307013-003 Datasheet, PDF (117/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

Functional Description
5.4.2
Note:
5.4.2.1
5.4.2.2
5.4.2.3
5.4.2.4
5.4.2.5
• ASF Compliance
— Compliant with the Alert Standard Format (ASF) Specification, Version 1.03
- PET Compliant Packets
- RMCP
- Legacy Sensor Polling
- ASF Sensor Polling
- Remote Control Sensor Support
• Advanced Features / Miscellaneous
— SMBus 2.0 compliant
— Optional reset extension logic (for use with a power-on reset)
ASF Hardware Support
ASF requires additional hardware to make a complete solution.
If an ASF compatible device is externally connected and properly configured, the
internal ICH7 ASF controller will be disabled. The external ASF device will have access
to the SMBus controller.
Intel^® 82562EM/EX
The 82562EM/EX Ethernet LAN controller is necessary. This LAN controller provides the
means of transmitting and receiving data on the network, as well as adding the
Ethernet CRC to the data from the ASF.
EEPROM (256x16, 1 MHz)
To support the ICH7 ASF solution, a larger, 256x16 1 MHz, EEPROM is necessary to
configure defaults on reset and on hard power losses (software un-initiated). The ASF
controller shares this EEPROM with the LAN controller and provides a pass through
interface to achieve this. The ASF controller expects to have exclusive access to words
40h through F7h. The LAN controller can use the other EEPROM words. The ASF
controller will default to safe defaults if the EEPROM is not present or not configured
properly (both cause an invalid CRC).
Legacy Sensor SMBus Devices
The ASF controller is capable of monitoring up to eight sensor devices on the main
SMBus. These sensors are expected to be compliant with the Legacy Sensor
Characteristics defined in the Alert Standard Format (ASF) Specification, Version 1.03.
Remote Control SMBus Devices
The ASF controller is capable of causing remote control actions to Remote Control
devices via SMBus. These remote control actions include Power-Up, Power-Down,
Power-Cycle, and Reset. The ASF controller supports devices that conform to the Alert
Standard Format (ASF) Specification, Version 1.03, Remote Control Devices.
ASF Sensor SMBus Devices
The ASF controller is capable of monitoring up to 128 ASF sensor devices on the main
SMBus. However, ASF is restricted by the number of total events which may reduce the
number of SMBus devices supported. The maximum number of events supported by
ASF is 128. The ASF sensors are expected to operate as defined in the Alert Standard
Format (ASF) Specification, Version 1.03.
Intel ^® ICH7 Family Datasheet
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