Highly Integrated Full Featured Hi-Speed USB 2.0 ULPI Transceiver
Datasheet
FIELD NAME
BIT
ACCESS
DEFAULT DESCRIPTION
DrvVbusExternal
6
rd/w/s/c
0b
Enables external 5 volt supply to drive 5 volts on
VBUS. This signal is or’ed with DrvVbus.
0b: Do not drive Vbus, CPEN driven low.
1b: Drive Vbus, CPEN driven high.
UseExternalVbus
Indicator
7
rd/w/s/c
0b
Tells the transceiver to use an external VBUS over-
current or voltage indicator. This function is detailed
in Section 5.6.2.
0b: Use the internal VbusValid comparator
1b: Use the EXTVBUS input as for VbusValid signal.
Note:
The EXTVBUS signal is always high on the
USB3320.
7.1.1.8
USB Interrupt Enable Rising
Address = 0D-0Fh (read), 0Dh (write), 0Eh (set), 0Fh (clear)
FIELD NAME
BIT
ACCESS
DEFAULT DESCRIPTION
HostDisconnect Rise
0
rd/w/s/c
1b
Generate an interrupt event notification when
Hostdisconnect changes from low to high. Applicable
only in host mode.
VbusValid Rise
SessValid Rise
SessEnd Rise
IdGnd Rise
1
2
rd/w/s/c
rd/w/s/c
rd/w/s/c
rd/w/s/c
rd
1b
1b
Generate an interrupt event notification when
Vbusvalid changes from low to high.
Generate an interrupt event notification when
SessValid changes from low to high.
3
1b
Generate an interrupt event notification when
SessEnd changes from low to high.
4
1b
Generate an interrupt event notification when IdGnd
changes from low to high.
Reserved
7:5
000b
Read only, 0.
7.1.1.9
USB Interrupt Enable Falling
Address = 10-12h (read), 10h (write), 11h (set), 12h (clear)
FIELD NAME
BIT
ACCESS
DEFAULT DESCRIPTION
HostDisconnect Fall
0
rd/w/s/c
1b
Generate an interrupt event notification when
Hostdisconnect changes from high to low. Applicable
only in host mode.
VbusValid Fall
SessValid Fall
SessEnd Fall
IdGnd Fall
1
2
3
4
rd/w/s/c
rd/w/s/c
rd/w/s/c
rd/w/s/c
1b
1b
1b
1b
Generate an interrupt event notification when
Vbusvalid changes from high to low.
Generate an interrupt event notification when
SessValid changes from high to low.
Generate an interrupt event notification when
SessEnd changes from high to low.
Generate an interrupt event notification when IdGnd
changes from high to low.
SMSC USB3320
Revision 1.0 (07-14-09)
DATA6S5HEET
SMSC [ SMSC CORPORATION ]
