ATXMEGA8E5 datasheet(41/153 Pages) MICROCHIP

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Data Sheet Complete

DS40002059A-page 41

ATxmega32E5/16E5/8E5

There are two differences between timer/counter type 4 and type 5. Timer/counter 4 has four CC channels, and timer/coun-

ter 5 has two CC channels. Both timer/counter 4 and 5 can be set in 8-bit mode, allowing the application to double the

number of compare and capture channels that then get 8-bit resolution.

Some timer/counters have extensions that enable more specialized waveform generation. The waveform extension (WeX)

is intended for motor control, ballast, LED, H-bridge, power converters, and other types of power control applications. It

enables more customized waveform output distribution, and low- and high-side channel output with optional dead-time

insertion. It can also generate a synchronized bit pattern across the port pins. The high-resolution (hi-res) extension can

increase the waveform resolution by four or eight times by using an internal clock source four times faster than the periph-

eral clock. The fault extension (FAULT) enables fault protection for safe and deterministic handling, disabling and/or shut

down of external drivers.

A block diagram of the 16-bit timer/counter with extensions and closely related peripheral modules (in grey) is shown in Fig-

ure 17-1.

Figure 17-1. 16-bit Timer/counter and Closely Related Peripherals

PORTC has one timer/counter 4 and one timer/counter 5. PORTD has one timer/counter 5. Notation of these are TCC4

(timer/counter C4), TCC5, and TCD5, respectively.

Compare/Capture Channel D

Compare/Capture Channel C

Compare/Capture Channel B

Compare/Capture Channel A

Waveform

Generation

Buffer

Comparator

Capture

Control

Base Counter

Counter

Control Logic

Timer Period

Prescaler

Event

System

Timer/Counter

clkPER4

clkPER

WeX

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