Merge pull request #140 from FrankBoesing/patch-1

Fix for crash @ 48 & 24MHz on K66

teensy3/mk20dx128.c

 #elif F_CPU == 48000000
 	// config divisors: 48 MHz core, 48 MHz bus, 24 MHz flash, USB = 96 / 2
   #if defined(KINETISK)
-	SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(1) | SIM_CLKDIV1_OUTDIV2(1) | SIM_CLKDIV1_OUTDIV4(3);
+	SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(1) | SIM_CLKDIV1_OUTDIV2(1) | SIM_CLKDIV1_OUTDIV3(1) |  SIM_CLKDIV1_OUTDIV4(3);
 	SIM_CLKDIV2 = SIM_CLKDIV2_USBDIV(1);
   #elif defined(KINETISL)
 	SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(1) | SIM_CLKDIV1_OUTDIV4(1);
 #elif F_CPU == 24000000
 	// config divisors: 24 MHz core, 24 MHz bus, 24 MHz flash, USB = 96 / 2
 	#if defined(KINETISK)
-	SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(3) | SIM_CLKDIV1_OUTDIV2(3) | SIM_CLKDIV1_OUTDIV4(3);
+	SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(3) | SIM_CLKDIV1_OUTDIV2(3) | SIM_CLKDIV1_OUTDIV3(3) | SIM_CLKDIV1_OUTDIV4(3);
 	SIM_CLKDIV2 = SIM_CLKDIV2_USBDIV(1);
 	#elif defined(KINETISL)
 	SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(3) | SIM_CLKDIV1_OUTDIV4(0);