QFLG:WTOQWDPRD
16
QWDTMR
16
QEPCTL:WDE
QWDOG
RESET
SYSCLKOUT
/64
SYSCLKOUT
QCLK
WDTOUT
eQEP Watchdog
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SPRUI07–March 2020
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Enhanced Quadrature Encoder Pulse (eQEP)
Parameter Relevant Register to Configure or Read the Information
T Unit Period Register (QUPRD)
ΔX Incremental Position = QPOSLAT(k) - QPOSLAT(K-1)
X Fixed unit position defined by sensor resolution and ZCAPCTL[UPPS] bits
ΔT Capture Period Latch (QCPRDLAT)
6.7 eQEP Watchdog
The eQEP peripheral contains a 16-bit watchdog timer that monitors the quadrature-clock to indicate
proper operation of the motion-control system. The eQEP watchdog timer is clocked from
SYSCLKOUT/64 and the quadrate clock event (pulse) resets the watchdog timer. If no quadrature-clock
event is detected until a period match (QWDPRD = QWDTMR), then the watchdog timer will time out and
the watchdog interrupt flag will be set (QFLG[WTO]). The time-out value is programmable through the
watchdog period register (QWDPRD).
Figure 6-18. eQEP Watchdog Timer
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