I using the HSUSB on a K61 MCU in device mode.
I'm using firmware based on the old Freescale USB 4.1.1 stack.
I have setup a bulk transfer of 1MByte using several transfer descriptors chained in a list.
The transfer completes correctly.
But I notice a 40 microsecond delay between transfer descriptors. (seen on USB analyzer)
Is this normal? I expected the USB engine to work much faster than that.
Anyone have any experience with this? Is this behavior documented?