Microchip Technology dsPIC30F - Section 16. Quadrature Encoder Interface (Qei)

© 2004 Microchip Technology Inc. DS70063C-page 16-1
Quadrature Encoder
Interface (QEI)
16
Section 16. Quadrature Encoder Interface (QEI)
HIGHLIGHTS
This section of the manual contains the following major topics:
16.1 Module Introduction ..................................................................................................... 16-2
16.2 Control and Status Registers ....................................................................................... 16-4
16.3 Programmable Digital Noise Filters ............................................................................. 16-9
16.4 Quadrature Decoder .................................................................................................. 16-10
16.5 16-bit Up/Down Position Counter............................................................................... 16-12
16.6 Using QEI as an Alternate 16-bit Timer/Counter........................................................ 16-16
16.7 Quadrature Encoder Interface Interrupts ................................................................... 16-17
16.8 I/O Pin Control ........................................................................................................... 16-18
16.9 QEI Operation During Power Saving Modes ............................................................. 16-19
16.10 Effects of a Reset....................................................................................................... 16-19
16.11 Design Tips ................................................................................................................ 16-21
16.12 Related Application Notes.......................................................................................... 16-22
16.13 Revision History ......................................................................................................... 16-23