USB2640I Standard Microsystems Corp., USB2640I Datasheet - Page 9

• Manufacturer Part Number: USB2640I
• Description: Industrial Temperature Usb 2.0 Flash Media Controller And Usb Hub Combo
• Manufacturer: Standard Microsystems Corp.

Industrial Temperature USB 2.0 Flash Media Controller and USB Hub Combo
SMSC USB2640i/USB2641i
1.2
Hub
A default configuration is available in the USB2640i/USB2641i following a reset. The
USB2640i/USB2641i may also be configured by an external I
The USB2640i/USB2641i supports several OEM selectable features:
Flash Media Controller
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.
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
LED blink interval or duration
DATASHEET
9
2
C EEPROM or via external SPI flash.
Revision 2.0 (10-03-08)