TMS320F28069 Datasheet, PDF (135/159 Pages) Texas Instruments – Piccolo Microcontrollers

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TMS320F28069, TMS320F28068, TMS320F28067, TMS320F28066
TMS320F28065, TMS320F28064, TMS320F28063, TMS320F28062
SPRS698A – NOVEMBER 2010 – REVISED JANUARY 2011
6.21.1 Enhanced Quadrature Encoder (eQEP) Electrical Data/Timing
Table 6-60 shows the eQEP timing requirement and Table 6-61 shows the eQEP switching
characteristics.
Table 6-60. Enhanced Quadrature Encoder Pulse (eQEP) Timing Requirements⁽¹⁾
TEST CONDITIONS
t_w(QEPP)
QEP input period
Asynchronous/synchronous
With input qualifier
t_w(INDEXH)
QEP Index Input High time
Asynchronous/synchronous
With input qualifier
t_w(INDEXL)
QEP Index Input Low time
Asynchronous/synchronous
With input qualifier
t_w(STROBH)
QEP Strobe High time
Asynchronous/synchronous
With input qualifier
t_w(STROBL)
QEP Strobe Input Low time
Asynchronous/synchronous
With input qualifier
(1) For an explanation of the input qualifier parameters, see Table 6-67.
MIN
2t_c(SCO)
2[1t_c(SCO) + t_w(IQSW)]
2t_c(SCO)
2t_c(SCO) +t_w(IQSW)
2t_c(SCO)
2t_c(SCO) + t_w(IQSW)
2t_c(SCO)
2t_c(SCO) + t_w(IQSW)
2t_c(SCO)
2t_c(SCO) +t_w(IQSW)
MAX
UNIT
cycles
cycles
cycles
cycles
cycles
cycles
cycles
cycles
cycles
cycles
t_d(CNTR)xin
t_{d(PCS-OUT)QEP}
Table 6-61. eQEP Switching Characteristics
PARAMETER
TEST CONDITIONS
MIN
Delay time, external clock to counter increment
Delay time, QEP input edge to position compare sync
output
MAX
4t_c(SCO)
6t_c(SCO)
UNIT
cycles
cycles
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Peripheral and Electrical Specifications 135
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