board

This evaluation kit features the MPR083 proximity sensor controller that is intended for applications where non-contact sensing of objects is desired. The kit allows for designers to easily evaluate the MPR083 in any application, specifically capacitive touch sensing. The connector offers access to all electrodes, enabling you to connect the touch pad board or any other electrode design of your choosing.

 

FEATURES Sample electrode board demonstrates rotational sliders Machined plastic cover for front panel non-contact touch evaluation Access to all 8 electrodes A Graphical User Interface that gives the user the ability to set many operational parameters USB connectivity

KIT CONTAINS MPR083 Evaluation Kit Hardware: MPR083 Proximity Sensor Controller and an MC68HC908JB8JDW microcontroller Sample rotary pads Plastic cover for rotary Standard 15 pin header LEDs – 1 for PWR, 1 per pad Resistors – for each electrode Processor – MC68HC908JB8JDW 8 pad Rotary – Reference design USB connectivity for power and PC access USB cable   DVD CONTENTS PC application for evaluating electrodes Firmware for the MC908QB8 microcontroller Datasheet, fact sheets, application notes Schematic of demonstration board Bill of material and instructions

 

 

KITMPR084EVM: 8-Pad Touch MPR084 Evaluation Board

This evaluation kit features the MPR084 proximity sensor controller that is intended for applications where non-contact sensing of objects is desired. The kit allows for designers to easily evaluate the MPR084 in any application, specifically capacitive touch sensing. The connector offers access to all electrodes, enabling you to connect the touch pad board or any other electrode design of your choosing.

 

FEATURES Sample electrode board demonstrates key pad touch sensor Machined plastic cover for front panel non-contact touch evaluation Access to all 8 electrodes A Graphical User Interface that gives the user the ability to set many operational parameters USB connectivity

KIT CONTAINS MPR084 Evaluation Kit Hardware: MPR084 Proximity Sensor Controller and an MC68HC908JB8JDW microcontroller Sample key pads Plastic cover for key pads Standard 15 pin header LEDs – 1 for PWR, 1 per pad Resistors – for each electrode Processor – MC68HC908JB8JDW 8 key pad – Reference design USB connectivity for power and PC access USB cable   DVD CONTENTS PC application for evaluating electrodes Firmware for the MC908QB8 microcontroller Datasheet, fact sheets, application notes Schematic of demonstration board Bill of material and instructions

 

 

 Featured Products

Part Number		Description	Data Sheet	App. Notes
KITMPR083EVM		Evaluation Kit for the MPR083 8-Position Rotary Touch Wheel Controller
KITMPR084EVM		Evaluation Kit for the MPR084 8-Pad Touch Sensor Controller
MPR083EJ		8-Position Rotary Touch Wheel Controller
MPR083Q		8-Position Rotary Touch Wheel Controller
MPR084EJ		8-Pad Touch Sensor Controller

refers to New Product Introduction