S12ZVL LVI interrupt and voltage levels to triggers interrupt

[charudattaingal]

Hello Team,

Please share the example code for s12zVL LVI enable code.

I have gone through data sheet, I have not seen LVI triggered voltage level are configurable.

Let me know is there any way to configure LVI triggers voltage level apart from below mentioned Values ? 

Thanks You !

Best Regards,

Charudatta

[danielmartynek]

Hello,

The LVI level is not configurable.

But the MCU has BATS module that can monitor VSUP voltage and trigger Low or High voltage warning interrupts.

Please refer to Appendix F BATS Electrical Specification, S12ZVL RM rev.2.47.

BR, Daniel

[charudattaingal]

Hello Daniel,

Thank you for quick response.

Please share the LVI example code.

Thanks & Regards,

Charudatta

[danielmartynek]

Hello Charudatta,

I'm sorry for the delay.

You can refer to the code below, tested on S12ZVLA12.

BR, Daniel

interrupt VectorNumber_Vlvi void LVI_ISR(void)
{
 
  // Interrupt indicated by flag LVIF = 1 
  // is triggered by any change of the status bit LVDS if interrupt enable bit LVIE = 1
  if(CPMULVCTL_LVDS)
  {  // [3] LVDS = 1 Input voltage VDDA is below level VLVIA and FPM.
     asm BGND; // Breakpoint, do something here
  }
  else
  {  // [3] LVDS = 0 Input voltage VDDA is above level VLVID or RPM (Stop mode).
     asm BGND; // Breakpoint, do something here
  } 
 
  CPMULVCTL_LVIF = 1; // Clear LVIF

}

void delay(volatile int i)
{
  while(i--);
}

void main(void) 
{
  EnableInterrupts;
  /* include your code here */
 
  CPMUVREGCTL = 0x81; 
  // [8] VREG5VEN = 1b Voltage regulator 5 Volt operation enabled
  // [1] EXTXON = 0b External ballast transistor disabled
  // [0] INTXON = 1b Internal ballast transistor enabled
 
  delay(1000); // VDDA is rising to 5V
 
  CPMULVCTL |= 0x01; // Clear LVIF 
  CPMULVCTL |= 0x02; // Enable LVI
 
  for(;;) 
  {
     __RESET_WATCHDOG(); /* feeds the dog */
 
  } /* loop forever */
    /* please make sure that you never leave main */
}
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