Specifications

Section 43. High-Speed PWM

High-Speed PWM

43.10.10 PWM Fault and Current-Limit Trigger Outputs to ADC

The CLSRC<4:0> bits (FCLCONx<14:10>) and FLTSRC<4:0> bits (FCLCONx<7:3>) and

control the fault selection to each PWM generator module. The control multiplexers select the

desired fault and current-limit signals for their respective modules. The selected fault and

current-limit signals which are also available to the ADC module as trigger signals, initiate ADC

sampling and conversion operations. The configuration of PWM fault, current-limit and

leading-edge blanking is shown in Example 43-23.

Example 43-23: PWM Fault, Current-Limit and Leading-Edge Blanking Configuration

/* PWM Fault, Current-Limit, and Leading-Edge Blanking Configuration */

FCLCON1bits.IFLTMOD = 0; /* CLDAT bits and FLTDAT bits control PWMxH/PWMxL pins on occurrence of

current limit and fault inputs respectively */

//FCLCON1bits.CLSRC = 0; /* Fault 1 is selected as source for the Current Limit Control signal */

//FCLCON1bits.FLTSRC = 3; /* Fault 4 is selected as source for the Fault Control Signal source */

//FCLCON1bits.CLPOL = 1; /* Current-limit source is active-low */

//FCLCON1bits.FLTPOL = 1; /* Fault Input source is active-low */

//FCLCON1bits.CLMOD = 1; /* Enable current-limit function */

//FCLCON1bits.FLTMOD = 1; /* Enable Cycle-by-Cycle Fault mode */

FCLCON1 = 0x031D;

IOCON1bits.FLTDAT = 0; /* PWMxH and PWMxL are driven inactive on occurrence of fault */

IOCON1bits.CLDAT = 0; /* PWMxH and PWMxL are driven inactive on occurrence of current-limit */

//LEBCON1bits.PHR = 1; /* Rising edge of PWMxH will trigger LEB counter */

//LEBCON1bits.PHF = 0; /* Falling edge of PWMxH is ignored by LEB counter */

//LEBCON1bits.PLR = 1; /* Rising edge of PWMxL will trigger LEB counter */

//LEBCON1bits.PLF = 0; /* Falling edge of PWMxL is ignored by LEB counter */

//LEBCON1bits.FLTLEBEN = 1; /* Enable fault LEB for selected source */

//LEBCON1bits.CLLEBEN = 1; /* Enable current-limit LEB for selected source */

//LEBCON1bits.LEB = 8; /* Blanking period of 8.32 ns */

LEBCON1 = 0xAC40;

PWMCON1bits.XPRES = 0; /* External pins do not affect PWM time base reset */

PWMCON1bits.FLTIEN = 1; /* Enable fault interrupt */

PWMCON1bits.CLIEN = 1; /* Enable current-limit interrupt */

Note: The code in Example 43-23 applies to devices with remappable I/O only.