TMS320F28335, TMS320F28334, TMS320F28332
TMS320F28235, TMS320F28234, TMS320F28232
www.ti.com
SPRS439M –JUNE 2007–REVISED AUGUST 2012
6.10.5 Enhanced Quadrature Encoder Pulse (eQEP) Timing
Table 6-26 shows the eQEP timing requirement and Table 6-27 shows the eQEP switching
characteristics.
Table 6-26. Enhanced Quadrature Encoder Pulse (eQEP) Timing Requirements(1)
TEST CONDITIONS
Asynchronous(2)/synchronous
With input qualifier
MIN
MAX
UNIT
cycles
cycles
cycles
cycles
cycles
cycles
cycles
cycles
cycles
cycles
tw(QEPP)
QEP input period
2tc(SCO)
2[1tc(SCO) + tw(IQSW)
]
tw(INDEXH)
tw(INDEXL)
tw(STROBH)
tw(STROBL)
QEP Index Input High time
QEP Index Input Low time
QEP Strobe High time
QEP Strobe Input Low time
Asynchronous(2)/synchronous
2tc(SCO)
2tc(SCO) + tw(IQSW)
2tc(SCO)
With input qualifier
Asynchronous(2)/synchronous
With input qualifier
Asynchronous(2)/synchronous
2tc(SCO) + tw(IQSW)
2tc(SCO)
2tc(SCO) + tw(IQSW)
2tc(SCO)
With input qualifier
Asynchronous(2)/synchronous
With input qualifier
2tc(SCO) + tw(IQSW)
(1) For an explanation of the input qualifier parameters, see Table 6-13.
(2) Refer to the TMS320F28335, TMS320F28334, TMS320F28332, TMS320F28235, TMS320F28234, TMS320F28232 DSC Silicon Errata
(literature number SPRZ272) for limitations in the asynchronous mode.
Table 6-27. eQEP Switching Characteristics
PARAMETER
TEST CONDITIONS
MIN
MAX
4tc(SCO)
6tc(SCO)
UNIT
cycles
cycles
td(CNTR)xin
Delay time, external clock to counter increment
td(PCS-OUT)QEP
Delay time, QEP input edge to position compare sync
output
Copyright © 2007–2012, Texas Instruments Incorporated
Electrical Specifications
141
Submit Documentation Feedback
Product Folder Link(s): TMS320F28335 TMS320F28334 TMS320F28332 TMS320F28235 TMS320F28234
TMS320F28232
TI [ TEXAS INSTRUMENTS ]
