W83791D Datasheet, PDF (23/46 Pages) Winbond – W83791D Winbond H/W Monitoring IC

W83791D
Preliminary
6.5 ASF(Alert Standard Format) Introduction
In order to implement network management in OS-absent, W83791D provides ASF Response Registers to
meet ASF sensor spec. As a result, the network server is able to monitor several environmental status of the client in
OS-absent by PET frame values returned from W83791D, including temperature, voltage, fan speed, and case open.
In below is the ASF diagram:
Alert Message
LAN on Card
Management
Server
LAN on
Board
Polling
PCI Bus
(PET Subset)
Motherboard
SMBus
Chipset
791D
Slave
Figure 6. ASF Block Diagram
6.5.1
Platform Event Trap (PET)
PET is the ASF transmit protocol used to provide common fields for trap regardless of trap source. The
variable bindings fields in a PET frame contain the system and sensor information for an event, such as event sensor
type, event type, event offset, event source type, sensor device, sensor number, entity ID, entity instance, event
status index, event status, and event severity. Each field has its definition and is described in the following table.
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Publication Release Date: Aug, 2001
Revision 0.41