FW82801EB Intel, FW82801EB Datasheet - Page 403

• Manufacturer Part Number: FW82801EB
• Manufacturer: Intel

Specifications of FW82801EB

• Lead Free Status / RoHS Status: Not Compliant

9.11
9.11.1
Intel
®
Table 152. TCO I/O Register Address Map
82801EB ICH5 / 82801ER ICH5R Datasheet
System Management TCO Registers (D31:F0)
The TCO logic is accessed via registers mapped to the PCI configuration space
(Device 31:Function 0) and the system I/O space. For TCO PCI Configuration registers, see LPC
Device 31:Function 0 PCI Configuration registers.
The TCO I/O registers reside in a 32-byte range pointed to by a TCOBASE value, which is,
ACPIBASE + 60h in the PCI config space. The following table shows the mapping of the registers
within that 32-byte range. Each register is described in the following sections.
TCO_RLD—TCO Timer Reload and Current Value Register
I/O Address:
Default Value:
Lockable:
0Ch–0Dh
0Ah–0Bh
04h–05h
06h–07h
08h–09h
11h–1Fh
Bit
7:0
Offset
0Eh
00h
01h
02h
03h
0Fh
10h
TCO Timer Value — R/W. Reading this register will return the current count of the TCO timer.
Writing any value to this register will reload the timer to prevent the timeout. Bits 7:6 will always be 0.
TCO_MESSAGE1,
TCO_MESSAGE2
TCO_DAT_OUT
SW_IRQ_GEN
TCO_WDSTS
TCO_DAT_IN
TCO1_CNT
TCO2_CNT
TCO1_STS
TCO2_STS
Mnemonic
TCO_TMR
TCO_RLD
TCOBASE +00h
00h
No
—
—
TCO Timer Reload and Current Value
TCO Timer Initial Value
TCO Data In
TCO Data Out
TCO1 Status
TCO2 Status
TCO1 Control
TCO2 Control
TCO Message 1 and 2
Reserved
Software IRQ Generation Register
Reserved
Watchdog Status Register
Register Name
Description
LPC Interface Bridge Registers (D31:F0)
Attribute:
Size:
Power Well:
R/W
8-bit
Core
Default
0000h
0000h
0000h
0008h
04h
00h
00h
00h
00h
00h
11h
—
—
R/W (special),
R/W, R/WC
R/WC, RO
R/WC
Type
R/W,
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
—
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