When looking at dmesg for USB devices, what's the difference between "New USB device found" and "New USB device strings"?

I am trying to connect a MicroSemi FlashPro 4 to my Linux system. When I plug it in, dmesg shows: [13728.408610] usb 11-1: New USB device found, idVendor=1514, idProduct=2006, bcdDevice= 0.00 [13728.408617] usb 11-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 The device/programmer doesn't turn on. But lsusb adds this when it's plugged in: Bus 011 Device 016: ID 1514:2006 Actel I looked up the idVendor and idProduct and they match MicroSemi (formerly known as Actel) and my device. However I don't understand why the second line of dmesg gives values of 0 for fields that it apparently just read the line before. What actually is going on behind the scenes between the two output lines? And do values of 0 mean it didn't find a driver?