Texas Instruments TM4C1294NCPDT - Figure 24-1. QEI Block Diagram

Figure 24-1. 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 24-2 on page 1750 shows the logic that is provided to allow the PhAn and PhBn signals to be
inverted and/or swapped.
1749June 18, 2014
Texas Instruments-Production Data
Tiva
™
TM4C1294NCPDT Microcontroller