Intel 6 SERIES CHIPSET - DATASHEET 01-2011 User Manual

Datasheet 181
Functional Description
NOTES:
1. Trigger will result in Global Reset with power cycle if the acknowledge message is not
received by the PCH.
2. The PCH does not send warning message to processor, reset occurs without delay.
3. The PCH waits for enabled wake event to complete reset.
4. The PCH allowed to drop this type of reset request if received while the system is in S3/S4/
S5.
The PCH must not drop this type of reset request if received while system is in a
software-entered S3/S4/S5 state. However, the PCH is allowed to perform the reset
without executing the RESET_WARN protocol in these states.
Table 5-39. Causes of Host and Global Resets
Trigger
Host Reset
without
Power Cycle
Host Reset
with Power
Cycle
Global Reset
with Power
Cycle
Write of 0Eh to CF9h Register when Global Reset Bit=0b No Yes No (Note 1)
Write of 06h to CF9h Register when Global Reset Bit=0b Yes No No (Note 1)
Write of 06h or 0Eh to CF9h Register when Global Reset
Bit=1b
No No Yes
SYS_RESET# Asserted and CF9h Bit 3 = 0 Yes No No (Note 1)
SYS_RESET# Asserted and CF9h Bit 3 = 1 No Yes No (Note 1)
SMBus Slave Message received for Reset with Power
Cycle
No Yes No (Note 1)
SMBus Slave Message received for Reset without Power
Cycle
Yes No No (Note 1)
TCO Watchdog Timer reaches zero two times Yes No No (Note 1)
Power Failure: PWROK signal or SYS_PWROK signal
goes inactive or RSMRST# asserts
No No Yes (Note 2)
Special shutdown cycle from processor causes CF9h-
like PLTRST# and CF9h Global Reset Bit = 1
No No Yes
Special shutdown cycle from processor causes CF9h-
like PLTRST# and CF9h Bit 3 = 1
No Yes No (Note 2)
Special shutdown cycle from processor causes CF9h-
like PLTRST# and CF9h Global Reset Bit = 0
Yes No No (Note 1)
Intel
®
Management Engine Triggered Host Reset
without power cycle
Yes No No (Note 1)
Intel Management Engine Triggered Host Reset with
power cycle
No Yes No (Note 1)
Intel Management Engine Triggered Global Reset No No Yes
Intel Management Engine Initiated Host Reset with
power down
No Yes (Note 3) No (Note 1)
PLTRST# Entry Time-out No No Yes
Intel Management Engine Watchdog Timer No Yes (Note 4) No (Note 1)
Power Management Watchdog Timer No Yes (Note 4) No (Note 1)
PROCPWRGD Stuck Low No No Yes

Intel 6 SERIES CHIPSET - DATASHEET 01-2011 Specifications

General

Brand	Intel
Model	6 SERIES CHIPSET - DATASHEET 01-2011
Category	Controller
Language	English