at42qt2100 ATMEL Corporation, at42qt2100 Datasheet - Page 41

• Manufacturer Part Number: at42qt2100
• Description: Qtouch Touch Sensor Ic
• Manufacturer: ATMEL Corporation

A.3
A.4
A.5
A.6
9554CX–AT42–11/11
Spread Spectrum Implementation
Component Retuning
Components
Proximity
Table A-1.
A SPREAD pin is provided which may be tied to Vdd or Ground via a resistor to enable/disable
spread-spectrum operation.
In general it is expected that unchanged sense components will show little difference with the
QT2100 for the same sensor electrodes as the QT1106, but there may be cases where
performance is improved by retuning component values of Cs and Rs to the application circuit.
An external oscillator is not required for QT2100.
On the QT2100 any of the keys can be configured as proximity sensors but see
on page 15
Pin
28
29
30
31
32
for the exception to this.
Pin-out Compatibility (Continued)
QT2100 Name
SNSKA
RESET
SNSB1
SNSKB
SNSB2
QT1106 Compatibility
SNSA
SNSB
AT42QT2100
Section 4.3.6
41