EP80579 Datasheet, PDF (1446/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
37.6.2.5 EEPROM_CTRL – EEPROM Control Register
Table 37-29. EEPROM_CTRL - EEPROM Control Register (Sheet 1 of 2)
Description:
View: PCI 1
BAR: CSRBAR
Bus:Device:Function: M:0:0
Offset Start: 0010h
Offset End: 0013h
View: PCI 2
BAR: CSRBAR
Bus:Device:Function: M:1:0
Offset Start: 0010h
Offset End: 0013h
View: PCI 3
BAR: CSRBAR
Bus:Device:Function: M:2:0
Offset Start: 0010h
Offset End: 0013h
Size: 32 bits
Default: 00000X1Xh
GbE0: Aux
Power Well: Gbe1/2:
Core
Bit Range
31 : 10
09
Bit Acronym
Bit Description
Sticky
RSVD
EE_SIZE
Reserved
EEPROM Size.
0 Reserved
1 4096-bit (256 word) NM93C66 compatible EEPROM
If an EEPROM is present, this bit indicates its size, based
on acknowledges seen during EEPROM scans of different
addresses.
This bit is read-only.
NOTE: this bit will not be updated as a result of anything
but a power up reset.
Bit Reset
Value
0h
Xh
Bit Access
RO
RO
08
07
06
05 : 04
03
EE_PRES
EE_GNT
EE_REQ
RSVD
EE_DO
EEPROM Present
This bit attempts to indicate if an EEPROM is present by
monitoring the EE_DO input for a active-low
“acknowledge” by the serial EEPROM during initial EEPROM
scan. If no EEPROM is present, the EE_DO line will remain
pulled-high and thus no acknowledge will be seen.
1=EEPROM present;
0=no EEPROM.
NOTE: this bit will not be set except as a result of EEPROM
detection during power up reset.
Grant EEPROM Access
When this bit is 1 the software can access the EEPROM
using the SK, CS, DI, and DO bits.
Request EEPROM Access
The software must write a 1 to this bit to get direct
EEPROM access. It has access when EE_GNT is 1. When
the software completes the access it must write a 0.
Reserved
Data Output Bit from the EEPROM.
The EE_DO input signal is mapped directly to this bit in the
register and contains the EEPROM data output. This bit is
read-only from the software perspective – writes to this bit
have no effect.
Xh
RO
0h
RO
0h
RW
01h
RO
X
RO
Intel^® EP80579 Integrated Processor Product Line Datasheet
1446
August 2009
Order Number: 320066-003US