portable Directory Reference

Directories
directory	analog
directory	bridgetek
directory	chipidea
directory	dialog
directory	ehci
directory	espressif
directory	mentor
directory	microchip
directory	mindmotion
directory	nordic
directory	nuvoton
directory	nxp
directory	ohci
directory	raspberrypi
directory	renesas
directory	sony
directory	st
directory	sunxi
directory	synopsys
directory	template
directory	ti
directory	valentyusb
directory	wch