HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 557

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

Bit
31
30
29 to 7 —
6
5
4
Bit Name
—
OC
RHSC
FNO
UE
Initial
Value
0
0
All 0
0
0
0
R/W
R
R/W
R
R/W
R/W
R/W
Description
Reserved
This bit is always read as 0. The write value should
always be 0. The operation is not guaranteed if 1 is
written to this bit.
Ownership Change
This bit is set when the OCR bit in the
HcCommandStatus register is set by the host controller
driver. This event generates a system management
interrupt (SMI) at once when not masked. When there is
no SMI pin, this bit is cleared to 0.
0: The OCR bit in the HcCommandStatus register is not
1: The OCR bit in the HcCommandStatus register is set.
Reserved
These bits are always read as 0. The write value should
always be 0. The operation is not guaranteed if 1 is
written to these bits.
Root Hub Status Change
This bit is set when the content of the HcRhStatus
register or the content of any HcRhPortStatus register
[Number of Downstream Port] has changed.
0: The content of the HcRhStatus register or
1: The content of the HcRhStatus register or
Frame Number Overflow
This bit is set when MSB (bit 15) in the HcFmNumber
register changes value from 0 to 1 or from 1 to 0 or after
HccaFrameNumber is updated.
0: MSB in the HcFmNumber register or
1: MSB in the HcFmNumber register or
Unrecoverable Error
This bit is set when the host controller detects a system
error that is not related to USB. The host controller driver
clears this bit after the host controller is reset.
0: System error has not generated yet.
1: System error is detected.
set.
HcRhPortStatus register is not changed.
HccaFrameNumber is not updated.
HcRhPortStatus register is changed.
HccaFrameNumber is updated.
Rev. 1.00, 02/04, page 519 of 804