HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 582

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

Rev. 1.00, 02/04, page 544 of 804
Bit
2
1
Bit Name
PSS
PES
Initial
Value
0
0
R/W
R/W
R/W
Description
(Read) Port Suspend Status
This bit indicates that the port is under the process to
suspend or during the resume sequence. Writing Set
Suspend State sets this bit and setting the PSSC bit
clears this bit at the end of the resume interval. If the
CCS bit is cleared, this bit cannot be set. When the
PRSC bit is set upon completion of the port reset or the
host controller is placed in the USB resume state, this bit
is cleared. If an upstream resume is in progress, it is
transmitted to the host controller.
0: Port is not suspended.
1: Port is suspended.
(Write) Set Port Suspend
Writing 1 by the host controller driver sets the PSS bit.
When this bit is written to 0, this bit is not set. In addition,
when the CCS bit is cleared, the PSS bit is not set by this
writing. Instead, the CSC bit is set. This reports the
suspended state of the disconnection port to the driver.
(Read) Port Enable Status
This bit indicates whether the port is enabled or disabled.
The root hub clears this bit when the overcurrent
condition and an operational bus error such as
disconnect event, power-off switch, or babble are
detected. The PESC bit is set by this change. This bit is
set by writing Set Port Enable and cleared by writing
Clear Port Enable. This bit cannot be set when the CCS
bit is cleared. In addition, this bit is set upon completion of
the port reset by which the PRSC bit is set, or upon
completion of the port suspend by which the PSSC bit is
set.
0: Port disabled.
1: Port enabled.
(Write) Set Port Enable
Writing 1 by the host controller driver sets the PES bit.
When this bit is written to 0, this bit is not set. If the CCS
bit is cleared, this writing does not set the PES bit,
instead, sets the CSC bit. This reports the driver that the
disconnection port has been tried to be enabled.