NH82801HBM S LB9A Intel, NH82801HBM S LB9A Datasheet - Page 746

• Manufacturer Part Number: NH82801HBM S LB9A
• Description: CONTROLLER HUB, ICH8M, I/O, 82801HBM
• Manufacturer: Intel

Specifications of NH82801HBM S LB9A

• Power Dissipation Pd: 2.4W
• Digital Ic Case Style: BGA
• No. Of Pins: 676
• Pci Bus Type: I/O Controller Hub
• Pci Express Base Spec: PCIe 1.1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.1.6
746
TIMn_COMP—Timer n Comparator Value Register
Address Offset: Timer 0:
Attribute:
Default Value:
63:0
Bit
Timer Compare Value — R/W. Reads to this register return the current value of the
comparator
Timers 0, 1, or 2 are configured to non-periodic mode:
Writes to this register load the value against which the main counter should be
compared for this timer.
Timer 0 is configured to periodic mode:
Default value for each timer is all 1s for the bits that are implemented. For example,
a 32-bit timer has a default value of 00000000FFFFFFFFh. A 64-bit timer has a
default value of FFFFFFFFFFFFFFFFh.
• As each periodic interrupt occurs, the value in this register will increment. When
• When the main counter equals the value last written to this register, the corresponding
• The value in this register does not change based on the interrupt being generated.
• When the main counter equals the value last written to this register, the corresponding
• A
interrupt can be generated (if so enabled).
interrupt can be generated (if so enabled).
is increased by the value last written to the register.
For example, if the value written to the register is 00000123h, then
1. An interrupt will be generated when the main counter reaches 00000123h.
2. The value in this register will then be adjusted by the hardware to 00000246h.
3. Another interrupt will be generated when the main counter reaches 00000246h
4. The value in this register will then be adjusted by the hardware to 00000369h
the incremented value is greater than the maximum value possible for this
register (FFFFFFFFh for a 32-bit timer or FFFFFFFFFFFFFFFFh for a 64-bit timer),
the value will wrap around through 0. For example, if the current value in a 32-bit
timer is FFFF0000h and the last value written to this register is 20000, then after
the next interrupt the value will change to 00010000h
fter the main counter equals the value in this register, the value in this register
Timer 1:
Timer 2:
R/W
N/A
108h–10Fh,
128h–12Fh,
148h–14Fh
§ §
Description
Size:
High Precision Event Timer Registers
64 bit
Intel
®
ICH8 Family Datasheet