Datasheet

39
[Not recommended for new designs - Use XMEGA A1U series] XMEGA A1 [DATASHEET]
8067O–AVR–06/2013
18. Hi-Res - High Resolution Extension
18.1 Features
 Increases Waveform Generator resolution by 2-bits (4x)
 Supports Frequency, single- and dual-slope PWM operation
 Supports the AWeX when this is enabled and used for the same Timer/Counter
18.2 Overview
TThe high-resolution (hi-res) extension can be used to increase the resolution of the waveform generation output from a
timer/counter by four or eight. It can be used for a timer/counter doing frequency, single-slope PWM, or dual-slope PWM
generation. It can also be used with the AWeX if this is used for the same timer/counter.
The hi-res extension uses the peripheral 4x clock (ClkPER4). The system clock prescalers must be configured so the
peripheral 4x clock frequency is four times higher than the peripheral and CPU clock frequency when the hi-res extension
is enabled.
There are four hi-res extensions that each can be enabled for each timer/counters pair on PORTC, PORTD, PORTE and
PORTF. The notation of these peripherals are HIRESC, HIRESD, HIRESE and HIRESF, respectively.