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High-Speed USB Host Subsystem
Bits
Field Name
Description
Type
Reset
This bit is set to request a change of control of the host
controller.
2
BLF
Bulk list filled.
RW
0
This bit is used to indicate whether there are any TDs on
the bulk list. It is set whenever it adds a TD to an ED in
the bulk list.
1
CLF
Control list filled.
RW
0
This bit is used to indicate whether there are any TDs on
the control list. It is set whenever it adds a TD to an ED in
the control list.
0
HCR
Host controller reset. (software reset) Set this bit to
RW
0
initiate a USB host controller reset. This resets most USB
host controller OHCI registers. OHCI register accesses
must not be attempted until a read of this register returns
a 0.
0x0: No effect
0x1: USB host controller is reset.
Table 22-169. Register Call Summary for Register HCCOMMANDSTATUS
High-Speed USB Host Subsystem
•
High-Speed USB Host Subsystem Register Summary
•
High-Speed USB Host Subsystem Register Description
:
Table 22-170. HCINTERRUPTSTATUS
Address Offset
0x0000 000C
Physical Address
0x4806 440C
Instance
OHCI
Description
HC Interrupt Status
Type
RW
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
RESERVED
SF
UE
RD
SO
OC
FNO
WDH
RHSC
RESERVED
Bits
Field Name
Description
Type
Reset
31
RESERVED
Reserved
R
0
30
OC
Ownership change.
R
0
This bit is set when the
USBHOST.
[3] OCR bit is set.
Read 0x1: An ownership change has occurred.
Write 0x0: No effect
Write 0x1: Clears this bit
29:7
RESERVED
Reserved
R
0x000000
6
RHSC
Root hub status change.
RW
0
When 0x1: A root hub status change has occurred.
Write 0x0: No effect.
Write 0x1: Clears this bit.
5
FNO
Frame number overflow.
RW
0
When 0x1: A frame number overflow has occurred.
Write 0x0: No effect.
Write 0x1: Clears this bit.
3329
SWPU177N – December 2009 – Revised November 2010
High-Speed USB Host Subsystem and High-Speed USB OTG Controller
Copyright © 2009–2010, Texas Instruments Incorporated