Datasheet

High-Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
Datasheet
SMSC USB4640/USB4640i 9 Revision 1.3 (03-13-13)
DATASHEET
 Compliance with the following flash media card specifications:
—Secure Digital 2.0 and MultiMediaCard 4.2
–SD 2.0, SD-HS, SD-HC
–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, MS-HS, MS Pro-HG, MS Pro
—Memory Stick Duo 1.10
–xD-Picture Card 1.2
 Up to 9 GPIOs: configuration and polarity for special function use
—The number of actual GPIOs depends on the implementation configuration used
—One GPIO available with up to 200 mA drive and protected fold-back short circuit current
 8051 8-bit microprocessor
—60 MHz - single cycle execution
—64 KB ROM | 9 KB RAM
 Integrated regulator for 1.8 V core operation
1.2 Software Features
 Hub and flash media reader/writer configuration from a single source: External I
2
C ROM or external
SPI ROM, where the following features are then available:
—Customizable vendor ID, product ID, and device ID
—12-hex digits maximum for the serial number string
—28-character manufacturer ID and product strings for the flash media reader/writer
1.3 OEM Selectable Hub Features
The USB4640/USB4640i provides a default configuration that may be sufficient for most applications.
following a reset. The USB4640/USB4640i can instead be configured by an external I
2
C EEPROM or
SPI ROM.
 Compound Device support on a port-by-port basis
—a port is permanently hardwired to a downstream USB peripheral device
 Select over-current sensing and port power control on an individual or ganged (all ports together)
basis to match the OEM’s choice of circuit board component selection
 Port power control and over-current detection/delay features
 Configure the delay time for filtering the over-current sense inputs
 Configure the delay time for turning on downstream port power
 Bus- or self-powered selection
 Hub port disable or non-removable configurations
 Flexible port mapping and disable sequencing supports multiple platform designs
 Programmable USB differential-pair pin location eases PCB layout by aligning USB signal lines
directly to connectors
 Programmable USB signal drive strength recovers USB signal integrity using 4 levels of signal drive
strength
 Indicate the maximum current that the 2-port hub consumes
 Indicate the maximum current required for the hub controller