UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
1065 of 1441
NXP Semiconductors
UM10503
Chapter 34: LPC43xx/LPC43Sxx Quadrature Encoder Interface (QEI)
Fig 118.Encoder interface block diagram
Digital Filter
dir
clk _
pulse
Inx
gating
Windowing
Inx_
pulse
id
x
Ph
a
Ph
b
Quad Decoder
Velocity Counter
Velocity Capture
Velocity Compare
Velocity Reload
Velocity Timer
tim _int
rst
rst
rst
Position Counter
Position Compare
Index Counter
Index Compare
velc _int
rev 0_ int
rev 1_ int
rev 2_ int
max _pos _int
err _int
enclk _int
dir _int
inx _int
MaxPos Compare
pos 0rev _int
pos 1rev _int
pos 2rev _int
PC
L
K
pos 0rev _int
pos 1rev _int
pos 2rev _int