307013-003 Datasheet, PDF (331/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

LAN Controller Registers (B1:D8:F0) (Desktop and Mobile Only)
8.3.3
ASF_CNTL—ASF Control Register
(LAN Controller—B1:D8:F0)
Offset Address: E2h
Default Value: 00h
Attribute:
Size:
R/W, RO
8 bits
This register contains enables for special modes and SOS events. CTL_PWRLS should
be set if ASF should be expecting a power loss due to software action. Otherwise, an
EEPROM reload will happen when the power is lost.
Bit
Description
SMBus Hang SOS Enable (CTL_SMBHG) — R/W.
7 _{0 = Disable}
1 = Enables SMBus Hang SOS to be sent.
Watchdog SOS Enable (CTL_WDG) — R/W.
6 _{0 = Disable.}
1 = Enables Watchdog SOS to be sent.
Link Loss SOS Enable (CTL_LINK) — R/W.
5 0 = Disable.
1 = Enables Link Loss SOS to be sent.
OS Hung Status (CTL_OSHUNG) — RO.
4
1 = This bit will be set to 1 when ASF has detected a Watchdog Expiration.
NOTE: This condition is only clearable by a PCI RST# assertion (system reset).
Power-Up SOS Enable (CTL_PWRUP) — R/W.
3 0 = Disable.
1 = Enables Power-Up SOS to be sent.
2 Reserved
Receive ARP Enable (CTL_RXARP) — R/W. The LAN controller interface provides a
mode where all packets can be requested.
0 = Disable.
1
1 = Enable. ASF requests all packets when doing a Receive Enable. This is necessary in
LAN controller to get ARP packets.
NOTE: Changes to this bit will not take effect until the next Receive Enable command
to the LAN.
Power Loss OK (CTL_PWRLS) — R/W.
0 _{0 = Power Loss will reload EEPROM}
1 = Power Loss will not reload EEPROM
Intel ^® ICH7 Family Datasheet
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