w83795g Winbond Electronics Corp America, w83795g Datasheet - Page 4

• Manufacturer Part Number: w83795g
• Description: Nuvoton H/w Monitor
• Manufacturer: Winbond Electronics Corp America

1. GENERAL DESCRIPTION (W83795G)
provides several innovative features, such as ASF 2.0 compliant specification, SMBus 2.0 ARP
compatible command, Intel PECI2.0 interface, AMD SB-TSI interface, PROCESSOR HOT, parallel VID
input, and serial VID input. Conventionally, W83795G can be used to monitor several critical hardware
parameters of the system, including power supply voltages, fan speeds, and temperatures, which are
very important for a high-end computer system, such as server, workstation…etc, to work stably and
efficiently.
monitor 15 (up to 21) analog voltage inputs (including power VDD / 3VSB / VBAT / VTT monitoring), 8
(up to 14) fan tachometer inputs, 8 fan output control, 6 remote temperature sensor inputs, 4 of which
support current mode (dual current source) temperature measurement method, caseopen detection,
Watch Dog Timer function, and GPIO pins. The sense of remote temperature can be performed by
thermistors, or directly from Intel® / AMD
(pulse width modulation) / DC fan output modes for S
and
system can be maintained within specific programmable ranges under the hardware control. As for
S
cycle, depends on this construction, fan could be operated at the lowest possible speed so that the
acoustic noise could be balanced. As for warning mechanism, W83795G provides SMI#, OVT#,
VOLT_FAULT#, FAN_FAULT#, and BEEP signals to protect the system. W83795G has 2 specific pins
to provide address selection so that 4 W83795G could be wired through I
implementation of network management in OS-absent status. Through W83795G’s compliance with
ASF2.0 sensor specification, network server is able to monitor the environmental status of each client
in OS-absent state by PET (Platform Event Trap) frame values returned from W83795G, such as
temperatures, voltages, fan speed and case open. Moreover, W83795G supports SMBus 2.0 ARP
command to solve the problem of address conflicts by dynamically assigning a new unique address for
W83795G ASF Function after W83795G’s UDID is sent.
system from time to time. A pop-up warning can also be activated when the monitored item is out of the
proper/preset range. The application software could be Nuvoton's Hardware Doctor
management application software. Besides, the users can set up the upper and lower limits (alarm
thresholds) of these monitored parameters and activate corresponding maskable interrupts.
MART
W83795G is an evolving version of the Nuvoton popular Hardware Monitor IC family. W83795G
A 10-bit analog-to-digital converter (ADC) is built inside W83795G. W83795G can simultaneously
W83795G can uniquely serve as an ASF sensor to respond to ASF master’s request for the
Through the application software or BIOS, the users can read all the monitored parameters of the
S
F
MART
AN
TM
F
IV, which provides 8 sets of temperatures setting point each could control fan’s duty
AN
TM
IV
mode. Under
TM
CPU with thermal diode output. W83795G provides 8 PWM
Thermal Cruise
- 4 –
MART
F
TM
AN
TM
mode, temperatures of CPU and the
control -
2
C interface at the same time.
W83795G/ADG
Thermal Cruise
Revision 1.41
TM
Aug/2/2010
TM
or other
mode