SMSC 公司的USB4640/USB4640i是超快的数字高速HS
IC 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 LOCAIIONs 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)
本文关键字：暂无联系方式电子技术，电工技术 - 电子技术
