Datasheet

TMS320C28346, TMS320C28345, TMS320C28344
TMS320C28343, TMS320C28342, TMS320C28341
SPRS516D –MARCH 2009–REVISED AUGUST 2012 www.ti.com
6.11.5 Enhanced Quadrature Encoder Pulse (eQEP) Timing
Table 6-25 shows the eQEP timing requirement and Table 6-26 shows the eQEP switching
characteristics.
Table 6-25. Enhanced Quadrature Encoder Pulse (eQEP) Timing Requirements
(1)
TEST CONDITIONS MIN MAX UNIT
t
w(QEPP)
QEP input period Asynchronous
(2)
/synchronous 2t
c(SCO)
cycles
With input qualifier 2[1t
c(SCO)
+ t
w(IQSW)
] cycles
t
w(INDEXH)
QEP Index Input High time Asynchronous
(2)
/synchronous 2t
c(SCO)
cycles
With input qualifier 2t
c(SCO)
+ t
w(IQSW)
cycles
t
w(INDEXL)
QEP Index Input Low time Asynchronous
(2)
/synchronous 2t
c(SCO)
cycles
With input qualifier 2t
c(SCO)
+ t
w(IQSW)
cycles
t
w(STROBH)
QEP Strobe High time Asynchronous
(2)
/synchronous 2t
c(SCO)
cycles
With input qualifier 2t
c(SCO)
+ t
w(IQSW)
cycles
t
w(STROBL)
QEP Strobe Input Low time Asynchronous
(2)
/synchronous 2t
c(SCO)
cycles
With input qualifier 2t
c(SCO)
+ t
w(IQSW)
cycles
(1) For an explanation of the input qualifier parameters, see Table 6-12.
(2) Refer to the TMS320C2834x Delfino MCU Silicon Errata (literature number SPRZ267) for limitations in the asynchronous mode.
Table 6-26. eQEP Switching Characteristics
PARAMETER TEST CONDITIONS MIN MAX UNIT
t
d(CNTR)xin
Delay time, external clock to counter increment 4t
c(SCO)
cycles
t
d(PCS-OUT)QEP
Delay time, QEP input edge to position compare sync 6t
c(SCO)
cycles
output
130 Electrical Specifications Copyright © 2009–2012, Texas Instruments Incorporated
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