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USB4912

USB2.0 Hi-Speed Automotive Hub

Status: Future Product

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Device Overview

Summary

The Microchip USB4912  is a USB2.0 Hi-Speed Hub with unique Smart Hub features targeted to automotive consumer ports and head unit applications. The USB4912 is compliant with the USB 2.0 Specification and has passed AEC-Q100 testing.  This highly integrated chip optimizes board area and reduces overall system costs, with the incorporation of  leadership functionality, including;  Multi-Host Endpoint Reflector, battery charging support for industry profiles, embedded 32 bit micro-controller for the implementation of  USB IO bridging and USB Power Delivery.  The multiple downstream USB ports support USB2.0 Low Speed/Full Speed/Hi-Speed with a single USB2.0 Hi-Speed upstream port for host connection.

The Multi-Host Endpoint Reflector employs patented technology such that USB data is 'mirrored" between two USB hosts (Multi-Host) in order to execute USB transactions. This capability is fundamental in delivering architectures for smart phones that require host / device swapping in order to set-up an automotive session, including graphic user interface, from the mobile device to the head unit display. 

Standard USB drivers, which are  native to the operating system, including the CDC/NCM class driver, are utilized to execute device operation. No custom drivers are required.  The Multi-Host Endpoint Reflector is considered a USB controller that is integrated in conjunction with a USB 2.0 Hi-Speed hub and USB2.0 dual role function physical interfaces. 

Contact your Microchip local sales support for information on support documents, demonstration application boards, configuration software, datasheet and application notes. 

Additional Features
  • USB2.0 Hi-Speed Hub 1 Upstream port for USB Host connection 1 downstream ports with dual role (host/device) physical interfaces 1 Non-removable port for cascading hubs or attaching card reader device
  • 1 Upstream port for USB Host connection
  • 1 downstream ports with dual role (host/device) physical interfaces
  • 1 Non-removable port for cascading hubs or attaching card reader device
  • Patented Multi-Host Endpoint Reflector
  • Device features to enable smart phone automotive sessions with head unit display
  • USB Battery Charging, revision 1.2, support on downstream ports (DCP, CDP, SDP)
  • Battery charging support for China and Apple profiles
  • USB to I2C, SPI, and GPIO Apple authentication support
  • Apple authentication support
  • Interfaces to Microchip UPD350, Power Delivery Interface device
  • SPI Flash provides flexibility for specification revisions and evolving system needs
  • MultiTRAK Dedicated transaction translator per port
  • Dedicated transaction translator per port
  • PortMap Configurable port mapping and disable sequencing
  • Configurable port mapping and disable sequencing
  • PortSwap Configurable differential intra-pair signal swapping
  • Configurable differential intra-pair signal swapping
  • PHYBoost
  • Programmable USB receiver sensitivity
  • USB Link Power Management (LPM) support
  • Vendor Specific Messaging (VSM) support
  • Enhanced OEM configuration options available through external straps,  OTP configuration or SMBus Slave Port
  • 3.3V supply voltage
  • 40-pin (5 x 5mm) VQFN
  • Target Applications
    • Infotainment Head Units
    • Break-Out- Boxes
    • After-market automotive products GPS systems Infotainment systems Advanced instrumentations and controls
    • GPS systems
    • Infotainment systems
    • Advanced instrumentations and controls
    • LCD Monitors
    • Multi-function USB Peripherals
    • Embedded Automotive Systems
    • Host to Host applications via Ethernet / NCM communication
    • Media Hubs
Parametrics
Name
Value
Description
Automotive Hi-Speed, 3 Port Hub
Upstream Port
USB 2.0
USB Speed
Hi-Speed
Downstream Ports
2
MGMT I/F
I2C
ROM I/F
SPI, I2C for OTP
Op Voltage (V)
3.3
Per-Port Switching
Yes
Port Map
Yes
Port Swap
Yes
PHY Boost
Yes
Charging Emulation
BC1.2, Apple, China
Standalone Operation
Yes
Temp. Range Min.
-40
Temp. Range Max.
85

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