ADV
ANCEINFORMA
TION
TMS320F28377S, TMS320F28376S, TMS320F28375S, TMS320F28374S
SPRS881A – AUGUST 2014 – REVISED JUNE 2015
5.9.3.1
eQEP Electrical Data and Timing
shows the eQEP timing requirement and
shows the eQEP switching
characteristics.
Table 5-58. eQEP Timing Requirements
(1)
MIN
MAX
UNIT
Synchronous
2t
c(SYSCLK)
cycles
t
w(QEPP)
QEP input period
With input qualifier
2[1t
c(SYSCLK)
+ t
w(IQSW)
]
cycles
Synchronous
2t
c(SYSCLK)
cycles
t
w(INDEXH)
QEP Index Input High time
With input qualifier
2t
c(SYSCLK)
+ t
w(IQSW)
cycles
Synchronous
2t
c(SYSCLK)
cycles
t
w(INDEXL)
QEP Index Input Low time
With input qualifier
2t
c(SYSCLK)
+ t
w(IQSW)
cycles
Synchronous
2t
c(SYSCLK)
cycles
t
w(STROBH)
QEP Strobe High time
With input qualifier
2t
c(SYSCLK)
+ t
w(IQSW)
cycles
Synchronous
2t
c(SYSCLK)
cycles
t
w(STROBL)
QEP Strobe Input Low time
With input qualifier
2t
c(SYSCLK)
+ t
w(IQSW)
cycles
(1)
For an explanation of the input qualifier parameters, see
Table 5-59. eQEP Switching Characteristics
over recommended operating conditions (unless otherwise noted)
PARAMETER
MIN
MAX
UNIT
t
d(CNTR)xin
Delay time, external clock to counter increment
4t
c(SYSCLK)
cycles
t
d(PCS-OUT)QEP
Delay time, QEP input edge to position compare sync output
6t
c(SYSCLK)
cycles
Copyright © 2014–2015, Texas Instruments Incorporated
Specifications
119
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