MPR03X

Sensors

Freescale Semiconductor

7

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

Register Address

Burst Mode

Auto-Increment

Address

Touch Status Register

0x00

Register Address + 1

ELE0 Filtered Data Low Register

0x02

ELE0 Filtered Data High Register

0x03

ELE1 Filtered Data Low Register

0x04

ELE1 Filtered Data High Register

0x05

ELE2 Filtered Data Low Register

0x06

ELE2 Filtered Data High Register

0x07

ELE0 Baseline Value Register

0x1A

ELE1 Baseline Value Register

0x1B

ELE2 Baseline Value Register

0x1C

Max Half Delta Register

0x26

Noise Half Delta Register

0x27

Noise Count Limit Register

0x28

ELE0 Touch Threshold Register

0x29

ELE0 Release Threshold Register

0x2A

ELE1 Touch Threshold Register

0x2B

ELE1 Release Threshold Register

0x2C

ELE2 Touch Threshold Register

0x2D

ELE2 Release Threshold Register

0x2E

AFE Configuration Register

0x41

Filter Configuration Register

0x43

Electrode Configuration Register

0x44

0x00