0
1
1
0
QA
QB
1
1
0
0
QDECCTL:QBP
Quadrature
decoder
00
01
10
11
iCLK
xCLK
xCLK
xCLK
01
11
10
00
iDIR
xDIR
1
0
QDECCTL:QSRC
2
QFLG:PHE
PHE
QDECCTL:QAP
x1
x2
x1, x2
QDECCTL:XCR
0
1
1
0
QDECCTL:QIP
QDECCTL:IGATE
QCLK
QDIR
QI
1
0
QDECCTL:QSP
0
1
QDECCTL:SPSEL
QDECCTL:SPSEL
1
0
QDECCTL:SOEN
QS
PCSOUT
EQEPxIOE
EQEPxSOE
EQEPxIOUT
EQEPxSOUT
EQEPxSIN
EQEPxIIN
EQEPxBIN
EQEPxAIN
QDECCTL:SWAP
QEPSTS:QDF
EQEPA
EQEPB
Enhanced Quadrature Encoder Pulse (eQEP) Module
15.4.2.3 Quadrature Decoder Unit (QDU)
shows a functional block diagram of the QDU.
Figure 15-133. Functional Block Diagram of Decoder Unit
1655
SPRUH73H – October 2011 – Revised April 2013
Pulse-Width Modulation Subsystem (PWMSS)
Copyright © 2011–2013, Texas Instruments Incorporated