analogWrite inside an interrupt

Official Hardware Portenta Family Portenta H7
11

as replied in my opened ticket 25 is not an allowed pin for analogWrite.

Si my problem remain, why doesn't it work in an interrupt?

#include <Portenta_H7_TimerInterrupt.h>

#define LEDB_PIN            3

volatile char val_ledb;

Portenta_H7_Timer ITimer0(TIM1);

void TimerHandler0() {
  static bool state = 0;

  if(state == true) {
    analogWrite(LEDB_PIN, val_ledb);
  } else {
    analogWrite(LEDB_PIN, 0);
  }
  state = !state;
}

void setup() {
  pinMode(LEDB_PIN, OUTPUT);

  val_ledb = 153;

  ITimer0.attachInterruptInterval(1000UL * 1000UL, TimerHandler0);
}

void loop() {
}