TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801, UCD9501
TMS320C2802, TMS320C2801, and TMS320F2801x DSPs
www.ti.com
SPRS230H–OCTOBER 2003–REVISED JUNE 2006
4.5 Enhanced QEP Modules (eQEP1/2)
The 280x device contains up to two enhanced quadrature encoder (eQEP) modules. See the
TMS320x280x Enhanced Quadrature Encoder (eQEP) Module Reference Guide (literature number
SPRU790) for more details.
System
control registers
To CPU
EQEPxENCLK
SYSCLKOUT
QCPRD
QCAPCTL
16
QCTMR
16
16
Quadrature
capture unit
(QCAP)
QCTMRLAT
QCPRDLAT
QUTMR
QUPRD
QWDTMR
QWDPRD
Registers
used by
multiple units
32
16
QEPCTL
QEPSTS
QFLG
UTOUT
UTIME
QWDOG
QDECCTL
16
WDTOUT
EQEPxAIN
EQEPxBIN
EQEPxIIN
EQEPxINT
16
QCLK
QDIR
QI
EQEPxA/XCLK
EQEPxB/XDIR
EQEPxI
PIE
Position counter/
control unit
(PCCU)
Quadrature
decoder
(QDU)
EQEPxIOUT
EQEPxIOE
EQEPxSIN
EQEPxSOUT
EQEPxSOE
QS
GPIO
MUX
QPOSLAT
QPOSSLAT
QPOSILAT
PHE
PCSOUT
EQEPxS
32
32
16
QPOSCNT
QPOSINIT
QPOSMAX
QEINT
QFRC
QPOSCMP
QCLR
QPOSCTL
Enhanced QEP (eQEP) peripheral
Figure 4-6. eQEP Functional Block Diagram
58
Peripherals
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