Intel E3815 FH8065301567411 Datenbogen
Produktcode
FH8065301567411
Intel
®
Atom™ Processor E3800 Product Family
Datasheet
2375
23:16
08h
RW
Interrupt Threshold Control (ITC_0): This field is used by system
software to select the maximum rate at which the host controller will issue
interrupts. The only valid values are defined below. If software writes an
invalid value to this register, the results are undefined. Value Maximum
Interrupt Interval 00h Reserved 01h 1 micro-frame 02h 2 micro-frames 04h
4 micro-frames 08h 8 micro-frames (default, equates to 1 ms) 10h 16 micro-
frames (2 ms) 20h 32 micro-frames (4 ms) 40h 64 micro-frames (8 ms)
Refer to Section 4 in the EHCI specification for interrupts affected by this
field.
software to select the maximum rate at which the host controller will issue
interrupts. The only valid values are defined below. If software writes an
invalid value to this register, the results are undefined. Value Maximum
Interrupt Interval 00h Reserved 01h 1 micro-frame 02h 2 micro-frames 04h
4 micro-frames 08h 8 micro-frames (default, equates to 1 ms) 10h 16 micro-
frames (2 ms) 20h 32 micro-frames (4 ms) 40h 64 micro-frames (8 ms)
Refer to Section 4 in the EHCI specification for interrupts affected by this
field.
Power Well: Core
15:14
00b
RO
Reserved (RSVD): Reserved.
13
0b
RO
Reserved (RSVD): Reserved.
12
0h
RO
Reserved (RSVD): Reserved.
11:8
0h
RO
Unimplemented Asynchronous Park Mode Bits (UAPMB_0): This field
is hardwired to 000b because the host controller does not support this
optional feature.
is hardwired to 000b because the host controller does not support this
optional feature.
Power Well: Core
7
0b
RO
Light Host Controller Reset (LHCR_0): Read Only 0b. The Intel EHC does
not implement this optional reset and hardwires this bit to 0.
not implement this optional reset and hardwires this bit to 0.
Power Well: Core
6
0b
RW
Interrupt on Async Advance Doorbell (IAAD_0): This bit is used as a
doorbell by software to tell the host controller to issue an interrupt the next
time it advances asynchronous schedule. Software must write a 1 to this bit
to ring the doorbell. When the host controller has evicted all appropriate
cached schedule state , it sets the Interrupt on Async Advance status bit in
the USBSTS register. If the Interrupt on Async Advance Enable bit in the
USBINTR register is a one then the host controller will assert an interrupt at
the next interrupt threshold. See the EHCI specification for operational
details. The host controller sets this bit to a zero after it has set the Interrupt
on Async Advance status bit in the USBSTS register to a one. Software
should not write a one to this bit when the asynchronous schedule is
disabled. Doing so will yield undefined results.
doorbell by software to tell the host controller to issue an interrupt the next
time it advances asynchronous schedule. Software must write a 1 to this bit
to ring the doorbell. When the host controller has evicted all appropriate
cached schedule state , it sets the Interrupt on Async Advance status bit in
the USBSTS register. If the Interrupt on Async Advance Enable bit in the
USBINTR register is a one then the host controller will assert an interrupt at
the next interrupt threshold. See the EHCI specification for operational
details. The host controller sets this bit to a zero after it has set the Interrupt
on Async Advance status bit in the USBSTS register to a one. Software
should not write a one to this bit when the asynchronous schedule is
disabled. Doing so will yield undefined results.
Power Well: Core
5
0b
RW
Asynchronous Schedule Enable (ASE_0): This bit controls whether the
host controller skips processing the Asynchronous Schedule. Values mean:
0b Do not process the Asynchronous Schedule 1b Use the ASYNCLISTADDR
register to access the Asynchronous Schedule.
host controller skips processing the Asynchronous Schedule. Values mean:
0b Do not process the Asynchronous Schedule 1b Use the ASYNCLISTADDR
register to access the Asynchronous Schedule.
Power Well: Core
Bit
Range
Default
& Access
Field Name (ID): Description