Datasheet

816
32142D–06/2013
ATUC64/128/256L3/4U
31.8 Module Configuration
The specific configuration the CAT module is listed in the following tables.The module bus
clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
31.8.1 Resistive Drive
By default, the CAT pins are driven with normal I/O drive properties. Some of the CSA and CSB
pins can optionally drive with a 1k output resistance for improved EMC.
To enable resistive drive on a pin, the user must write a one to the corresponding bit in the CSA
Resistor Control Register (CSARES) or CSB Resistor Control Register (CSBRES) register.
Table 31-4. CAT Configuration
Feature CAT
Number of touch sensors/Size of matrix
Allows up to 17 touch sensors, or up to 16 by 8
matrix sensors to be interfaced.
Table 31-5. CAT Clocks
Clock Name Description
CLK_CAT Clock for the CAT bus interface
GCLK The generic clock used for the CAT is GCLK4
Table 31-6. Register Reset Values
Register Reset Value
VERSION 0x00000400
PARAMETER 0x0001FFFF