USB2642-I/ML

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1. Description

The USB2642-I/ML is a USB 2.0 compliant, hi-speed hub and card reader combo solution. This fully-integrated, single chip solution provides USB expansion and flash media reader/writer integration. The Microchip USB2642-I/ML provides an ultra fast interface between a USB host and today’s popular flash media formats. The USB2642-I/ML offers a versatile, cost-effective and energy-efficient hub controller with 2 downstream USB 2.0 ports and a flash media interface. The flash media interface can support sustained transfer rates exceeding 35 MB/s. Additionally, the USB2642-I/ML provides an I2CTM over USB bridge and an SD over USB bridge. The I2C bridge allows for control of any I2C slave device operating at 50KHz serial clock.

2. The controller allows read/write capability to flash media including the following

    1. Secure DigitalTM (SD)

    2. SD High CapacityTM (SDHC)

    3. SD Extended CapacityTM (SDXC)

    4. MultiMediaCardTM(MMC)

    5. Embedded MultiMediaCardTM (eMMC)

2. Features

    1. Single-chip USB 2.0 hub controller with 2 exposed hi-speed downstream ports

    2. The dedicated flash media reader is internally attached to a 3rd downstream port of the hub as a USB compound device

    3. Hub and flash media reader/writer configuration from a single source:

        - Configures internal code using an external SPI ROM

        - Supports execution of external code from SPI Flash EEPROM

        - Supports custom vendor, product, and language ID when using an external EEPROM

    4. Supports full power management with individual or ganged power control of each downstream port

    5. Transaction Translator (TT) in the hub supports operation of FS and LS peripherals

    6. Single 24 MHz crystal support

    7. Control of peripheral I2C devices by USB host.

    8. Supports internally or externally regulated 1.8 V core voltage operation

    9. Supports storage addressability of up to 2TB

  10. RoHS compliant package

        - USB2642: 48-pin (7x7 mm²) QFN

  11. Temperature ranges:

        - Commercial Range (0 ºC to +70 ºC)

        - Industrial Range (-40 ºC to +85 ºC)

3. Applications

    1. Desktop and mobile PCs

    2. Monitors and televisions

    3. Mobile PC docking

    4. Consumer A/V

    5. Media players/viewers

    6. Printers

    7. Flash media card readers/writers

4. Highlights

    1. PortMap

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

    2. PortSwap

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

    3. PHYBoost

        - Programmable USB transceiver drive strength recovers signal integrity