ULPI (UTMI+ Low Pin Interface)

ULPI (UTMI+ Low Pin Interface) is the low-pin version of UTMI. UTMI (USB 2.0 Transceiver Macrocell Interface) connects a USB controller and USB PHY; compared with ULPI, UTMI has more control signals and supports 8-bit/16-bit data interfaces.

Choosing the wrong Decode mode (ULPI/USB) misinterprets traffic. For channel-prefix differences, see Settings.

Decode Settings

ULPI Decode Settings

• Channel: Assign ULPI channels; Quick Setting can set Data pins quickly. Quick Setting Default is checked (enabled).
• Decode: ULPI or USB (analog timing). Default is ULPI.

Result

ULPI:

ULPI decode result

USB:

ULPI USB (analog timing) decode result