USB2640I Standard Microsystems Corp., USB2640I Datasheet - Page 31

• 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
7.3.2.5
7.3.2.6
7.3.2.7
NUMBER
NUMBER
NUMBER
BYTE
BYTE
BYTE
59:0
59:0
7:0
22h-5Dh: USB Manufacturer String Length
5Eh-99h: USB Product String Length
Note 7.2
9Ah: USB BmAttribute (1 byte)
USB_MFR_STR
USB_PRD_STR
USB_BM_ATT
BYTE NAME
BYTE NAME
BYTE NAME
While the full strings are reported during USB enumeration, Windows XP/Vista reads
concatenated version of the strings from the standard SCSI inquiry response when storing
the values for display in the Windows registry and device manager.
Self- or Bus-Power: Selects between Self- and Bus-Powered operation.
The hub is either Self-Powered (draws less than 2 mA of upstream bus
power) or Bus-Powered (limited to a 100 mA maximum of upstream power
prior to being configured by the host controller).
When configured as a Bus-Powered device, the SMSC hub consumes less
than 100 mA of current prior to being configured. After configuration, the
Bus-Powered SMSC hub (along with all associated hub circuitry, any
embedded devices if part of a compound device, and 100 mA per externally
available downstream port) must consume no more than 500 mA of
upstream VBUS current. The current consumption is system dependent, and
the OEM must ensure that the USB 2.0 specifications are not violated.
When configured as a Self-Powered device, <1 mA of upstream VBUS
current is consumed and all ports are available, with each port being capable
of sourcing 500 mA of current.
80 = Bus-Powered operation
c0 = Self-Powered operation
A0 = Bus-Powered operation with remote wake-up
E0 = Self-Powered operation with remote wake-up
Product String Length
Manufacturer String Length
Maximum string length is 28 characters.
(See
This string will be used during the USB enumeration process in Windows.
Maximum string length is 28 characters.
(See
Note 7.2
Note 7.2
DATASHEET
below)
below)
31
DESCRIPTION
DESCRIPTION
DESCRIPTION
Revision 2.0 (10-03-08)