关于MPC5606的PWM问题求助！！！

只看该作者 · 2015-7-26 21:38

void initEMIOS_0ch22(void) {       /* EMIOS 0 CH 22: Output Pulse Width Modulation */
  EMIOS_0.CH[22].CADR.R = 500;    /* Leading edge when channel counter bus=500*/
  EMIOS_0.CH[22].CBDR.R = 999;    /* Trailing edge when channel's counter bus=999*/
  EMIOS_0.CH[22].CCR.B.BSL = 0x0; /* Use counter bus A (default) */
  EMIOS_0.CH[22].CCR.B.EDPOL = 1; /* Polarity-leading edge sets output/trailing clears*/
  EMIOS_0.CH[22].CCR.B.MODE = 0x60; /* Mode is OPWM Buffered */
  SIU.PCR[70].R = 0x0600;          /* MPC56xxS: Assign EMIOS_0 ch 22 to pad */
}
给位高手看看，上面说的是什么含义啊，万分感谢！！！