Time-Base Counter Synchronization of 28335 PWM modules (28335 PWM计数同步问题)

user5841688

Is the EPWM4SYNCI connected to EPWM1SYNCO or EPWM3SYNCO?

In Figure 3-7 (page 232 of TMS320x2833x Technical Reference Manual ), it seems that EPWM4SYNCI is connected to EPWM1SYNCO.

But in Figure 3-53 (page 285 of TMS320x2833xTechnical Reference Manual ), it seems that EPWM4SYNCI is connected to EPWM3SYNCO.

These two explanations are very confusing. Is there any specific explanation about EPWMxSYNCI and EPWMxSYNCO?

EPWM4SYNCI 端口是连接 EPWM1SYNCO 还是 EPWM3SYNCO？

TMS320x2833x Technical Reference Manual 的232页，图3-7可以看出，EPWM4SYNCI 端口是连接 EPWM1SYNCO的，

但是TMS320x2833x Technical Reference Manual 的285页，图3-53可以看出，EPWM4SYNCI 端口是连接 EPWM3SYNCO的.

这两处表述令人很困惑，请问各个模块的SYNCI和SYNCO到底是什么链接和配置方式？

5 年多前

0 Green Deng 5 年多前

TI__Guru** 101655 points

你好，ePWM的同步信号仅来自前一个ePWM模块的 EPWMxSYNCO：
EPWMxSYNCI Time-base synchronization input.
Input pulse used to synchronize the time-base counter with the counter of ePWM module earlier in the
synchronization chain. An ePWM peripheral can be configured to use or ignore this signal. For the first ePWM
module (EPWM1) this signal comes from a device pin. For subsequent ePWM modules this signal is passed
from another ePWM peripheral. For example, EPWM2SYNCI is generated by the ePWM1 peripheral,
EPWM3SYNCI is generated by ePWM2 and so forth. See Section 3.2.2.3.3 for information on the
synchronization order of a particular device.
另外，这里有个帖子讲的很清楚，你可以看一下：
e2echina.ti.com/.../162416