ATXMEGA8E5_14 datasheet(48/147 Pages) ATMEL

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XMEGA E5 [DATASHEET]

Atmel-8153I–AVR-ATxmega8E5-ATxmega16E5-ATxmega32E5_Datasheet–08/2014

26.

XCL – XMEGA Custom Logic Module

26.1

Features

Two independent 8-bit timer/counter with:

Period and compare channel for each timer/counter

Input Capture for each timer

Serial peripheral data length control for each timer

Timeout support for each timer

Timer underflow interrupt/event

Compare match or input capture interrupt/event for each timer

One 16-bit timer/counter by cascading two 8-bit timer/counters with:

Period and compare channel

Input capture

Timeout support

Timer underflow interrupt/event

Compare match or input capture interrupt/event

Programmable lookup table supporting multiple configurations:

Two 2-input units

One 3-input unit

RS configuration

Duplicate input with selectable delay on one input or output

Connection to external I/O pins, event system or one selectable USART

Combinatorial Logic Functions using programmable truth table:

AND, NAND, OR, NOR, XOR, XNOR, NOT, MUX

Sequential Logic Functions:

D-Flip-Flop, D Latch, RS Latch

Input sources:

From external pins or the event system

One input source includes selectable delay or synchronizing option

Can be shared with selectable USART pin locations

Outputs:

Available on external pins or event system

Includes selectable delay or synchronizing option

Can override selectable USART pin locations

Operates in active mode and all sleep modes

26.2

Overview

The XMEGA Custom Logic module (XCL) consists of two sub-units, each including 8-bit timer/counter with flexible

settings, peripheral counter working with one software selectable USART module, delay elements, glue logic with

programmable truth table and a global logic interconnect array.

The timer/counter configuration allows for two 8-bits timer/counters. Each timer/counter supports normal, compare and

input capture operation, with common flexible clock selections and event channels for each timer. By cascading the two

8-bit timer/counters, the XCL can be used as a 16-bit timer/counter.

The peripheral counter (PEC) configuration, the XCL is connected to one software selectable USART. This USART

controls the counter operation, and the PEC can optionally control the data length within the USART frame.

The glue logic configuration, the XCL implements two programmable lookup tables (LUTs). Each defines the truth table

corresponding to the logical condition between two inputs. Any combinatorial function logic is possible. The LUT inputs

can be connected to I/O pins or event system channels. If the LUT is connected to the USART0 pin locations, the data

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