USB using the framework developed AT89C5131A good use, a change of crystal can be used

c5131-usb-generic-1_2_0
.......................\Atmel
.......................\.....\c5131-usb-generic-1_2_0
.......................\.....\.......................\c5131_usb_generic.Opt
.......................\.....\.......................\c5131_usb_generic.Uv2
.......................\.....\.......................\c5131_usb_generic_Uv2.Bak
.......................\.....\.......................\c5131_usb_hid_generic.hex
.......................\.....\.......................\c5131_usb_hid_generic.plg
.......................\.....\.......................\conf
.......................\.....\.......................\....\board.h
.......................\.....\.......................\....\conf_scheduler.h
.......................\.....\.......................\....\conf_usb.h
.......................\.....\.......................\config.h
.......................\.....\.......................\doc
.......................\.....\.......................\...\5131__drv_8h-source.html
.......................\.....\.......................\...\5131__drv_8h.html
.......................\.....\.......................\...\annotated.html
.......................\.....\.......................\...\board_8h-source.html
.......................\.....\.......................\...\board_8h.html
.......................\.....\.......................\...\bug.html
.......................\.....\.......................\...\c51__drv_8h-source.html
.......................\.....\.......................\...\c51__drv_8h.html
.......................\.....\.......................\...\classes.html
.......................\.....\.......................\...\compiler_8h-source.html
.......................\.....\.......................\...\compiler_8h.html
.......................\.....\.......................\...\config_8h-source.html
.......................\.....\.......................\...\config_8h.html
.......................\.....\.......................\...\conf__scheduler_8h-source.html
.......................\.....\.......................\...\conf__scheduler_8h.html
.......................\.....\.......................\...\conf__usb_8h-source.html
.......................\.....\.......................\...\conf__usb_8h.html
.......................\.....\.......................\...\debug_8c-source.html
.......................\.....\.......................\...\debug_8c.html
.......................\.....\.......................\...\debug_8h-source.html
.......................\.....\.......................\...\debug_8h.html
.......................\.....\.......................\...\doxyfile__24867_8txt.html
.......................\.....\.......................\...\doxygen.css

.......................\.....\.......................\...\ext__5131_8h-source.html
.......................\.....\.......................\...\ext__5131_8h.html
.......................\.....\.......................\...\files.html
.......................\.....\.......................\...\ftv2blank.png
.......................\.....\.......................\...\ftv2doc.png
.......................\.....\.......................\...\ftv2folderclosed.png
.......................\.....\.......................\...\ftv2folderopen.png
.......................\.....\.......................\...\ftv2lastnode.png
.......................\.....\.......................\...\ftv2link.png
.......................\.....\.......................\...\ftv2mlastnode.png
.......................\.....\.......................\...\ftv2mnode.png
.......................\.....\.......................\...\ftv2node.png
.......................\.....\.......................\...\ftv2plastnode.png
.......................\.....\.......................\...\ftv2pnode.png
.......................\.....\.......................\...\ftv2vertline.png
.......................\.....\.......................\...\functions.html
.......................\.....\.......................\...\functions_vars.html
.......................\.....\.......................\...\globals.html
.......................\.....\.......................\...\globals_defs.html
................

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