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| AM1808_1004 Datasheet, PDF (237/264 Pages) Texas Instruments – AM1808 ARM Microprocessor | |||
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AM1808
www.ti.com
SPRS653A â FEBRUARY 2010 â REVISED APRIL 2010
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.
tw(SYNCIN)
Table 6-126. Timing Requirements for eHRPWM
PARAMETER
Sync input pulse width
TEST CONDITIONS
Asynchronous
Synchronous
1.3V, 1.2V, 1.1V, 1.0V
MIN
MAX
2tc(SCO)
2tc(SCO)
UNIT
cycles
cycles
Table 6-127. Switching Characteristics Over Recommended Operating Conditions for eHRPWM
PARAMETER
tw(PWM)
tw(SYNCOUT)
td(PWM)TZA
td(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
8tc(SCO)
25
1.1V
MIN MAX
20
8tc(SCO)
25
1.0V
MIN MAX
26.6
8tc(SCO)
25
UNIT
ns
cycles
ns
ns
20
20
20
Copyright © 2010, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications 237
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