M263 datasheet(312/398 Pages) NUVOTON

312 / 398 page

M261/M262/M263

Mar 25, 2020

Page 312 of 398

Rev 1.02

6.14

Quadrature Encoder Interface (QEI)

6.14.1

Overview

There are two Quadrature Encoder Interfaces (QEI) QEI controllers in this device. The QEI decodes

speed of rotation and motion sensor information and can be used in any application that uses a

quadrature encoder for feedback.

6.14.2

Features

6.14.2.1

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 be lower than PCLK/4



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

M263 Datasheet(PDF) 312 Page - Nuvoton Technology Corporation

M263 Datasheet(HTML) 312 Page - Nuvoton Technology Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL