Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
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reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
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version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
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Revision 2.0 (10-03-08)
PRODUCT PREVIEW
2
SMSC USB2640i/USB2641i
Industrial Temperature USB 2.0 Flash Media Controller and Hub Combo
Overview
The SMSC USB2640i/USB2641i is an integrated USB 2.0 compliant, Hi-Speed hub for USB port
expansion with an attached bulk only mass storage class peripheral controller. This multi-format flash
media controller and USB Hub Combo features 3 downstream ports: one port is dedicated to an
internally connected ultra fast flash media reader/writer and 2 exposed downstream ports are available
for external peripheral expansion.
The SMSC USB2640i/USB2641i is an ultra fast, OEM configurable, hub controller IC with 3
downstream ports for embedded USB solutions. The USB2640i/USB2641i will attach to an upstream
port as a Full-Speed Hub or as a Full-/Hi-Speed Hub. The hub supports Low-Speed, Full-Speed, and
Hi-Speed (if operating as a Hi-Speed Hub) downstream devices on all of the enabled downstream
ports.
All required resistors on the USB ports are integrated into the hub. This includes all series termination
resistors on D+ and D– pins and all required pull-down and pull-up resistors on D+ and D– pins. The
over-current sense inputs for the downstream facing ports have internal pull-up resistors.
The USB2640i/USB2641i includes over 30 programmable features including:
PortMap
(also referred to as port remap) which provides flexible port mapping and disable sequences.
The downstream ports of a USB2640i/USB2641i hub can be reordered or disabled in any sequence
to support multiple platform designs with minimum effort. For any port that is disabled, the
USB2640i/USB2641i automatically reorders the remaining ports to match the USB host controller’s port
numbering scheme.
PortSwap
which adds per-port programmability to USB differential-pair pin locations. PortSwap allows
direct alignment of USB signals (D+/D-) to connectors avoiding uneven trace length or crossing of the
USB differential signals on the PCB.
PHYBoost
which enables four programmable levels of USB signal drive strength in downstream port
transceivers. PHYBoost attempts to restore USB signal integrity that has been compromised by system
level variables such as poor PCB layout, long cables, etc.
SMSC USB2640i/USB2641i
PRODUCT PREVIEW
3
Revision 2.0 (10-03-08)
Industrial Temperature USB 2.0 Flash Media Controller and Hub Combo
Device Features
Hardware Features
Single chip flash media controller
The SMSC USB2640i/USB2641i supports the industrial temperature range of -40°C to 85°C
Transaction translator (TT) in the hub supports operation of FS and LS peripherals
Full power management with individual or ganged power control of each downstream port
Optional support for external firmware access via SPI interface
- 30 MHz or 60 MHz operation support
- Single bit or dual bit mode support
- Mode 0 or mode 3 SPI support
Memory Stick Specification 1.43
Memory Stick Pro Format Specification 1.02
Memory Stick Pro-HG Duo Format Specification 1.01 compliant
- Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro
xD-Picture Card 1.2 compliant
Secure Digital 2.0 / MultiMediaCard Specification 4.3 compliant
- SD 2.0, HS-SD, HC-SD
- TransFlash™ and reduced form factor media
- 1/4/8 bit MMC 4.2
SDIO and MMC streaming mode support
On board 24 MHz crystal driver circuit
Optional external 24 MHz clock input. Must be used with an external resistor divider to provide a
1.8V signal.
GPIO configuration and polarity
- Up to 8 GPIOs for special function use: LED indicators, button inputs, power control to memory
devices, etc. The number of actual GPIO’s depends on the implementation configuration used.
- One GPIO with up to 200 mA drive.
Internal card power FET
-Up to 200 mA operation available
-"Fold-back" short circuit current protected
8051 8-bit microprocessor
- 60 MHz - single cycle execution
- 64 KB ROM; 9 KB RAM
Internal Regulator for 1.8V core operation
Optimized pinout improves signal flow, easing implementation and allowing for improved signal
integrity treatment
Software Features
Optimized for low latency interrupt handling
Hub and flash media reader/writer configuration from a single source: External I
2
C ROM or external
SPI ROM
EEPROM update via USB
Please see the USB2640i/USB2641i Software Release Notes for additional software features
Revision 2.0 (10-03-08)
PRODUCT PREVIEW
4
SMSC USB2640i/USB2641i
Industrial Temperature USB 2.0 Flash Media Controller and Hub Combo
OEM Selectable Features
Hub
A default configuration is available in the USB2640i/USB2641i following a reset. The
USB2640i/USB2641i may also be configured by an external I
2
C EEPROM or via external SPI flash.
The USB2640i/USB2641i supports several OEM selectable features:
Compound device support (port is permanently hardwired to a downstream USB peripheral device),
on a port-by-port basis.
Select over-current sensing and port power control on an individual (port-by-port) 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
Port signal swapping for easier board layout
Flexible port mapping and disable sequence. Ports can be disabled/reordered in any sequence to
support multiple platforms with a single design. The hub will automatically reorder the remaining
ports to match the host controller's numbering scheme.
Programmable USB differential-pair pin location.
- Eases PCB layout by aligning USB signal lines directly to connectors
Programmable USB signal drive strength. Recover USB signal integrity due to compromised
system environments using 4 levels of signal drive strength.
Indicate the maximum current that the 2-port hub consumes from the USB upstream port.
Indicate the maximum current required for the hub controller.
Flash Media Controller
Customize vendor ID, product ID, and device ID.
12-hex digit (max) serial number string
Customizable vendor specific data by optional use of external serial EEPROM
28-character manufacturer ID and product string for flash media reader/writer
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