HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 553

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Note:
Bit
2
1
0
*
Bit Name
PLE
CBSR1
CBSR0
ED is Endpoint Descriptor.
Initial
Value
0
0
0
R/W
R/W
R/W
R/W
Description
Periodic List Enable
This bit is set to enable the processing of the periodic list
in the next frame. If cleared by the host controller driver,
no periodic list processing is carried out after next SOF.
The host controller must check this bit before the host
controller starts to process the list.
0: The periodic list processing is not carried out after next
1: The periodic list processing is carried out after next
Control Bulk Service Ratio
This bit specifies the service ratio of the control and bulk
ED. The host controller must compare the ratio specified
by the internal calculation whether it has processed
control ED in determining whether another control ED is
continued to be supplied or switched to bulk ED before
any periodic list is processed. The internal calculation is
retained when the frame boundary is exceeded. In case
of reset, the host controller driver is responsible for
restoring this value.
00: 1:1
01: 2:1
10: 3:1
11: 4:1
SOF.
SOF.
Rev. 1.00, 02/04, page 515 of 804