service cable vs. DCU-60

[circlenses]

It seems really strange that they use the very same pins for the USB cable and the serial cable for data transfer, except the signal for the USB is 5V and serial is converted to 3.3V. But then again they also made it that you cant charge the bluwtooth with the USB cable but you can charge the phone with it even though its both 5V from the USB bus or charger 5V.

Or this is what I understand from looking at the cruiser cable diagrams.

ops correction... They also use the 3.3V VPPFLASH line which must be able to write to the boot area of the eeprom which the USB cable can not do. Some cables seem to use 5V while others use 3V for the VPPFlash line.