TMS320C6748_16 Datasheet, PDF (245/273 Pages) Texas Instruments – Fixed- and Floating-Point DSP

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TMS320C6748
SPRS590F – JUNE 2009 – REVISED MARCH 2014
6.29.1 Enhanced Pulse Width Modulator (eHRPWM) Timing
PWM refers to PWM outputs on eHRPWM1-6. Table 6-126 shows the PWM timing requirements and
Table 6-127, switching characteristics.
t_w(SYNCIN)
Table 6-126. Timing Requirements for eHRPWM
Sync input pulse width
TEST CONDITIONS
Asynchronous
Synchronous
1.3V, 1.2V, 1.1V, 1.0V
MIN
MAX
2t_c(SCO)
2t_c(SCO)
UNIT
cycles
cycles
Table 6-127. Switching Characteristics Over Recommended Operating Conditions for eHRPWM
PARAMETER
t_w(PWM)
t_w(SYNCOUT)
t_d(PWM)TZA
t_d(TZ-PWM)HZ
Pulse duration, PWMx output
high/low
Sync output pulse width
Delay time, trip input active to
PWM forced high
Delay time, trip input active to
PWM forced low
Delay time, trip input active to
PWM Hi-Z
TEST
CONDITIONS
no pin load; no
additional
programmable
delay
no additional
programmable
delay
1.3V, 1.2V
MIN MAX
20
8t_c(SCO)
25
1.1V
MIN MAX
20
8t_c(SCO)
25
1.0V
MIN MAX
26.6
8t_c(SCO)
25
UNIT
ns
cycles
ns
ns
20
20
20
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Peripheral Information and Electrical Specifications 245
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