Texas Instruments OMAP5912 Reference Manual page 1342

USB Host Controller
Table 23. HC Port 1 Status and Control Register (HCRHPORTSTATUS1)
(Continued)
Bit Name
2 PSS/SPS
1 PES/SPE
0 CCS/CPE
50 Universal Serial Bus (USB)
Description
Port 1 port suspend status/set port suspend
When read as 1, indicates that port 1 is in the USB suspend
state or is in the resume sequence. When 0, indicates that
port 1 is not in the USB suspend state. This bit is cleared
automatically at the end of the USB resume sequence and
also at the end of the USB reset sequence.
If port 1 current connect status is 1, a write of 1 to this bit sets
the port 1 port suspend status bit and places port 1 in USB
suspend state. If current connect status is 0, a write of 1
instead sets connect status change to inform the USB host
controller driver software of an attempt to suspend a
disconnected device. A write of 0 to this bit has no effect.
Port 1 port enable status/set port enable
When read as 1, indicates that port 1 is enabled. When read
as 0, this bit indicates that port 1 is not enabled. This bit is
automatically set at completion of port 1 USB reset if it was
not already set before the USB reset completed, and is
automatically set at the end of a USB suspend if the port was
not enabled when the USB resume completed.
A write of 1 to this bit when port 1 current connect status is 1
sets the port 1 port enable status bit. A write of 1 when port 1
current connect status is 0 has no effect. A write of 0 has no
effect.
Port 1 current connection status/clear port enable
When read as 1, indicates that port 1 currently has a USB
device attached. When 0, indicates that no USB device is
attached to port 1.
This bit is set to 1 after root hub reset if the
HCRHDESCRIPTORB.DR[1] bit is set to indicate a
non-removable device on port 1.
A write of 1 to this bit clears the port 1 port enable bit. A write
of 0 to this bit has no effect.
The HC port 2 status register reports and controls the state of USB host port
2. Depending on HMC_MODE (see Table 23) value, HCRHPORTSTATUS1
can provide status and control for the host controller port that is usually
associated with the following OMAP5912 pins:
Type Reset
R/W 0
R/W 0
R/W 0
SPRU761A