EP80579 Datasheet, PDF (1036/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
• Implemented for a specific port on the host controller
• Operational anytime the port is not suspended AND the host controller is in D0
power state.
• Capability is interrupted when port is driving USB RESET
26.13.2
Warning:
Note:
Debug Port Register Details
The Debug port’s registers are located in the same memory range as the standard EHCI
registers, which are defined by the Base Address Register (BAR). The base offset for
these registers (A0h) is declared in the Debug Port Base Offset Capability Register at
Configuration offset 5Ah. The specific EHCI port that supports this debug capability is
indicated by a four-bit field (bits 20-23) in the HCSPARAMS register of an EHCI
controller.
Behavioral Rules:
1. All of these registers are implemented in the core well and reset by EHC HCRESET,
EHC D3-to-D0 state transition, and PLTRST#.
2. The hardware associated with this register provides no checks to ensure that
software programs the interface correctly. How the hardware behaves when
programmed illegally is undefined.
The default values are defined with an h for hex, a b for binary, or 00 for zero. If there
is not a letter following the default value, assume it is a binary number.
Address locations that are not listed are considered reserved register locations. Reads
to reserved registers may return non-zero values. Writes to reserved locations may
cause system failure.
Reserved bits are Read Only.
26.13.2.1 Offset A0h: CNTL_STS - Control/Status Register
Software must do Read-Modify-Write operations to this register to preserve the
contents of bits not being modified. This include Reserved bits.
In order to preserve the usage of RESERVED bits in the future, software must always
write the same value read from the bit until it is defined. Reserved bits will always
return 0 when read.
Intel^® EP80579 Integrated Processor Product Line Datasheet
1036
August 2009
Order Number: 320066-003US