AX58200 datasheet(72/180 Pages) ASIX

72 / 180 page

AX58200

EtherCAT Slave Controller SoC

Quadrature Encoder Interface (QEI)

2.14.1 Overview

There are two QEI controllers in this device. The Quadrature Encoder Interface (QEI) decodes speed of rotation

and motion sensor information. It can be used in any application that uses a quadrature encoder for feedback.

2.14.2 Features

2.14.2.1 Quadrature Encoder Interface (QEI) Features

⚫

Up to two QEI controllers, QEI0 and QEI1.

⚫

Two QEI phase inputs, QEA and QEB; One Index input.

⚫

A 32-bit up/down Quadrature Encoder Pulse Counter (QEI_CNT)

⚫

A 32-bit software-latch Quadrature Encoder Pulse Counter Hold Register (QEI_CNTHOLD)

⚫

A 32-bit Quadrature Encoder Pulse Counter Index Latch Register (QEI_CNTLATCH)

⚫

A 32-bit Quadrature Encoder Pulse Counter Compare Register (QEI_CNTCMP) with a Pre-set

Maximum Count Register (QEI_CNTMAX)

⚫

One QEI control register (QEI_CTL) and one QEI Status Register (QEI_STATUS)

⚫

Four Quadrature encoder pulse counter operation modes

–

Support x4 free-counting mode

–

Support x2 free-counting mode

–

Support x4 compare-counting mode

–

Support x2 compare-counting mode

⚫

Encoder Pulse Width measurement mode

⚫

Input frequency of QEA/QEB/IDX without noise filter must lower than PCLK/4

⚫

Input frequency of QEA/QEB/IDX with noise filter must lower than Noise Filter Clk/8

AX58200 Folha de dados(PDF) 72 Page - ASIX Electronics Corporation