W83791G Nuvoton Technology Corporation of America, W83791G Datasheet - Page 23

• Manufacturer Part Number: W83791G
• Description: IC MONITOR H/W 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83791G

• Function: Hardware Monitor
• Topology: ADC
• Sensor Type: External
• Sensing Temperature: External Sensor
• Output Type: I²C™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.5
In order to implement network management in OS-absent, W83791D/G 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/G,
including temperature, voltage, fan speed, and case open. In below is the ASF diagram:
6.5.1
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.
Event Sensor Type
Event Type
Event Offset
Event source Type
M
M
a
a
n
n
S
S
PET VARIABLE BINDING FIELD
ASF (Alert Standard Format) Introduction
a
a
e
e
Platform Event Trap (PET)
g
g
r
r
v
e
v
e
e
e
m
m
r
r
e
e
n
n
t
t
Alert Message
LAN on Board
Figure 6. ASF Block Diagram
The Event Sensor Type field indicates what types of
events the sensor is monitoring. E.g. temperature,
voltage, fan, etc.
The Event Type indicates what type of transition/state
change triggered the trap.
The Event Offset indicates which particular event
occurred for a given Even Type.
The Event Source Type describes the originator of the
event. It is ASF1.0 (68h) for all PET frames defined by
this specification.
P
P
C
C
I
I
- 17 -
B
B
Polling
u
u
LAN on Card
s
s
C
S
C
S
M
M
h
h
i
i
B
B
p
p
s
u
s
u
e
e
s
s
t
t
Publication Release Date: April 14, 2006
DESCRIPTION
(PET Subset)
791D
Slave
W83791D/G
M
M
o
o
t
t
h
h
Revision 1.1
e
e
r
r
b
b
o
o
a
a
r
r
d
d