28035的ADC采样问题？

// Assumes ePWM1 clock is already enabled in InitSysCtrl();
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 4; // Select SOC from from CPMA on upcount
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event
EPwm1Regs.CMPA.half.CMPA = 0x0080; // Set compare A value
EPwm1Regs.TBPRD = 0xFFFF; // Set period for ePWM1
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // count up and start

以上代码为ADC采样例程，请问多长时间产生一次中断， EPwm1Regs.CMPA.half.CMPA = 0x0080;，是不是第一产生中断的时间为 8*16/60M。之后是不是每次为65536/60M。请问这样理解对不对？