USB2640I Standard Microsystems Corp., USB2640I Datasheet - Page 40

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

Revision 2.0 (10-03-08)
7.3.3.20
7.3.3.21
NUMBER
NUMBER
BIT
BIT
7:0
7:0
E7h: Non-Removable Device
E8h: Port Disable For Self-Powered Operation
PORT_DIS_SP
BYTE NAME
BYTE NAME
NR_DEVICE
Non-removable Device: Indicates which port(s) include non-removable
devices. ‘0’ = port is removable, ‘1’ = port is non-removable.
Informs the host if one of the active ports has a permanent device that is
undetachable from the hub. (Note: The device must provide its own
descriptor data.)
When using the internal default option, the NON_REM[1:0] pins will
designate the appropriate ports as being non-removable.
Bit 7= Reserved
Bit 6= Reserved
Bit 5= Reserved
Bit 4= Reserved
Bit 3= 1; port 3 non-removable
Bit 2= 1; Port 2 non-removable
Bit 1= 1; Port 1 non removable
Bit 0= Reserved, always = ‘0’
Note:
Port Disable Self-Powered: Disables 1 or more ports. ‘0’ = port is available,
‘1’ = port is disabled.
During Self-Powered operation
permanently disabled. The ports are unavailable to be enabled or
enumerated by a Host Controller. The ports can be disabled in any order
since the internal logic will automatically report the correct number of
enabled ports to the USB host and will reorder the active ports in order to
ensure proper function.
Bit 7= Reserved
Bit 6= Reserved
Bit 5= Reserved
Bit 4= Reserved
Bit 3= 1; Port 3 is disabled
Bit 2= 1; Port 2 is disabled
Bit 1= 1; Port 1 is disabled
Bit 0= Reserved, always = ‘0’
Bit 1 must be set to a ‘1’ by the firmware for proper identification of
the card reader as a non-removable device.
Industrial Temperature USB 2.0 Flash Media Controller and USB Hub Combo
DATASHEET
40
DESCRIPTION
DESCRIPTION
th
is register selects the ports which will be
SMSC USB2640i/USB2641i