TMS320F280049C: 有关参考手册中ECAP部分中的DELAY_CLK

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https://www.ti.com.cn/cn/lit/ug/sprui33h/sprui33h.pdf

TRM第2158页，这部分说明同步时出现的延迟可以外部时钟给。

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for eCAP can be either software sync-in or external sync-in. The external sync-in signal can come from EPWM, eCAP, or X-Bar. The SWSYNC of the eCAP module is logical ORed with the SYNC signal as shown in Figure 19-7. The SYNC signal is defined by the selection of SYNCSELECT[ECAPxSYNCIN] as shown in Figure 19-8. Note If SWSYNC is forced from ECAPx, then the Sync pulse is delayed by one clock cycle for sync pulse receiving ECAPs . This cycle delay/lag for the sync pulse receiving ECAPs can be corrected with the CTRPHS register. If there is an external SYNC signal, then all ECAPs see the signal at the same time.

请您参考这个官方TRM原文对于这个外部信号的说明。