Public Version
High-Speed USB Host Subsystem
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Bits
Field Name
Description
Type
Reset
7:6
HCFS
Host Controller Functional State
RW
0x0
0x0: HCFS: USB Reset
0x1: HCFS: USB Resume
0x2: HCFS: USB Operational
0x3: HCFS: USB Suspend
5
BLE
Bulk list processing enable.
RW
0
0x0: Bulk ED list is not processed after the next SOF.
0x1: Enables processing of bulk ED list in the next frame.
4
CLE
Control list processing enable.
RW
0
0x0: Control ED list is not processed after the next SOF.
0x1: Enables processing of control ED list in the next
frame.
3
IE
Isochronous ED processing enabled by Host Controller
RW
0
Driver.
0x0: Isochronous EDs are not processed
0x1: Enables processing of isochronous EDs.
2
PLE
Periodic list enable
RW
0
0x0: Periodic ED lists are not processed after the next
frame.
0x1: Enables processing of periodic ED lists in the next
frame.
1:0
CBSR
Control/bulk service ratio. Specifies the ratio between
RW
0x0
control and bulk EDs processed in a frame.
0x0: One control ED per bulk ED
0x1: Two control ED per bulk ED
0x2: Three control ED per bulk ED
0x3: Four control ED per bulk ED
Table 22-167. Register Call Summary for Register HCCONTROL
High-Speed USB Host Subsystem
•
High-Speed USB Host Subsystem Register Summary
Table 22-168. HCCOMMANDSTATUS
Address Offset
0x0000 0008
Physical Address
0x4806 4408
Instance
OHCI
Description
HC Command and 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
SOC
RESERVED
BLF
CLF
HCR
OCR
Bits
Field Name
Description
Type
Reset
31:18
RESERVED
Reserved
R
0x0000
17:16
SOC
Scheduling overrun count.
R
0x0
This is used to monitor any persistent scheduling
problems.
These bits are incremented on each scheduling overrun
error. It is initialized to 0x0 and wraps around at 0x3.
15:4
RESERVED
Reserved
R
0x000
3
OCR
Ownership change request.
RW
0
3328
High-Speed USB Host Subsystem and High-Speed USB OTG Controller
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated