TMS320F2809, TMS320F2808, TMS320F2806

TMS320F2802, TMS320F2801, TMS320C2802

TMS320C2801, TMS320F28016, TMS320F28015

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SPRS230L –OCTOBER 2003 –REVISED DECEMBER 2009

6.10 Enhanced Control Peripherals

6.10.1 Enhanced Pulse Width Modulator (ePWM) Timing

PWM refers to PWM outputs on ePWM1-6. Table 6-22shows the PWM timing requirements and Table 6-23, switching characteristics.

Table 6-22. ePWM Timing Requirements(1)

 

 

TEST CONDITIONS

MIN

MAX

UNIT

 

 

 

 

 

 

tw(SYCIN)

Sync input pulse width

Asynchronous

2tc(SCO)

 

cycles

 

 

Synchronous

2tc(SCO)

 

cycles

 

 

With input qualifier

1tc(SCO) + tw(IQSW)

 

cycles

(1)For an explanation of the input qualifier parameters, see Table 6-15 .

Table 6-23. ePWM Switching Characteristics

 

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

 

 

 

 

 

 

tw(PWM)

Pulse duration, PWMx output high/low

 

20

 

ns

tw(SYNCOUT)

Sync output pulse width

 

8tc(SCO)

 

cycles

td(PWM)tza

Delay time, trip input active to PWM forced high

no pin load

 

25

ns

 

Delay time, trip input active to PWM forced low

 

 

 

 

td(TZ-PWM)HZ

Delay time, trip input active to PWM Hi-Z

 

 

20

ns

6.10.2 Trip-Zone Input Timing

XCLKOUT(A)

tw(TZ)

TZ

td(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 6-17. PWM Hi-Z Characteristics

Table 6-24. Trip-Zone input Timing Requirements(1)

 

 

 

 

 

MIN

MAX

UNIT

 

 

 

 

 

 

 

 

tw(TZ)

Pulse duration,

TZx

input low

Asynchronous

1tc(SCO)

 

cycles

 

 

 

 

Synchronous

2tc(SCO)

 

cycles

 

 

 

 

With input qualifier

1tc(SCO) + tw(IQSW)

 

cycles

(1)For an explanation of the input qualifier parameters, see Table 6-15 .

Copyright © 2003–2009, Texas Instruments Incorporated

Electrical Specifications

115

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Texas Instruments TMS320F28015, TMS320F2809 Enhanced Control Peripherals, Enhanced Pulse Width Modulator ePWM Timing