MPR031(2009) View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MPR031
(Rev.:2009)

Proximity Capacitive Touch Sensor Controller

Freescale Semiconductor 

2.3.8 Operation with Multiple Master

The application should use repeated starts to address the MPR03X to avoid bus confusion between I2C masters.On a I2C bus,

once a master issues a start/repeated start condition, that master owns the bus until a stop condition occurs. If a master that does

not own the bus attempts to take control of that bus, then improper addressing may occur. An address may always be rewritten

to fix this problem. Follow I2C protocol for multiple master configurations.

2.4 Register Address Map

Table 3. Register Address Map

Register

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

Register Address

0x00

0x02

0x03

0x04

0x05

0x06

0x07

0x1A

0x1B

0x1C

0x26

0x27

0x28

0x29

0x2A

0x2B

0x2C

0x2D

0x2E

0x41

0x43

0x44

Burst Mode

Auto-Increment

Address

Register Address + 1

0x00

Sensors

Freescale Semiconductor

MPR03X

7

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