
Test SGPIO GPIO mode, with LPC4330@204MHz (JellyBean+Lemondrop) and code executed in RAM.

Test1:
------
while(1)
{
	for (uint_fast8_t i = 0; i < 8; i++) 
	{
		SGPIO_GPIO_OUTREG ^= (1L << i);

	}
}
Oscilloscope result (on SGPIO0): Frequency 750KHz => 272 cycles

Test2:
------
while(1)
{
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	SGPIO_GPIO_OUTREG ^= 0x5555;
}
Oscilloscope result (on SGPIO0): 3.923 MHz => 52 cycles

Test3:
------
while(1)
{
	SGPIO_GPIO_OUTREG ^= 0x5555;
}
Oscilloscope result (on SGPIO0): Frequency 7.28MHz => 28 cycles

Test4:
------
while(1)
{
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	SGPIO_GPIO_OUTREG = 0x5555;
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	__asm__(" nop");
	SGPIO_GPIO_OUTREG = 0xAAAA;
}
Oscilloscope result (on SGPIO0): Frequency 17MHz => 12 cycles

Test5:
------
while(1)
{
	SGPIO_GPIO_OUTREG = 0x5555;
	SGPIO_GPIO_OUTREG = 0xAAAA;
}
Oscilloscope result (on SGPIO0): Frequency 25.5MHz => 8 cycles
