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LPC54608  usb_device_msc_sdcard_lite  in the  usb_examples  has some questions

Question asked by zhixiang zeng on Aug 6, 2017
Latest reply on Aug 8, 2017 by soledad
Hi,friends。when I running the usb examples --usb_device_msc_sdcard_lite.In the  "usb_device_config.h" , there  are some configuration definitions of  USB  device config are not very clear.
1. what does the " LPCIP3511  "mean?
#define USB_DEVICE_CONFIG_KHCI (0U)
#define USB_DEVICE_CONFIG_EHCI (0U)
#define USB_DEVICE_CONFIG_LPCIP3511FS (1U)
#define USB_DEVICE_CONFIG_LPCIP3511HS (0U)

 

2.in the usb_device_msc_sdcard_lite  demo  ,about the  sd clk config is 
CLOCK_SetClkDiv(kCLOCK_DivSdioClk, 2U, true);
BOARD_BootClockFROHF96M();
but in the sd_fatfs demo  about the sd clk config  is
CLOCK_SetClkDiv(kCLOCK_DivSdioClk, 1U, true);
BOARD_BootClockFROHF48M();
I think this is all about SD card reading and writing, why is the clock configuration different?

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