Highly Integrated Full Featured Hi-Speed USB 2.0 ULPI Transceiver
Datasheet
7.1.3
Vendor Register Access
The vendor specific registers include the range from 30h to 3Fh. These can be accessed by the ULPI
immediate register read / write.
7.1.3.1
HS TX Boost
Address = 31h (read / write)
FIELD NAME
BIT
ACCESS
DEFAULT DESCRIPTION
Reserved
Boost
4:0
6:5
rd
00000b
00b
Read only, 0.
rd/w
Sets the HS transmitter amplitude as described in
Section 5.2.1.
00b: Nominal
01b: Enables 11.1% increased drive strength
10b: Enables 7.4% increased drive strength
11b: Enables 3.7% increased drive strength
Reserved
7
rd
0b
Read only, 0.
7.1.3.2
Headset Audio Mode
Address = 33h (read / write)
FIELD NAME
BIT
ACCESS
DEFAULT DESCRIPTION
HeadsetAudioEn
3:0
rd/w
0000b
0h
When this field is set to a value of 1010, the Headset
Audio Mode is enabled as described in Section 6.7.
Reserved
7:4
rd
Read only, 0.
7.1.3.3
Vendor Rid Conversion
Address = 36-38h (read), 36h (write), 37h (set), 38h (clear)
FIELD NAME
BIT
ACCESS
DEFAULT DESCRIPTION
000b Conversion value of Rid resistor
RidValue
2:0
rd/w
000: 0 ohms
001: 75 ohms
010: 100K ohms
011: 200K ohms
100: 440K ohms
101: ID floating
111: Error
Note:
RidValue can also be read from the Carkit
Interrupt Status Register.
Revision 1.0 (07-14-09)
SMSC USB3320
DATA7S0HEET
SMSC [ SMSC CORPORATION ]
