Unable to get USB working properly on STM32F469IIT

Hello

I have a working example of USB CDC for STM32F429 (based on Keil example)
We have changed the CPU to STM32F469IIT and the usage of USB from HS to FS mode.
I have been able to successfully run STMCube example of the CDC on hte device in FS mode.
Yet when I have changed the Keil based example from STM32F429 to teh STM32F469, and work without VBUS in FS mode I am not able to even correctly initialize USB (I am not getting USBRST interrupt that should arrive at the initialization).
The drivers version is 6.8.0 (MDK)
I have change clocks initialization as defined in Cube:

/* System Clock Configuration */
void SystemClock_Config(void) {
#if 0 RCC_OscInitTypeDef RCC_OscInitStruct; RCC_ClkInitTypeDef RCC_ClkInitStruct;

/* Enable Power Control clock */ __PWR_CLK_ENABLE();

/* The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency (see datasheet). */ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

/* Enable HSE Oscillator and activate PLL with HSE as source */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 8; RCC_OscInitStruct.PLL.PLLN = 336; RCC_OscInitStruct.PLL.PLLP = 2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 7; HAL_RCC_OscConfig(&RCC_OscInitStruct);

/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
#endif RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;

/* Enable Power Control clock */ __HAL_RCC_PWR_CLK_ENABLE();

/* The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency, to update the voltage scaling value regarding system frequency refer to product datasheet. */ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

/* Enable HSE Oscillator and activate PLL with HSE as source */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 8; RCC_OscInitStruct.PLL.PLLN = 360; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 2; HAL_RCC_OscConfig(&RCC_OscInitStruct);

/* Activate the OverDrive to reach the 180 MHz Frequency */ HAL_PWREx_EnableOverDrive();

/* Select PLLSAI output as USB clock source */ PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_CK48; PeriphClkInitStruct.Clk48ClockSelection = RCC_CK48CLKSOURCE_PLLSAIP; PeriphClkInitStruct.PLLSAI.PLLSAIN = 384; PeriphClkInitStruct.PLLSAI.PLLSAIQ = 7; PeriphClkInitStruct.PLLSAI.PLLSAIP = RCC_PLLSAIP_DIV8; HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);

/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
}

And it is still not working (i.e. USBRST and USB suspend interrupts at init are not coming)
Do you have any idea what a problem can be?
We are working without VBNUS and without overcurrent detection

Otherwise can i use Keil environment using existing SPI,I2C drivers from Keil while USB from STM Cube and the protocol stack of USB from Cube?

Thanks