Texas Instruments TMS320F2802 - Manual (Page 115)

PWM (B)
TZ
XCLKOUT (A)
t
w(TZ)
t
d(TZ-PWM)HZ
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801, TMS320C2802
TMS320C2801, TMS320F28016, TMS320F28015
www.ti.com SPRS230N – OCTOBER 2003 – REVISED MAY 2012
6.10 Enhanced Control Peripherals
6.10.1 Enhanced Pulse Width Modulator (ePWM) Timing
PWM refers to PWM outputs on ePWM1–6. Table 6-22 shows the PWM timing requirements and Table 6-
23 , switching characteristics.
Table 6-22. ePWM Timing Requirements (1)
TEST CONDITIONS MIN MAX UNIT
t
w(SYCIN)
Sync input pulse width Asynchronous 2t
c(SCO)
cycles
Synchronous 2t
c(SCO)
cycles
With input qualifier 1t
c(SCO)
+ t
w(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
t
w(PWM)
Pulse duration, PWMx output high/low 20 ns
t
w(SYNCOUT)
Sync output pulse width 8t
c(SCO)
cycles
t
d(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
t
d(TZ-PWM)HZ
Delay time, trip input active to PWM Hi-Z 20 ns
6.10.2 Trip-Zone Input Timing
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
t
w(TZ)
Pulse duration, TZx input low Asynchronous 1t
c(SCO)
cycles
Synchronous 2t
c(SCO)
cycles
With input qualifier 1t
c(SCO)
+ t
w(IQSW)
cycles
(1) For an explanation of the input qualifier parameters, see Table 6-15 .
Copyright © 2003–2012, Texas Instruments Incorporated Electrical Specifications 115
Submit Documentation Feedback
Product Folder Link(s): TMS320F2809 TMS320F2808 TMS320F2806 TMS320F2802 TMS320F2801 TMS320C2802
TMS320C2801 TMS320F28016 TMS320F28015