原标题：Microchip USB7216六端口USB 3．1 Gen 2 Type－C控制方案

　　microchip公司的USB7216是低功耗OEM可配置的六端口USB 3.1 Gen 2 Type-C控制器集线器,适用于嵌入USB应用. USB7216完全和USB Revision 3.1指标与USB 2.0 Link功率管理补篇兼容,支持10 Gbps超级速率+(SS+),5Gbps超级速率(SS),480Mbps高速(HS),12 Mbps全速(FS)和1.5 Mbps低速(LS) USB下行设备,具有四个USB 3.1 Gen 2下形端口和HS/FS/LS两个标准USB 2.0下行端口.片上微控制器管理I/O,VBUS和其它信号,集成了96kB RAM和256kB ROM,8kB OTP ROM和片上电荷泵以及通过OTP ROM,SPI外接存储器或SMBus配置编程.主要用在标准USB集线器, 笔记本坞站,PC主板,PC监视器坞站,多功能USB 3.1 Gen 2外设.中电网为您整理如下详细资料,本文介绍了USB7216亮点和主要优势,内部框图-上行Type-B应用以及评估板EVB-USB7216主要特性,框图,电路图,材料清单和PCB设计图.

　　The Microchip USB7216 hub is a low-power, OEM configurable, USB 3.1 Gen 2 hub controller with 6 downstream ports and advanced features for embedded USB applications. The USB7216 is fully compliant with the Universal Serial Bus Revision 3.1 Specification and USB 2.0 Link Power Management Addendum. The USB7216 supports 10 Gbps Super-Speed+ (SS+), 5 Gbps SuperSpeed (SS), 480 Mbps Hi-Speed (HS), 12 Mbps Full-Speed (FS), and 1.5 Mbps Low-Speed (LS) USB downstream devices on four standard USB 3.1 Gen 2 downstream ports and only legacy speeds (HS/FS/LS) on two standard USB 2.0 downstream ports.

　　The USB7216 is a standard USB 3.1 Gen 2 hub that supports native basic Type-C with integrated CC logic on downstream port 1. The downstream Type-C port includes an internal USB 3.1 Gen 2 multiplexer; no external multiplexer is required for Type-C support.The USB7216 supports the legacy USB speeds (HS/FS/LS) through a dedicated USB 2.0 hub controller that is the culmination of seven generations of Microchip hub feature controller design and experience with proven reliability, interoperability, and device compatibility. The SuperSpeed hub controller operates in parallel with the USB 2.0 controller, decoupling the 10/5 Gbps SS+/SS data transfers from bottlenecks due to the slower USB 2.0 traffic.

　　The USB7216 enables OEMs to configure their system using “Configuration Straps.” These straps simplify the configuration process assigning default values to USB 3.1 Gen 2 ports and GPIOs. OEMs can disable ports, enable battery charging and define GPIO functions as default assignments on power up removing the need for OTP or external SPI

　　ROM.

　　The USB7216 supports downstream battery charging. The USB7216 integrated battery charger detection circuitry supports the USB-IF Battery Charging (BC1.2) detection method and most Apple devices. The USB7216 provides the battery charging handshake and supports the following USB-IF BC1.2 charging profiles:

　　• DCP: Dedicated Charging Port (Power brick with no data)

　　• CDP: Charging Downstream Port (1.5A with data)

　　• SDP: Standard Downstream Port (0.5A[USB 2.0]/0.9A[USB 3.1] with data)

　　Additionally, the USB7216 includes many powerful and unique features such as:

　　The Hub Feature Controller, an internal USB device dedicated for use as a USB to I2C/SPI/GPIO interface that allows external circuits or devices to be monitored, controlled, or configured via the USB interface.

　　Multi-Host Endpoint Reflector, which provides unique USB functionality whereby USB data can be “mirrored” between two USB hosts (Multi-Host) in order to perform a single USB transaction.This capability is fully covered by Microchip intellectual property (U.S. Pat. Nos. 7,523,243 and 7,627,708) and is instrumental in enabling Apple CarPlay™, where the Apple iPhone® becomes a USB Host.

　　FlexConnect, which provides flexible connectivity options. One of the USB7216’s downstream ports can be reconfigured to become the upstream port, allowing master capable devices to control other devices on the hub.

　　PortSwap, which adds per-port programmability to USB differential-pair pin locations. PortSwap allows direct alignment of USB signals (D+/D-) to connectors to avoid uneven trace length or crossing of the USB differential signals on the PCB.

　　PHYBoost, which provides programmable levels of Hi-Speed USB signal drive strength in the downstream port transceivers. PHYBoost attempts to restore USB signal integrity in a compromised system environment. The graphic on the right shows an example of Hi-Speed USB eye diagrams before and after PHYBoost signal integrity restoration. in a compromised system environment.

　　VariSense, which controls the Hi-Speed USB receiver sensitivity enabling programmable levels of USB signal receive sensitivity. This capability allows operation in a sub-optimal system environment, such as when a captive USB cable is used.

　　Port Split, which allows for the USB 3.1 Gen 2 and USB 2.0 portions of downstream ports 2, 3, and 4 in Configuration 1 and downstream port 4 (only) in Configuration 2 to operate independently and enumerate two separate devices in parallel in special applications.

　　USB Power Delivery Billboard Device, which allows an internal device to enumerate as a Billboard class device when a Power Delivery Alternate Mode negotiation has failed. The Billboard device will enumerate temporarily to the host PC when a failure occurs, as indicated by a digital signal from an external Power Delivery controller.

　　The USB7216 can be configured for operation through internal default settings. Custom OEM configurations are supported through external SPI ROM or OTP ROM. All port control signal pins are under firmware control in order to allow for maximum operational flexibility and are available as GPIOs for customer specific use.

　　The USB7216 is available in commercial (0℃ to +70℃) and industrial (-40℃ to +85℃) temperature range.

　　USB7216亮点:

　　• 6-Port USB Smart Hub with:

　　- Native USB Gen 2 Type-C™ support on downstream port 1

　　- Three Standard USB 3.1 Gen 2 downstream ports

　　- Two Standard USB 2.0 downstream ports

　　- Internal Hub Feature Controller device which enables:

　　- USB to I2C/SPI/I2S/GPIO bridge endpoint support

　　- USB to internal hub register write and read

　　• USB Link Power Management (LPM) support

　　• USB-IF Battery Charger revision 1.2 support on downstream ports (DCP, CDP, SDP)

　　• Enhanced OEM configuration options available through either OTP or SPI ROM

　　• Available in 100-pin (12mm x 12mm) VQFN RoHS compliant package

　　• Commercial and industrial grade temperature Support

　　USB7216主要优势:

　　• USB 3.1 Gen 2 compliant 10 Gbps, 5 Gbps, 480 Mbps, 12 Mbps, and 1.5Mbps operation

　　- 5V tolerant USB 2.0 pins

　　- 1.21V tolerant USB 3.1 Gen 2 pins

　　- Integrated termination and pull-up/down resistors

　　• Native USB Type-C Support

　　- Type-C CC Pin with integrated Rp and Rd resistors

　　- Integrated multiplexer on USB Type-C enabled ports. USB 3.1 Gen 2 PHYs are disabled until a valid Type-C attach is detected, saving idle power.

　　- Control for external VCONN supply

　　• Supports battery charging of most popular battery powered devices on all ports

　　- USB-IF Battery Charging rev. 1.2 support (DCP, CDP, SDP)

　　- Apple® portable product charger emulation

　　- Chinese YD/T 1591-2006/2009 charger emulation

　　- European Union universal mobile charger support

　　- Supports additional portable devices

　　• On-chip Microcontroller

　　- manages I/Os, VBUS, and other signals

　　• 96kB RAM, 256kB ROM

　　• 8kB One-Time-Programmable (OTP) ROM

　　- Includes on-chip charge pump

　　• Configuration programming via OTP ROM, SPI external memory, or SMBus

　　• FlexConnect

　　- The roles of the upstream and all downstream ports are reversible on command

　　• Multi-Host Endpoint Reflector

　　- Integrated host-controller endpoint reflector via CDC/NCM device class for automotive applications

　　• USB Bridging

　　- USB to I2C, SPI, I2S, and GPIO

　　• PortSwap

　　- Configurable USB 2.0 differential pair signal swap

　　• PHYBoost

　　- Programmable USB transceiver drive strength for recovering signal integrity

　　• VariSense

　　- Programmable USB receive sensitivity

　　• USB Power Delivery Billboard Device Support

　　- Internal port can enumerate as a Power Delivery Billboard device to communicate Power Delivery Alternate Mode negotiation failure cases to host

　　• Compatible with Microsoft Windows 10, 8, 7, XP, Apple OS X 10.4+, and Linux hub drivers

　　• Optimized for low-power operation and low thermal dissipation

　　• 100-pin VQFN package (12mm x 12mm)

　　USB7216目标应用:

　　• Standalone USB Hubs

　　• Laptop Docks

　　• PC Motherboards

　　• PC Monitor Docks

　　• Multi-function USB 3.1 Gen 2 Peripherals

　　图1. USB7216内部框图-上行Type-B应用

　　评估板EVB-USB7216

　　The EVB-USB7216 Evaluation Kit is a demonstration and evaluation platform that provides the necessary requirements and interface options for evaluating the USB7216, which is a six-port Hi-Speed (HS) USB smart hub on a four-layer RoHS-compliant Printed Circuit Board (PCB). This allows users to gain an understanding of the product and accelerate the integration of the USB7216 into their designs.

　　The EVB-USB7216 is compliant with USB 3.2 Gen2 on the upstream port and on downstream ports 1 to 4. The EVB-USB7216 is also compliant with the USB 2.0 HS, Full-Speed (FS), and Low-Speed (LS) USB signaling.

　　The evaluation platform supports six downstream ports: one single Type-C port, four Gen2 ports, and one USB2.0 port with Type-A connectors. The EVB-USB7216 platform

　　also supports battery charging on all six downstream ports (maximum of 10A at any one time). The EVB-USB7216 supports FlexConnect role reversal for any of the downstream ports with the upstream port.

　　The EVB-USB7216 has four configurations for operation through internal default settings

　　and supports custom configurations through I2C or through the external 16-Mbit SPI Flash device.

　　The EVB-USB7216 demonstrates driver compatibility with Microsoft Windows® 10, Windows 8.x, Windows 7, Windows XP, Mac OS® X 10.4+, and Linux® hub drivers.

　　评估板EVB-USB7216主要特性:

　　• Microchip’s PortSwap, PHYBoostTM, and VariSenseTM technologies

　　• USB7216 in a 100-pin QFN RoHS compliant package

　　• USB 3.2 compliant (Gen2 operation)

　　• USB 2.0 compliant (HS, FS, and LS operations)

　　• 5V-tolerant USB pins

　　• Self-powered operation

　　• USB Gen2 Type-uB upstream port

　　• Six downstream USB ports:

　　- Five Gen2 downstream ports (One Type-C Port)

　　- One USB 2.0-only downstream port

　　• All downstream ports support individual port power and overcurrent sense.

　　• All downstream ports can be enabled for battery charging with the battery charging select shunts J10 and J14. (BC1.2 or SE1, 2.1A maximum per port)

　　• Onboard SPI Flash for external downloadable firmware

　　• Operates from a single voltage (+12.0V, regulated) external power supply

　　• Onboard 25 MHz crystal or oscillator input

　　• Single onboard +5.2V, 15A regulator

　　• Single onboard +3.3V, 0.5A regulator

　　• Single onboard +1.2V, 2A regulator

　　• Port Power LED indicators

　　• SPI Flash activity blue LED indicator

　　• Reset red LED indicator

　　• Green LED indicators for 5V, 3.3V, and 1.2V regulator outputs

　　• Terminal block connector for use with an external 12 VDC bench supply

　　• Barrel connector for use with a Microchip 12V power supply

　　• Removable or non-removable downstream port options can be configured with select shunt on J13.

　　• Bridge peripheral functions:

　　- USB-to-UART (CDC)

　　- USB-to-I2S™ Audio Codec

　　- USB-to-I2C

　　评估板EVB-USB7216包括:

　　The EVB-USB7216 Evaluation Kit includes the basic equipment necessary for evaluation.

　　The items included in the kit are:

　　• EVB-USB7216 Evaluation Board

　　• Type-A to Type-uB USB cable

　　图2. 评估板EVB-USB7216框图

　　图3. 评估板EVB-USB7216外形图