HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 834

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 24
Rev. 3.00 Jan. 18, 2008 Page 772 of 1458
REJ09B0033-0300
Bit
31 to 18 
17
16
15 to 4
3
2
Bit Name
SOC1
SOC0

OCR
BLF
USB Host Controller (USBH)
Initial
Value
All 0
0
0
All 0
0
0
R/W
R
R/W
R/W
R
R/W
R/W
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Scheduling Overrun Count
These bits are incremented in each SchedulingOverrun
error. These bits are initially set to B'00 and returned to
B'11. These bits are incremented when
SchedulingOverrun is detected even though the SO bit in
USBHIS is set. These bits are used by HCD to monitor
any continuous scheduling problem.
Reserved
These bits are always read as 0. The write value should
always be 0.
Ownership Change Request
This bit is set by OS HCD to request the change of the
control of the host controller. When this bit is set, the host
controller sets the OC bit in USBHIS. After a change, this
bit is cleared and remains until the next request from OS
HCD.
0: After a change, this bit is cleared and remains until the
1: Set the OC bit in USBHIS
Bulk List Filled
This bit is used to indicate that there are some TDs in the
list. This bit is set by HCD to the list when TD is added to
ED.
When the host controller starts to process the head of the
list, it checks this bit. As long as this bit is 0, the host
controller does not start to process the list. When this bit is
1, the host controller starts to process the list to set BF to
0. When the host controller detects TD in the list, the host
controller sets this bit to 1. When TD is never found in the
list and HCD does not set this bit, the host controller
completes the processing of the list. This bit is still 0 when
the size list processing is stopped.
0: The list is not processed
1: The list is processed
next request from OS HCD