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# 2.8.3.1 USB_DEVICE_MSD_INSTANCES_NUMBER Macro

## C

    #define USB_DEVICE_MSD_INSTANCES_NUMBER 1

## Summary

MSD Function Driver Instances Number

This configuration constant defines the number of MSD Function Driver instances in the USB Device. This value should be atleast 1 if the MSD function is required. In case where multiple MSD function drivers are required, it should be noted the MSD function driver supports multiple LUNs. This allows one MSD function driver instance to manage multiple media. Using multiple LUNs can be considered as an alternative to using multiple MSD function driver instances.

## Remarks

None.