XC2000 datasheet(47/647 Pages) INFINEON

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XC2000 Derivatives

System Units (Vol. 1 of 2)

Architectural Overview

Preliminary

User’s Manual

2-19

V1.0, 2007-06

ArchitectureX2K, V1.0

Capture/Compare Units CCU6

The CCU6 units support generation and control of timing sequences on up to three 16-

bit capture/compare channels plus one independent 16-bit compare channel.

In compare mode, the CCU6 units provide two output signals per channel which have

inverted polarity and non-overlapping pulse transitions (deadtime control). The compare

channel can generate a single PWM output signal and is further used to modulate the

capture/compare output signals.

In capture mode the contents of compare timer T12 is stored in the capture registers

upon a signal transition at pins CCx.

The output signals can be generated in edge-aligned or center-aligned PWM mode.

They are generated continuously or in single-shot mode.

Compare timers T12 and T13 are free running timers which are clocked by the prescaled

system clock.

For motor control applications (brushless DC-drives) both subunits may generate

versatile multichannel PWM signals which are basically either controlled by compare

timer T12 or by a typical hall sensor pattern at the interrupt inputs (block commutation).

The latter mode provides noise filtering for the hall inputs and supports automatic

rotational speed measurement.

The trap function offers a fast emergency stop without CPU activity. Triggered by an

external signal (CTRAP) the outputs are switched to selectable logic levels which can be

adapted to the connected power stages.

Note: The number of available CCU6 units and channels depends on the selected

device type.

XC2000 Datasheet(PDF) 47 Page - Infineon Technologies AG