H/W Monitor for Desktop & Server

Part No. W83795G
Datasheet  W83795G_W83795ADG.pdf
Description W83795G is an evolving version of the Nuvoton popular Hardware Monitor IC family. 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. A 10-bit analog-to-digital converter (ADC) is built inside W83795G. W83795G can simultaneously 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.

W83795G provides 8 PWM (pulse width modulation) / DC fan output modes for SMART FAN™ control - } Thermal Cruise™ ~ mode and } SMART FAN™ IV ~ mode. Under } Thermal Cruise™ ~ mode, temperatures of CPU and the system can be maintained within specific programmable ranges under the hardware control. As for SMART FAN™ IV, which provides 8 sets of temperatures setting point each could control fan's duty 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 2C interface at the same time.

W83795G can uniquely serve as an ASF sensor to respond to ASF master's request for the 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. The operation voltage of W83795G is 3.3V and the package is 64-pin LQFP.
Features
  • Support up to 21 voltage sensing inputs
  • Support 6 temperature sensor inputs; four of them support current mode temperature measurement method, two of them support thermistor mode temperature measurement method
  • Support up to 14 fan tachometer input
  • Support 8 fan speed control output; provide PWM/DC fan control mode; support Nuvoton SMART FAN™ control – “Thermal Cruise™” mode and “SMART FAN™ IV” mode
  • Support parallel VID input and serial VID (AMD™) input monitoring
  • Support CASEOPEN detection; SMI#, OVT#, VOLT_FAULT#, FAN_FAULT# alarm event
  • Support PECI 2.0 Specification for 8 CPU Address and 2 domains per CPU address
  • Support AMD™ SB-TSI Specification
  • Support ASF2.0 specification; Provide up to 8 GPIO pins
  • 3.3V operation voltage; I²C interface
Diagram N/A
Package LQFP, 64-pin
Other Files N/A
Development Tools N/A
Others N/A

Contact us: ComputerIC@nuvoton.com