Information

SMSC USB4640/USB4640i Revision 1.3 (03-13-13)
PRODUCT PREVIEW
Data Brief
PRODUCT FEATURES
USB4640/USB4640i
High-Speed Inter-Chip (HSIC) USB 2.0 Hub
and Flash Media Controller
General Description
The SMSC USB4640/USB4640i is a Hi-Speed HSIC USB
hub and card reader combo solution with an upstream port
that is compliant to HSIC 1.0 (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
USB4640/USB4640i provides an ultra fast interface
between an HSIC enabled host and several popular flash
media formats. The controller allows read/write capability to
flash media from the following families:
— Secure Digital
TM
(SD)
— MultiMediaCard
TM
(MMC)
—Memory Stick
®
(MS)
— xD-Picture Card
TM
(xD)
1
The USB4640/USB4640i 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 possible
2
.
Highlights
 Upstream HSIC port and 2 exposed Hi-Speed USB 2.0
downstream ports for external peripheral expansion
 Dedicated flash media reader internally attached to a 3rd
downstream port of the hub as a USB compound device
— single or multiplexed flash media reader interface
 PortMap
— Flexible port mapping and disable sequencing
 PortSwap
— Programmable USB differential-pair pin locations ease PCB
design by aligning USB signal lines directly to connectors
 PHYBoost
— Programmable USB signal drive strength for recovering
signal integrity using 4-level driving strength resolution
Features
 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; and 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
 HSIC interface provides use of USB connectivity and
compatibility with existing USB drivers and software
 External 1.2 V reference allows upstream/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 hub transaction translator (TT) supports Full-Speed
and Low-Speed peripheral operation
 9 KB RAM | 64 KB on-chip ROM
 Enhanced EMI rejection and ESD protection
performance
 Hub and flash media reader/writer configuration from a
single source:
— Configures internal code using an external I
2
C 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°C to +70°C
 The USB4640i supports the industrial temperature range
of -40°C to +85°C
 48-pin QFN (7 x 7 mm) lead-free, RoHS compliant
package
Applications
 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
 Industrial products
1. Obtain user license from the xD-Picture Card Li-
cense Office.
2. Host and media dependent.