Datasheet

Figure 29-1. QEI Block Diagram
Quadrature
Encoder
Velocity
Predivider
Interrupt Control
QEIINTEN
QEIRIS
QEIISC
Position Integrator
QEIMAXPOS
QEIPOS
Velocity Accumulator
QEICOUNT
QEISPEED
Velocity Timer
QEILOAD
QEITIME
PhA
PhB
IDX
clk
dir
Interrupt
Control & Status
QEICTL
QEISTAT
Figure 29-2 on page 2012 shows the logic that is provided to allow the PhAn and PhBn signals to be
inverted and/or swapped.
2011December 13, 2013
Texas Instruments-Advance Information
Tiva
™
TM4C129XNCZAD Microcontroller