Datasheet

SMSC USB4640/USB4640i Revision 1.3 (03-13-13)
DATASHEET
PRODUCT FEATURES
Datasheet
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 License
Office.
2. Host and media dependent.

Summary of content (62 pages)