EP80579 Datasheet, PDF (1325/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Table 35-159 defines the behavior of the ADDR field in MMBAR along with the resulting
number of devices (chip selects) that the LEB supports for the configuration. The device
count depends on the 16/32MB mode that the EXP_TIMING_CS[0-7] registers in the
LEB controller select (refer to Section 42.5.1.1, “EXP_TIMING_CS0 - Expansion Bus
Timing Register” and Section 42.5.1.2, “EXP_TIMING_CS[1-7] - Expansion Bus Timing
Registers”). Specifically, the LEB is in 32MB mode if bit 9 (this bit is in the CNFG_4_0
field) in any of these registers is set, otherwise it is in 16MB mode.
Table 35-159 defines the behavior of the ADDR field in MMBAR.
Table 35-159.MMBAR ADDR Field Behavior
LEBSIZE
ADDR Field
BAR Size
Number of LEB Devices
Supported^a
RW Bits
RO Zero Bits
16MB Mode
32MB Mode
0
None
31:25
Zero
None
None
1
31:25
None
32 MB
2
1
2
31:26
25
64 MB
4
2
3
31:27
26:25
128 MB
8
4
4
31:28
27:25
256 MB
8
8
a. The number of LEB devices supported depends on the device mode (16MB or 32MB) mode selected of the
EXP_TIMING_CS[0-7] registers in the LEB controller.
35.12.1.10 Offset 2Ch: SVID – Subsystem Vendor ID Register
This register is a write-once register. Once any byte in the register has been written,
the register locks against further writes until reset.
Table 35-160.Offset 2Ch: SVID: Subsystem Vendor ID Register
Description:
View: PCI
BAR: Configuration
Bus:Device:Function: M:8:0
Offset Start: 2Ch
Offset End: 2Dh
Size: 16 bit
Default: 0000h
Power Well: Core
Bit Range
15 : 00
Bit Acronym
Bit Description
Sticky
SVID
Subsystem Vendor ID: This field must be programmed
during BIOS initialization.
Bit Reset
Value
0h
Bit Access
RWO
35.12.1.11 Offset 2Eh: SID – Subsystem ID Register
This register is a write-once register. Once any byte in the register has been written,
the register locks against further writes until reset.
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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