Hi Andy,
Sorry for the later reply.
I do a test with [lpcxpresso54608_usb_examples_host_msd_fatfs_bm] project with [SDK_2.3.0_LPCXpresso54608] software package.
It need to make a modification at <usb_host_config.h> file:
#define USB_HOST_CONFIG_OHCI (0U)
#define USB_HOST_CONFIG_IP3516HS (1U)
The LPCXpresso54608 board with below jumper setting:

After that, I could get this demo run at USB1 HS port:

Wish it helps.
Have a great day,
Mike
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