Datasheet
Highly Integrated Full Featured Hi-Speed USB 2.0 ULPI Transceiver
Datasheet
Revision 1.0 (07-14-09) 64 SMSC USB3320
DATASHEET
7.1.1.7 OTG Control
Address = 0A-0Ch (read), 0Ah (write), 0Bh (set), 0Ch (clear)
ClockSuspendM 3 rd/w/s/c 0b Enables Link to turn on 60MHz CLKOUT in Serial
Mode or Carkit Mode.
0b: Disable clock in serial or Carkit Mode.
1b: Enable clock in serial or Carkit Mode.
AutoResume 4 rd/w/s/c 0b Only applicable in Host mode. Enables the
transceiver to automatically transmit resume
signaling. This function is detailed in Section 6.2.4.4.
IndicatorComplement 5 rd/w/s/c 0b Inverts the EXTVBUS signal. This function is detailed
in Section 5.6.2.
Note: The EXTVBUS signal is always high on the
USB3320.
IndicatorPassThru 6 rd/w/s/c 0b Disables and’ing the internal VBUS comparator with
the EXTVBUS signal when asserted. This function is
detailed in Section 5.6.2.
Note: The EXTVBUS signal is always high on the
USB3320.
InterfaceProtectDisable 7 rd/w/s/c 0b Used to disable the integrated STP pull-up resistor
used for interface protection. This function is detailed
in Section 6.3.3.
FIELD NAME BIT ACCESS DEFAULT DESCRIPTION
IdPullup 0 rd/w/s/c 0b Connects a 100kΩ pull-up resistor from the ID pin to
VDD33
0b: Disables the pull-up resistor
1b: Enables the pull-up resistor
DpPulldown 1 rd/w/s/c 1b Enables the 15k Ohm pull-down resistor on DP.
0b: Pull-down resistor not connected
1b: Pull-down resistor connected
DmPulldown 2 rd/w/s/c 1b Enables the 15k Ohm pull-down resistor on DM.
0b: Pull-down resistor not connected
1b: Pull-down resistor connected
DischrgVbus 3 rd/w/s/c 0b This bit is only used during SRP. Connects a resistor
from VBUS to ground to discharge VBUS.
0b: disconnect resistor from VBUS to ground
1b: connect resistor from VBUS to ground
ChrgVbus 4 rd/w/s/c 0b This bit is only used during SRP. Connects a resistor
from VBUS to VDD33 to charge VBUS above the
SessValid threshold.
0b: disconnect resistor from VBUS to VDD33
1b: connect resistor from VBUS to VDD33
DrvVbus 5 rd/w/s/c 0b Enables external 5 volt supply to drive 5 volts on
VBUS. This signal is or’ed with DrvVbusExternal.
0b: Do not drive Vbus, CPEN driven low.
1b: Drive Vbus, CPEN driven high.
FIELD NAME BIT ACCESS DEFAULT DESCRIPTION