SM320F28335PTPMEP Datasheet, PDF (120/167 Pages) Texas Instruments – Digital Signal Controller (DSC)

SM320F28335-EP
SPRS581D – JUNE 2009 – REVISED MAY 2012
6.10 Enhanced Control Peripherals
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6.10.1 Enhanced Pulse Width Modulator (ePWM) Timing
PWM refers to PWM outputs on ePWM1-6. Table 6-19 shows the PWM timing requirements and Table 6-
20, switching characteristics.
Table 6-19. ePWM Timing Requirements⁽¹⁾
TEST CONDITIONS
t_w(SYCIN)
Sync input pulse width
Asynchronous
Synchronous
With input qualifier
(1) For an explanation of the input qualifier parameters, see Table 6-12.
MIN
2t_c(SCO)
2t_c(SCO)
1t_c(SCO) + t_w(IQSW)
MAX
UNIT
cycles
cycles
cycles
t_w(PWM)
t_w(SYNCOUT)
t_d(PWM)tza
t_d(TZ-PWM)HZ
Table 6-20. ePWM Switching Characteristics
PARAMETER
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
MIN
20
8t_c(SCO)
MAX
25
UNIT
ns
cycles
ns
20
ns
6.10.2 Trip-Zone Input Timing
XCLKOUT^(A)
t_w(TZ)
TZ
t_d(TZ-PWM)HZ
PWM^(B)
A. TZ - TZ1, TZ2, TZ3, TZ4, TZ5, TZ6
B. PWM refers to all the PWM pins in the device. The state of the PWM pins after TZ is taken high depends on the PWM
recovery software.
Figure 6-16. PWM Hi-Z Characteristics
Table 6-21. Trip-Zone input Timing Requirements⁽¹⁾
t_w(TZ)
Pulse duration, TZx input low
Asynchronous
Synchronous
With input qualifier
(1) For an explanation of the input qualifier parameters, see Table 6-12.
MIN
1t_c(SCO)
2t_c(SCO)
1t_c(SCO) + t_w(IQSW)
MAX
UNIT
cycles
cycles
cycles
120 Electrical Specifications
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