Datasheet

USB 2.0 Hi-Speed 7-Port Hub Controller
Datasheet
SMSC USB2517 25 Revision 2.8 (09-17-12)
DATASHEET
7.2.1.10 Register 09h: Non-Removable Device
7.2.1.11 Register 0Ah: Port Disable For Self Powered Operation
BIT
NUMBER BIT NAME DESCRIPTION
7:0 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= 1; Port 7 non-removable
Bit 6= 1; Port 6 non-removable
Bit 5= 1; Port 5 non-removable
Bit 4= 1; Port 4 non-removable
Bit 3= 1; Port 3 non-removable
Bit 2= 1; Port 2 non-removable
Bit 1= 1; Port 1 non-removable
Bit 0 is Reserved, always = ‘0’
BIT
NUMBER BIT NAME DESCRIPTION
7:0 PORT_DIS_SP Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port
is available, ‘1’ = port is disabled.
During Self-Powered operation when remapping mode is disabled
(PRTMAP_EN='0'), this selects the ports which will be permanently disabled,
and are not available to be enabled or enumerated by a Host Controller. The
ports can be disabled in any order, 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= 1; Port 7 is disabled
Bit 6= 1; Port 6 is disabled
Bit 5= 1; Port 5 is disabled
Bit 4= 1; Port 4 is disabled
Bit 3= 1; Port 3 is disabled
Bit 2= 1; Port 2 is disabled
Bit 1= 1; Port 1 is disabled
Bit 0 is Reserved, always = ‘0’