Intel C2550 FH8065401488912 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 2 of 3

Order Number: 330061-002US

449

The types of resets are:

1. Host Reset Without Power Cycle (Warm Reset)

a. The host-only functionality in the SoC gets reset. Any functionality that needs to 

remain operational during a host reset must not get reset in this case. The SoC 

is allowed to drop this type of reset request if received while the system is in S5.

2. Host Reset With Power Cycle (Cold Reset)

a. The host-only functionality in the SoC gets reset. Any functionality that needs to 

remain operational during a host reset must not get reset in this case. The host 

system automatically is powered back up and brought out of reset. The SoC 

must not drop this type of reset request if received while the system is in a 

software-entered S5 state. If the system is in S5 due to a reset type #5 event, 

the SoC is allowed to drop this type of reset request.

3. Sx Entry and Host Stays There (Power-Down to S5 Soft Off)

a. Any functionality that needs to remain operational or retain status during a host-

sleep state must not get reset in this case. In this case, the host does not 

automatically power back up.

4. Global, Power Cycle Reset

a. The hardware entity is not dependent on the firmware (note that the firmware 

may initiate the reset). All SoC functionality should get reset, except the:

— RTC power well backed information.
— Suspend well status, configuration, and functional logic for controlling and 

reporting this reset.

b. The host powers back up after the power cycle period.

5. Straight to S5 and the Host Stays There

a. All power wells that are controlled by the PMU_SLP_S45_B pins are turned off.
b. All SoC functionality is reset, except the:

— RTC power well backed information.
— Suspend well status, configuration, and functional logic for controlling and 

reporting this reset.