HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 832

• 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 770 of 1458
REJ09B0033-0300
Bit
5
4
3
Bit Name
BLE
CLE
IE
USB Host Controller (USBH)
Initial
Value
0
0
0
R/W
R/W
R/W
R/W
Description
Bulk List Enable
This bit is set to enable the processing of the bulk list in
the next frame. When this bit is cleared by HCD, the
processing of the bulk list is not carried out after next SOF.
The host controller checks this bit when processing this
list. When disabling, HCD can correct the list. When
USBHBCED indicates ED to be deleted, HCD should
hasten the pointer by updating USBHBCED before re-
enabling the list processing.
0: Bulk list processing is not carried out
1: Bulk list processing is carried out
Control List Enable
This bit is set to enable the processing of the control list in
the next frame. If cleared by HCD, the processing of the
control list is not carried out after next SOF. The host
controller must check this bit whenever the list will be
processed. When disabling, HCD can correct the list.
When USBHCCED indicates ED to be deleted, HCD
should hasten the pointer by updating USBHCCED before
re-enabling the list processing.
0: Control list processing is not carried out
1: Control list processing is carried out
Isochronous Enable
This bit is used by HCD to enable/disable the processing
of isochronous ED. While processing the periodic list, HC
will check the status of this bit when it finds an
isochronous ED (F =1). If set (enabled), the host controller
continues to process ED. If cleared (disabled), the host
controller stops the processing of the periodic list
(currently includes only isochronous ED) and starts to
process the bulk/control list. Setting this bit is guaranteed
to be valid in the next frame (not in the current frame).
0: Processes isochronous ED
1: Processes the bulk/control list