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dsPIC33AK512MPS512 Family Data Sheet
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21
Quadrature Encoder Interface (QEI)
21.4
Operation
Operating Conditions
High-Performance dsPIC33A DSP/RISC CPU
Memory Features
Security Features
High-Speed PWM
High-Speed Analog-to-Digital Converters
Peripheral Features
Controller Features
Analog Features
Safety Features
Functional Safety Support
Qualification
Programming and Debug Interfaces
dsPIC33AK512MPS512
Family Features
Pin Diagrams
1
Pinout I/O Descriptions
2
Device Overview
3
Guidelines for Getting Started with Digital Signal Controllers
4
CPU
5
Memory Organization
6
Data Memory
7
Flash Program Memory
8
Configuration Bits
9
Security Module
10
Resets
11
Interrupt Controller
12
I/O Ports with Edge Detect
13
Oscillator Module
14
Direct Memory Access (DMA) Controller
15
CAN Flexible Data-Rate (FD) Protocol Module
16
High-Resolution PWM with Fine Edge Placement
17
40 MSPS Analog-to-Digital Converter (ADC)
18
Effects of Reset
19
Integrated Touch Controller (ITC)
20
High-Speed Analog Comparator with Slope Compensation DAC
21
Quadrature Encoder Interface (QEI)
21.1
Device-Specific Information
21.2
Architectural Overview
21.3
Register Summary
21.4
Operation
21.4.1
Position Counter
21.4.2
Quadrature Count Mode
21.4.3
External Count with External Up/Down Mode
21.4.4
External Count with External Gate Mode
21.4.5
Internal Timer Mode
21.4.6
Velocity Counter
21.4.7
Index Counter
21.4.8
Interval Timer
21.4.9
Initialization/Capture Register
21.4.10
Position Comparator
21.4.11
Index Event
21.4.12
Position Counter Initialization Modes
21.4.13
Digital Input Filter
21.5
Application Example
21.6
Interrupts
21.7
QEI Operation in Power-Saving Modes
22
Universal Asynchronous Receiver Transmitter (UART)
23
Serial Peripheral Interface (SPI)
24
Inter-Integrated Circuit (I
2
C)
25
Single-Edge Nibble Transmission (SENT)
26
Bidirectional Serial Synchronous (BiSS) Module
27
Timers
28
Capture/Compare/PWM/Timer Modules (SCCP/MCCP)
29
Configurable Logic Cell (CLC)
30
Peripheral Trigger Generator (PTG)
31
32-Bit Programmable Cyclic Redundancy Check (CRC) Generator
32
Current Bias Generator (CBG)
33
UREF Reference Output
34
Operational Amplifier (Op Amp)
35
Watchdog Timer (WDT)
36
Deadman Timer (DMT)
37
Device Power-Saving Modes
38
JTAG Interface
39
In-Circuit Debugger
40
Instruction Set Summary
41
Development Support
42
Electrical Characteristics
43
Packaging Information
44
Revision History
45
Product Identification System
Microchip Information
21.4 Operation
