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MPR083 Datasheet(PDF) 4 Page - Freescale Semiconductor, Inc |
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MPR083 Datasheet(HTML) 4 Page - Freescale Semiconductor, Inc |
4 / 35 page MPR083 Sensors 4 Freescale Semiconductor Preliminary 2 External Signal Description 2.1 Device Pin Assignment Table 3 shows the pin assignment for the MPR083. For a more detailed description of the functionality of each pin, refer to the appropriate chapter. The two packages available for the MPR083 are a 5x5mm 16 pin QFN and a 4x5mm 16 pin TSSOP. Both of the packages and their respective pinouts are shown in Figure 3. Figure 3. Package Pinouts 2.2 Recommended System Connections The MPR083 Capacitive Touch Sensor Controller requires ten external passive components. When connecting the MPR083 in a touch sensor system, the electrode lines must have pull-up resistors. The recommended value for these pull-ups is 780k Ω. Some electrode arrays will require higher or lower values depending on the application. In addition to the 8 resistors, a bypass capacitor of 10µF should always be used between the VDD and VSS lines and a 4.7 Ωk pull-up resistor should be included on the IRQ. Table 3. Device Pin Assignment Pin Name Function 1ATTN Attention Pin. Input, active low when asserted sets the Configuration Register’s DCE bit high allowing communication with the part. 2IRQ Interrupt Request Pin. Output, active-low, open-drain interrupt request signaling new events. 3 VDD Positive Supply Voltage 4 VSS Ground 5SCL I2C Serial Clock 6SDA I2C Serial Data 7 AD0 Address input. Low = slave address 0x4C. High = slave address 0x4D. 8 SOUNDER Sounder driver output. Connect a piezo sounder from this output to ground. Output is push-pull 9 - 16 E1, E2, E3, E4, E5, E6, E7, E8 Rotary Electrode connections. PAD Exposed pad Exposed pad on package underside (QFN only). Connect to VSS. E5 E6 E7 E8 VDD VSS ATTN IRQ 3 4 1 2 10 9 12 11 78 56 14 13 16 15 E1 E2 E3 E4 E5 E6 E7 E8 VDD VSS SCL SDA AD0 SOUNDER ATTN IRQ 1 4 3 2 5 8 7 6 16 13 14 15 12 9 10 11 QFN TSSOP |
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Similar Description - MPR083 |
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