W83795G/ADG Nuvoton H/W Monitor

1 W83795G/ADG Nuvoton H/W Monitor Date: Mar/3/2010 Revision: W83795G/ADG - ii Mar/3/2011 Revision Table of Content- 1. GENERAL DESCRIPTION ( w83795g ) .. 4 2. GENERAL DESCRIPTION (W83795 ADG) .. 5 3. FEATURES ( w83795g ) .. 6 Monitoring Items .. 6 Address Resolution Protocol and Alert Standard Format .. 7 Alarm Output .. 7 General .. 7 7 4. FEATURES (W83795 ADG) .. 8 Monitoring Items .. 8 Address Resolution Protocol and Alert Standard Format .. 9 Alarm Output .. 9 General .. 9 9 5. KEY SPECIFICATIONS .. 10 6. PIN 11 7. PIN DESCRIPTION .. 13 Pin Type Description .. 13 w83795g Pin Description List .. 13 W83795 ADG Pin Description List .. 22 8. REGISTER SUMMARY BANK0 .. 28 ID, Bank Select Registers .. 30 Configuration and Address Select Registers .. 32 Multi-Function Pin Control Registers.

2 34 Watch Dog Timer Registers .. 40 Watch Dog Timer Register Details .. 42 Voltage/Temperature/FANIN Reading Registers .. 43 Voltage Channel Register 44 Fan Register Details .. 48 SMI# Control and Status Registers .. 49 SMI Control/Status Register Map .. 50 OVT and BEEP Control Registers .. 54 BEEP/OVT Control Registers Details .. 55 THERMTRIP and PROCHOT Control Registers .. 59 VID Control and Status Registers .. 66 Voltage/Temperature/FANIN Limitation Registers .. 69 Temperature Sensors Offset Registers .. 78 9. REGISTER SUMMARY BANK1 .. 79 ASF Control Registers .. 79 ASF Register Details .. 84 10. REGISTER SUMMARY BANK2 .. 94 Fan Register Details .. 100 11. PECI CONTROL AND SB-TSI FUNCTION .. 116 W83795G/ADG - iii Mar/3/2011 Revision PECI Control Registers.

3 116 SB Temperature Sensor Interface (SB-TSI) .. 119 12. REGISTER SUMMARY BANK3 .. 121 Digital Temperature Sensor Configuration (DTSC) .. 122 Digital Temperature Sensor Enable (DTSE) .. 122 PECI Control Register (PCR) .. 124 Waiting Available Time for PECI only (WATP) .. 125 PECI Agent Configuration registers (PAC) .. 125 PECI Report Temperature Style registers (PRTS) .. 126 PECI Manual Mode Control Registers (PMMC) .. 127 PECI Agent Tbase Temperature registers (PATB) .. 129 GetDIB Command (GDC).. 130 Agent Characteristic Registers (ACR) .. 130 Agent Relative Temperature Registers (ARTR) .. 132 Agent Tcontrol Temperature Registers (ATTR) .. 134 PCI Configuration Address Registers (PCAR) .. 135 PCI Configuration Write Data (PCWD) .. 136 PCI Configuration Read Data (PCRD) .. 136 MbxSend Command (MSC) .. 137 Completion Code (CC) .. 138 MbxGet Command (MGC) .. 138 Zero FCS Status Register (ZEROFCS) .. 139 SB-TSI Configuration Register (STCR).

4 139 SB-TSI Auto Read Period (STARP) .. 140 SB-TSI Slave Enable (STSE) .. 140 SB-TSI One Shot Start register (STOSS) .. 141 SB-TSI Manual Mode Configuration Registers (STMMCR) .. 141 SB-TSI Read Data (STRD) .. 143 13. ELECTRICAL CHARACTERISTICS .. 144 Absolute Maximum 144 DC Characteristics .. 144 AC Characteristics .. 146 Clock Input Timing .. 146 14. ORDER 147 15. TOP MARKING SPECIFICATIONS .. 148 16. PACKAGE DRAWING AND DIMENSIONS .. 149 17. REVISION 151 W83795G/ADG - 4 Mar/3/2011 Revision 1. GENERAL DESCRIPTION ( w83795g ) w83795g is an evolving version of the Nuvoton popular Hardware Monitor IC family. w83795g provides several innovative features, such as ASF compliant specification, SMBus ARP compatible command, Intel interface, AMD SB-TSI interface, PROCESSOR HOT, parallel VID input, and serial VID input.

5 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, , to work stably and efficiently. 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 / 3 VSB / 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 / AMDTM CPU with thermal diode output. w83795g provides 8 PWM (pulse width modulation) / DC fan output modes for SMART FANTM control - Thermal CruiseTM mode and SMART FANTM IV mode.

6 Under Thermal CruiseTM mode, temperatures of CPU and the system can be maintained within specific programmable ranges under the hardware control. As for SMART FANTM 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 I2C 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 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.

7 Moreover, w83795g supports SMBus 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. Through the application software or BIOS, the users can read all the monitored parameters of the 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 DoctorTM or other 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. W83795G/ADG - 5 Mar/3/2011 Revision 2. GENERAL DESCRIPTION (W83795 ADG) W83795 ADG is an evolving version of the Nuvoton popular Hardware Monitor IC family.

8 W83795 ADG provides several innovative features, such as ASF compliant specification, SMBus ARP compatible command, Intel interface, and PROCESSOR HOT. Conventionally, W83795 ADG 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, , to work stably and efficiently. A 10-bit analog-to-digital converter (ADC) is built inside W83795 ADG. W83795 ADG can simultaneously Monitor 12 (up to 18) analog voltage inputs (including power VDD / 3 VSB / VBAT / VTT monitoring), 8 (up to 14) fan tachometer inputs, 2 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 CPU with thermal diode output.

9 W83795 ADG provides 2 PWM (pulse width modulation) / DC fan output modes for SMART FANTM control - Thermal CruiseTM mode and SMART FANTM IV mode. Under Thermal CruiseTM mode, temperatures of CPU and the system can be maintained within specific programmable ranges under the hardware control. As for SMART FANTM 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, W83795 ADG provides SMI#, OVT#, and BEEP signals to protect the system. W83795 ADG has 2 specific pins to provide address selection so that 4 W83795 ADG could be wired through I2C interface at the same time. W83795 ADG 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 W83795 ADG s compliance with 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 W83795 ADG, such as temperatures, voltages, fan speed and case open.

10 Moreover, W83795 ADG supports SMBus ARP command to solve the problem of address conflicts by dynamically assigning a new unique address for W83795 ADG ASF Function after W83795 ADG s UDID is sent. Through the application software or BIOS, the users can read all the monitored parameters of the 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 DoctorTM or other 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. W83795G/ADG - 6 Mar/3/2011 Revision 3. FEATURES ( w83795g ) Monitoring Items VOLTAGE Up to 21 voltage sensing inputs.