EVB-USB7056
EVALUATION BOARD
USER’S GUIDE
2019 Microchip Technology Inc.
DS50002887A-page 9
Chapter 1. Overview
1.1
GENERAL INTRODUCTION TO USB7056
The USB7056 hub controller is a six-port SuperSpeed smart hub controller with USB
Power Delivery (PD) support. It is fully compliant with the USB3.1, USB2.0, and USB
PD 3.0 specifications. The six-port hub supports 5 Gbps SuperSpeed (SS USB3.1
Gen1), 480 Mbps High-Speed (HS), 12 Mbps Full-Speed (FS), and 1.5 Mbps
Low-Speed (LS) USB signaling.
The USB7056 has one USB3.1 Gen1 upstream port with PD and DisplayPort
Alternate Mode support. PD support is enabled through a companion PD controller
(UPD350), which operates as a PD PHY + MAC + GPIO expander. The PD firmware
stack executes within the USB7056 hub’s internal microcontroller (MCU). The
DisplayPort Alternate Mode support is enabled through the use of an external 6:4
cross-bar switch. The USB7056 firmware supports up to 100W of power delivery on the
upstream port.
Note:
The EVB-USB7056 baseboard supports up to 100W of power delivery by
design. However, the included power regulator is limited to 60W maximum
capability. The default hub firmware load is hence also configured by default
to offer 60W maximum to the device attached to the upstream USB Type-C
PD port. The PD power regulator (abbreviated as PM-PD) is a plug-in daugh
-
ter card, which can be exchanged to test with various DC/DC solutions. Dif
-
ferent PM-PD solutions may extend or restrict the maximum power capability
depending upon the capabilities of the individual daughter card, and the hub
firmware load should be reconfigured accordingly when exchanging PM-PD
daughter cards.
The USB7056 has one basic USB3.1 Gen1 downstream USB Type-C port (up to 15W,
no PD), three USB3.1 Gen1 downstream ports, and two USB2.0 downstream Type-A
ports. All downstream ports support battery charging. On these battery charging
enabled downstream ports, the device provides automatic USB data line handshaking.
The handshaking supports USB BC1.2 Charging Downstream Port (CDP), Dedicated
Charging Port (DCP), and legacy devices.
The USB7056 is a smart hub with an embedded MCU for enabling advanced features.
These features include hub configuration through the upstream USB interface,
USB-to-I
2
C bridging, USB-to-SPI bridging, USB-to-GPIO bridging, USB-to-I
2
S audio
bridging, and more.
