KITMPR03XEVM Freescale Semiconductor, KITMPR03XEVM Datasheet - Page 9

• Manufacturer Part Number: KITMPR03XEVM
• Description: KIT EVAL FOR MPR03X
• Manufacturer: Freescale Semiconductor

Specifications of KITMPR03XEVM

• Sensor Type: Touch, Capacitive
• Interface: I²C
• Voltage - Supply: 1.71 V ~ 2.75 V
• Embedded: Yes, Other
• Utilized Ic / Part: MPR031
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Description/function: Proximity Sensor
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: MPR031, MPR032

Sensors
Freescale Semiconductor
4
4.1
MPR03X’s operation modes are Stop, Run1, and Run2. Stop mode is the start-up and configuration mode.
4.2
In Stop mode, the MPR03X does not monitor any of the electrodes. This mode is the lowest power state.
4.2.1
On power-up, the device is in Stop mode, registers are reset to the initial values shown in
mode drawing minimal supply current. The user configurable pin IRQ/ELE2 defaults to being the interrupt output IRQ function.
IRQ is reset on power-up, and so defaults to logic high. Since the IRQ is an open-drain output, IRQ will be high impedance.
4.2.2
In order to set the configuration registers, the device must be in stop mode. This is achieved by setting the EleEn field in the
Electrode Configuration register to zero.
Table 4. Power-Up Register Configurations
Touch Status Register
ELE0 Filtered Data Low Register
ELE0 Filtered Data High Register
ELE1 Filtered Data Low Register
ELE1 Filtered Data High Register
ELE2 Filtered Data Low Register
ELE2 Filtered Data High Register
ELE0 Baseline Value Register
ELE1 Baseline Value Register
ELE2 Baseline Value Register
Max Half Delta Register
Noise Half Delta Register
Noise Count Limit Register
ELE0 Touch Threshold Register
ELE0 Release Threshold Register
ELE1 Touch Threshold Register
ELE1 Release Threshold Register
ELE2 Touch Threshold Register
ELE2 Release Threshold Register
AFE Configuration Register
Filter Configuration Register
Electrode Configuration Register
Modes of Operation
Introduction
Stop Mode
Initial Power Up
Stop Mode Usage
Register
Cleared
Cleared
Cleared
Cleared
Cleared
Cleared
Cleared
Cleared
Cleared
Cleared
Max Half Delta set to 1
Noise Half Delta Amount set to 1
Noise Count Limit set to 1
Threshold set to 1
Threshold set to 1
Threshold set to 1
Threshold set to 1
Threshold set to 1
Threshold set to 1
6 AFE samples, 16µA charge current
6 touch detection samples, 16ms
detection sample interval
Stop mode. ELE2/IRQ pin is interrupt
function,
Power-Up Condition
Register Address
Table
0x1A
0x1B
0x1C
0x2A
0x2B
0x2C
0x2D
0x2E
0x00
0x02
0x03
0x04
0x05
0x06
0x07
0x26
0x27
0x28
0x29
0x41
0x43
0x44
4, and MPR03X starts in Stop
HEX Value
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x08
0x04
0x00
MPR03X
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