Datasheet

570
32133D–11/2011
UC3D
27.3 Block Diagram
Figure 27-1. CAT Block Diagram
27.4 I/O Lines Description
27.5 Product Dependencies
In order to use the CAT module, other parts of the system must be configured correctly, as
described below.
27.5.1 I/O Lines
The CAT pins may be multiplexed with other peripherals. The user must first program the I/O
Controller to give control of the pins to the CAT module.
Interface
Registers
Peripheral Bus
Finite State
Machine
Capacitor
Charge and
Discharge
Sequence
Generator
Counters
CSAn
I/O
Controller
P
i
n
s
CLK_CAT
SYNC
Capacitive Touch Module (CAT)
CSBn
Table 27-1. I/O Lines Description
Name Description Type
CSAn Capacitive sense A line n I/O
CSBn Capacitive sense B line n I/O
SYNC Synchronize signal Input