SMSC USB4640高速HSIC USB集线控制参考设计方案

SMSC 公司的USB4640/USB4640i是超快的数字高速HSIC USB集线器和闪存媒体控制器,上游端口和HSIC 1.0兼容,支持USB 2.0标准,两个下游端口和USB2.0兼容,HSIC是数字内部连接总线,闪存媒体控制器和SD 2.0 / MMC 4.2 / MS 1.43 / MS-Pro 1.02 / MS-Pro-HG 1.01 / MS-Duo 1.10 / xD 1.2兼容. USB4640/USB4640i可用于3G/4G手机,计算机,打印机,GPS导航系统,媒体播放器,消费类A/V和机顶盒.本文介绍了USB4640/USB4640i的主要特性,产品亮点,方框图, 带HSIC的应用框图以及参考设计框图和电路图.

USB4640/USB4640i:Ultra-fast Digital Hi-Speed USB Hub and Flash Media Controller Combo

The SMSC USB4640/USB4640i is a Hi-Speed HSIC USB hub and card reader combo solution with an upstream port compliant to HSIC 1.0, a supplement to the USB 2.0 specification. The two downstream ports are compliant with the USB 2.0 specification. High Speed Inter-Chip (HSIC) is a digital interconnect bus that enables the use of USB technology as a low-power chip-to-chip interconnect at speeds up to 480 Mb/s. The HSIC interface is an industry standard 2-pin digital interface which uses standard USB software. The SMSC USB4640/USB4640i provides an ultra fast interface between an HSIC enabled host and today’s popular flash media formats. The controller allows read/write capability to flash media from the following families:

– Secure DigitalTM (SD)

– MultiMediaCardTM (MMC)

– Memory Stick® (MS)

– xD Picture CardTM (xD)1

The USB4640/USB4640i offers a versatile, cost-effective, and energy-efficient hub controller with 2 downstream USB 2.0 ports. This combo solution leverages SMSC’s innovative technology that delivers industry-leading data throughput in mixed-speed USB environments. Average sustained transfer rates exceeding 35 MB/s are possible2.

USB4640/USB4640i 产品亮点:

Upstream HSIC port and 2 exposed Hi-Speed USB 2.0 downstream ports for external peripheral expansion

The dedicated flash media reader is internally attached to a 3rd downstream port of the hub as a USB Compound Device

— a single or multiplexed flash media reader interface

PortMap

— Flexible port mapping and port disable sequencing supports multiple platform designs

PortSwap

— Programmable USB differential-pair pin locations eases PCB design by aligning USB signal traces directly to connectors

PHYBoost

— Programmable USB transceiver drive strength recovers signal integrity

USB4640/USB4640i 主要特性:

Compliance with the following flash media card specifications SD 2.0 / MMC 4.2 / MS 1.43 / MS-Pro 1.02 / MS-Pro-HG 1.01 / MS-Duo 1.10 / xD 1.2

Low-power digital HSIC interface offers a replacement for onboard host and device connection for analog USB bus cable

HSIC interface enables printers, mobile PCs, ultra-mobile PCs, and cell phone products to reduce the total power budget while taking full advantage of USB connectivity and compatibility with existing USB drivers and software

External 1.2 V reference allows upstream and downstream HSIC links to use the same voltage reference

Supports a single external 3.3 V supply source; internal regulators provide 1.8 V internal core voltage for additional bill of materials and power savings

The transaction translator (TT) in the hub supports operation of Full-Speed and Low-Speed peripherals

9 K RAM | 64 K on-chip ROM

Enhanced EMI rejection and ESD protection performance

Hub and flash media reader/writer configuration from a single source: External I2C ROM or external SPI ROM

— Configures internal code using an external I2C EEPROM

— Supports external code using an SPI Flash EEPROM

— Customizable vendor ID, product ID, and language ID if using an external EEPROM

Up to 9 configurable GPIOs for special functions

The USB4640 supports the commercial temperature range of 0℃ to +70℃

The USB4640i supports the industrial temperature range of -40℃ to +85℃

48-pin QFN lead-free, RoHS compliant package (7x7 mm)

USB4640/USB4640i 应用:

3G/4G handsets, smartphones, cell phones, and other mobile devices

Desktop and mobile PCs

Printers

GPS navigation systems

Media players/viewers

Consumer A/V

Set-top boxes



图1.USB4640/USB4640i 方框图



图2.带HSIC的应用框图

USB4640QFN48 参考设计



图3. USB4640QFN48 参考设计框图



图4.USB4640QFN48 参考设计电路图(1)



图5.USB4640QFN48 参考设计电路图(2)