STM32H725/735 max. OCTOSPI clock with Power Scale different from VOS0

[MHoll.2]

Hi,

The datasheet DS13311 rev. 5 defines the max. SPI clock for the OCTOSPI only for VOS0, what is the max. SPI clock for other Power Scale settings (I'm planing to use VOS1)?

best regards

martin

[LCE]

Just found this in my source code, reference to RM0468, page 336,

and I'm using a HyperRam at 100 MHz on H733:

/* notes:
 *	Power:
 *		- voltage scaling for core:
 *			VOS0 ~1.36 V - "boosted performance" - highest freq -> highest power
 *			VOS1 ~1.21 V - "high performance"
 *			VOS2 ~1.10 V - "medium performance"
 *		-> in these voltage ranges SAI, I2S, OctoSPI can work with at least up to
 *			113 MHz (RM0468, pg 336)
 */
void SystemClock_Config(void)
{
	RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
	RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };

/* supply configuration update enable */
/* no SMPS on H733 */
	HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);

	/* configure the main internal regulator output voltage */
	__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

	while( 0 == __HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY) );
...