HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 579

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

Bit
17
16
15 to 10 —
9
Bit Name
PESC
CSC
LSDA
Initial
Value
0
0
All 0
0
R/W
R/W
R/W
R
R/W
Description
Port Enable Status Change
This bit is set when the PES bit is cleared due to a
hardware event. This bit is not set by the change of
writing of the host controller driver. Writing 1 by the host
controller driver clears this bit. When this bit is written to
0, this bit is not cleared.
0: Port Enable Status has not changed.
1: Port Enable Status has changed.
Connect Status Change
This bit is set whenever the connection or disconnection
event occurs. Writing 1 by the host controller driver clears
this bit. When this bit is written to 0, this bit is not cleared.
If the CCS bit is cleared when Set Port Reset, Set Port
Enable, or Set Port Suspend is written to, writing when
the power supply of the port is disconnected does not
occur, so this bit is set to report the driver to re-evaluate
the connection status.
Note: If the DR bit in the HcRhDescriptorB register is set,
this bit is set only after the root hub reset to report the
system that a device can be attached.
0: Current Connect Status has not changed.
1: Current Connect Status has changed.
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.
(Read) Low Speed Device Attached
This bit indicates the speed of the device attached to this
port. When this bit is set, a low-speed device is attached
to this port. When this bit is cleared, a full-speed device is
attached to this port. This bit is valid only when the CCS
bit is set.
0: A full-speed device is attached.
1: A low-speed device is attached.
(Write) Clear Port Power
Writing 1 by the host controller driver clears the PPS bit.
When this bit is written to 0, this bit is not cleared.
Rev. 1.00, 02/04, page 541 of 804