Functional Block Diagram Of The Eqep Peripheral; Eqep Memory Map - Texas Instruments Concerto F28M36 Series Technical Reference Manual

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9.2.2 Functional Description
The eQEP peripheral contains the following major functional units (as shown in
• Programmable input qualification for each pin (part of the GPIO MUX)
• Quadrature decoder unit (QDU)
• Position counter and control unit for position measurement (PCCU)
• Quadrature edge-capture unit for low-speed measurement (QCAP)
• Unit time base for speed/frequency measurement (UTIME)
• Watchdog timer for detecting stalls (QWDOG)
Figure 9-4. Functional Block Diagram of the eQEP Peripheral
SYSCLKOUT
16
QCTMRLAT
QCPRDLAT
Registers
used by
multiple units
QEPCTL
QEPSTS
QFLG
EQEPxINT
PIE
32
QPOSLAT
QPOSSLAT
QPOSILAT

9.2.3 eQEP Memory Map

Table 9-1 lists the registers with their memory locations, sizes, and reset values.
Name
QPOSCNT
QPOSINIT
QPOSMAX
QPOSCMP
QPOSILAT
SPRUHE8E – October 2012 – Revised November 2019
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System
control registers
EQEPxENCLK
QCPRD
QCAPCTL QCTMR
16 16
Quadrature
capture unit
(QCAP)
QUTMR QWDTMR
QUPRD QWDPRD
32 16
UTOUT
UTIME QWDOG
WDTOUT
Position counter/
control unit
(PCCU)
32 32 16
QPOSCNT QEINT
QPOSCMP
QPOSINIT QFRC
QPOSMAX QCLR
QPOSCTL
Enhanced QEP (eQEP) peripheral
Table 9-1. EQEP Memory Map
Size(x16)/
Offset #shadow
0x00 2/0
0x02 2/0
0x04 2/0
0x06 2/1
0x08 2/0
Copyright © 2012–2019, Texas Instruments Incorporated
To CPU
QDECCTL
16
QCLK
QDIR
QI
Quadrature
QS
decoder
PHE (QDU)
PCSOUT
Reset Register Description
0x00000000 eQEP Position Counter
0x00000000 eQEP Initialization Position Count
0x00000000 eQEP Maximum Position Count
0x00000000 eQEP Position-compare
0x00000000 eQEP Index Position Latch
Description
Figure 9-4):
EQEPxAIN
EQEPxA/XCLK
EQEPxBIN
EQEPxIIN
EQEPxB/XDIR
EQEPxIOUT
GPIO
EQEPxIOE
MUX
EQEPxI
EQEPxSIN
EQEPxSOUT
EQEPxS
EQEPxSOE
C28 Enhanced QEP (eQEP) Module
861