TMS320F28377D: 配置ePWM模块的死区,寄存器DBCTL.bit.IN_MODE似乎不起作用

Part Number: TMS320F28377D

配置一路PWM的A/B同时输出相同波形,在死区配置中将PWMA旁路,只赋予PWMB死区,但无论怎么配置IN_MODE寄存器(0/1/2/3),查看示波器,PWMB总是输出一个下降沿延迟,请问是哪里配置有问题

使用仿真器查看DBCTL寄存器的IN_MODE ,配置也没问题

EPwm3Regs.AQCTLA.bit.CAU = AQ_SET; 
EPwm3Regs.AQCTLA.bit.CAD = AQ_CLEAR; 
EPwm3Regs.AQCTLB.bit.CAU = AQ_SET; 
EPwm3Regs.AQCTLB.bit.CAD = AQ_CLEAR; 

//死区
EPwm3Regs.DBCTL.bit.IN_MODE = 0x01; 
EPwm3Regs.DBCTL.bit.OUT_MODE = 0x01;//旁路pwmA
EPwm3Regs.DBCTL.bit.POLSEL = DB_ACTV_HI;


EPwm3Regs.DBCTL.bit.OUTSWAP = 0x00; 

EPwm3Regs.DBRED.bit.DBRED = 200; 
EPwm3Regs.DBFED.bit.DBFED = 200; 

//
// Interrupt where we will change the Compare Values
//
EPwm3Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; // Select INT on Zero event
EPwm3Regs.ETSEL.bit.INTEN = 0; // Enable INT
EPwm3Regs.ETPS.bit.INTPRD = ET_DISABLE;