參數(shù)資料
型號(hào): TMS320F2801X
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號(hào)處理
英文描述: Digital Signal Processors
中文描述: 數(shù)字信號(hào)處理器
文件頁數(shù): 113/140頁
文件大?。?/td> 1108K
代理商: TMS320F2801X
www.ti.com
6.10 Enhanced Control Peripherals
6.10.1 Enhanced Pulse Width Modulator (ePWM) Timing
6.10.2 Trip-Zone Input Timing
PWM
(B)
TZ
XCLKOUT
(A)
t
w(TZ)
t
d(TZ-PWM)HZ
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801
TMS320C2802, TMS320C2801, and TMS320F2801x DSPs
SPRS230J–OCTOBER 2003–REVISED SEPTEMBER 2007
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
Asynchronous
Synchronous
With input qualifier
MIN
MAX
UNIT
cycles
cycles
cycles
t
w(SYCIN)
Sync input pulse width
2t
c(SCO)
2t
c(SCO)
1t
c(SCO)
+ t
w(IQSW)
(1)
For an explanation of the input qualifier parameters, see
Table 6-15
.
Table 6-23. ePWM Switching Characteristics
PARAMETER
TEST CONDITIONS
MIN
20
MAX
UNIT
ns
cycles
ns
t
w(PWM)
t
w(SYNCOUT)
t
d(PWM)tza
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
8t
c(SCO)
no pin load
25
t
d(TZ-PWM)HZ
20
ns
A.
B.
TZ - TZ1, TZ2, TZ3, TZ4, TZ5, TZ6
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 6-15. PWM Hi-Z Characteristics
Table 6-24. Trip-Zone input Timing Requirements
(1)
MIN
MAX
UNIT
cycles
cycles
cycles
t
w(TZ)
Pulse duration, TZx input low
Asynchronous
Synchronous
With input qualifier
1t
c(SCO)
2t
c(SCO)
1t
c(SCO)
+ t
w(IQSW)
(1)
For an explanation of the input qualifier parameters, see
Table 6-15
.
Table 6-25
shows the high-resolution PWM switching characteristics.
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Electrical Specifications
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