USB4640-HZH SMSC [SMSC Corporation], USB4640-HZH Datasheet - Page 28

• Manufacturer Part Number: USB4640-HZH
• Description: High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
• Manufacturer: SMSC [SMSC Corporation]

Chapter 8 Configuration Options
Revision 1.0 (06-09-09)
8.1
8.1.1
8.1.1.1
8.2
8.3
8.3.1
SMSC’s USB 2.0 hub is fully compliant to the Universal Serial Bus Specification available from the
USB Implementer’s Forum found at http://www.usb.org (Revision 2.0 April 27, 2000 and the 12/7/2000
and 5/28/2002 Errata). Please reference Chapter 11 (Hub Specification) for general details regarding
hub operation and functionality.
For performance reasons, the hub provides 1 transaction translator (TT) that is shared by both
downstream ports defined as a single-TT configuration. The TT contains 4 non-periodic buffers.
Hub Configuration Options
The SMSC hub supports a large number of features (some are mutually exclusive), and must be
configured in order to correctly function when attached to a USB host controller. There are two principal
ways to configure the hub:
Power Switching Polarity
The hub will only support active high power controllers.
The SMSC USB4640/USB4640i is fully compliant with the following flash media card reader
specifications:
EEPROM/SPI Interface
The USB4640/USB4640i can be configured via a 2-wire (I
flash device containing the firmware for the USB4640/USB4640i. If an external configuration device
does not exist the internal default values will be used. If one of the external devices is used for
configuration, the OEM can update the values through the USB interface. The hub will then “attach”
to the upstream USB host.
Hub
Card Reader
System Configurations
via the internal default settings or
by settings stored in an external EEPROM or SPI Flash device.
Secure Digital 2.0 / MultiMediaCard 4.2
-SD 2.0, HS-SD, HC-SD
-TransFlash™ and reduced form factor media
-1/4/8 bit MMC 4.2
Memory Stick 1.43
Memory Stick Pro Format 1.02
Memory Stick Pro-HG Duo Format 1.01
-Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro
Memory Stick Duo 1.10
xD-Picture Card 1.2
DATASHEET
High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
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C) EEPROM (512x8) or an external SPI
SMSC USB4640/USB4640i
Datasheet