MPR081EJ FREESCALE [Freescale Semiconductor, Inc], MPR081EJ Datasheet
MPR081EJ
Related parts for MPR081EJ
MPR081EJ Summary of contents
Page 1
... Rev 0, 06/2007 MPR081 Touch Pad Controller Bottom View 16-LEAD QFN CASE 1679 16-LEAD TSSOP CASE 948F Top View RS RST MPR081Q RSW IRQ VDD RW VSS RNW RST RN RNE IRQ VDD RE MPR081EJ VSS RSE SCL RS SDA RSW AD0 RW SOUNDER RNW Figure 1. Pin Connections ...
Page 2
Table 1. Absolute Maximum Ratings Rating Voltage (with respect to VSS) VDD All other pins Operating Temperature Range Storage Temperature Range Table 2. ESD and Latch-Up Protection Characteristics Rating Human Body Model Machine Model Charge Device Model Latch-Up Current at ...
Page 3
Table Characteristics ( Typical Operating Circuit 1 3 Characteristic Serial Clock Frequency Bus Timeout Bus Free Time Between a STOP and a START Condition Hold Time, (Repeated) START Condition ...
Page 4
... 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. RST IRQ VDD RS VSS RSW SCL RW SDA RNW AD0 SOUNDER Figure 2. MPR081 Pinout RN RNE RE MPR081EJ RSE RS RSW RW RNW Sensors Freescale Semiconductor ...
Page 5
MASKS INTERRUPT IRQ SET CONTROLLER RATE CLEAR SDA SCL SERIAL INTERFACE RST AD0 SOUNDER SOUNDER CONTROLLER Sensors Freescale Semiconductor ROTARY ROTARY POSITION POSITION 8 8 DECODER Figure 3. Internal Block Diagram N NNW NNE NE NW NEE ...
Page 6
FUNCTIONAL OVERVIEW The MPR081user interface controller monitors various combinations of capacitive touch pads, capacitive sliders, capacitive rotaries, and mechanical keys. The device includes a piezo buzzer driver which generates key click sounds to provide audible feedback of pad touches and/or ...
Page 7
SERIAL-ADDRESSING The MPR081 operates as a slave that sends and receives 2 data through 2-wire interface. The interface uses a serial data line (SDA) and a serial clock line (SCL) to achieve Figure 4. 2-Wire Serial Interface ...
Page 8
ACKNOWLEDGE The acknowledge bit is a clocked 9th bit the recipient uses to handshake receipt of each byte of data. Thus each byte transferred effectively requires 9 bits. The th master generates the 9 clock pulse, and the recipient pulls ...
Page 9
Any bytes received after the command byte are data bytes. The first data byte goes into the internal register of the MPR081 selected by the command byte Figure 10. Command and Single Data Byte Received If multiple data bytes are ...
Page 10
INTERRUPT CONTROLLER AND IRQ OUTPUT The IRQ pin is an open-drain, latching interrupt output which automatically alerts changes to a user-configurable combination of keyswitches and/or touch pads. IRQ requires an external pullup resistor, which can be connected to any voltage ...
Page 11
Table 10. FIFO Register Format Register (1) FIFO Register FIFO Status Clear the FIFO. Subsequent reads without any intervening addition(s) to the FIFO will return 1'b0100000 This data is not the last FIFO item. FIFO has not overflowed. This data ...
Page 12
Table 11. Fault Register Format Register Read Fault Register Write Fault Register No faults have been detected on the electrode inputs One or more electrode inputs is detected as shorted to V One or more electrode inputs is detected as ...
Page 13
Table 14. Sensitivity Register Format Register Read Number of Position Register Write Number of Position Register Sensitivity setting is level 1 Sensitivity setting is level 2 Sensitivity setting is level 3 Sensitivity setting is level 4 Sensitivity setting is level ...
Page 14
Table 17. Sounder Configuration Register Format Register Read Sounder Configuration Register Write Sounder Configuration Register Globally disable sounder output Globally enable sounder output Sounder frequency is 1 kHz Sounder frequency is 2 kHz Sounder click period Sounder ...
Page 15
Table 19. Configuration Register Format Register Read Configuration Register Write Configuration Register MPR081 is in shutdown, and will not scan the rotary. Note that FIFO contents are not cleared when entering shutdown and can be read any time during shutdown. ...
Page 16
MPR081 16 PACKAGE DIMENSIONS CASE 1679-01 ISSUE O 16-LEAD QFN PAGE Sensors Freescale Semiconductor ...
Page 17
Sensors Freescale Semiconductor PACKAGE DIMENSIONS CASE 1679-01 ISSUE O 16-LEAD QFN PAGE MPR081 17 ...
Page 18
MPR081 18 PACKAGE DIMENSIONS CASE 1679-01 ISSUE O 16-LEAD QFN PAGE Sensors Freescale Semiconductor ...
Page 19
Sensors Freescale Semiconductor PACKAGE DIMENSIONS CASE 948F-01 ISSUE B 16-LEAD TSSOP PAGE MPR081 19 ...
Page 20
MPR081 20 PACKAGE DIMENSIONS CASE 948F-01 ISSUE B 16-LEAD TSSOP PAGE Sensors Freescale Semiconductor ...
Page 21
Sensors Freescale Semiconductor PACKAGE DIMENSIONS CASE 948F-01 ISSUE B 16-LEAD TSSOP PAGE MPR081 21 ...
Page 22
How to Reach Us: Home Page: www.freescale.com Web Support: http://www.freescale.com/support USA/Europe or Locations Not Listed: Freescale Semiconductor, Inc. Technical Information Center, EL516 2100 East Elliot Road Tempe, Arizona 85284 +1-800-521-6274 or +1-480-768-2130 www.freescale.com/support Europe, Middle East, and Africa: Freescale Halbleiter ...