MPR121_10 FREESCALE [Freescale Semiconductor, Inc], MPR121_10 Datasheet - Page 32

• Manufacturer Part Number: MPR121_10
• Description: Proximity Capactive touch Senosr controller
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

MPR121
32
Case 8
engage the button but the pen is calibrated out over time and, normal function resumes. The same applies to water, food humid
environments and other instances that generate capacitance change.
This case can also prevent keys from being stuck due to misuse. For example, if a metal pen touches a button, this may initially
C. Touch from new adjusted baseline
A. Valid normal touch
B. False touch filtered out
A
Figure 36.
B
C
Freescale Semiconductor
Baseline
Data
Sensors