NCT7802Y

Nuvoton Hardware Monitoring IC NCT7802Y with PECI 3.0 interface Date: Feb/2012 Revision: 1.2 NCT7802Y Table of Content1. GENERAL DESCRIPTION ......................................................................................................... 1 2. FEATURES ................................................................................................................................. 1 2.1 Temperature Measurement ............................................................................................ 1 2.2 Voltage Measurement ..................................................................................................... 1 2.3 Fan Control ..................................................................................................................... 1 2.4 Event Notification ............................................................................................................ 1 2.5 General ........................................................................................................................... 2 3. KEY SPECIFICATIONS .............................................................................................................. 2 4. PIN CONFIGURATION ............................................................................................................... 3 5. PIN DESCRIPTION ..................................................................................................................... 3 6. 5.1 PIN TYPE DISCRIPTION ............................................................................................... 3 5.2 PIN DISCRIPTION .......................................................................................................... 4 DESCRIPTION ............................................................................................................................ 6 6.1 GENERAL DESCRIPTION ............................................................................................. 6 6.2 ACCESS INTERFACE .................................................................................................... 6 6.2.1 Data write to the internal register ...................................................................................... 6 6.2.2 Data read from the internal register .................................................................................. 6 6.3 ADDRESS SETTING ...................................................................................................... 7 6.4 TEMPERATURE MONITOR DATA FORMAT ................................................................ 7 6.4.1 The local temperature (on-die) data with 8-bit 2`s complement format............................. 7 6.4.2 The remote temperature data with 11-bit 2‟s complement format..................................... 8 6.5 VOLTAGE SENSE DATA FORMAT ............................................................................... 8 6.6 FAN_IN Count Calculation .............................................................................................. 8 6.7 FAN_OUT Duty Cycle / DC Level Calculation ................................................................ 9 6.8 SMART FAN TM IV Control Parameters ........................................................................... 9 6.8.1 Step Up Time / Step Down Time ...................................................................................... 9 6.8.2 Fan Output Start-up Value................................................................................................ 9 6.8.3 Fan Output Nonstop ......................................................................................................... 9 6.8.4 Fan Output Stop Time ...................................................................................................... 9 TM 6.9 SMART FAN IV ......................................................................................................... 10 6.10 PECI .............................................................................................................................. 11 6.11 ALERT# Output............................................................................................................. 13 6.11.1 ALERT# Output Mechanism ......................................................................................... 13 6.11.2 ALERT# Response Address ......................................................................................... 14 6.12 T_CRIT# Output............................................................................................................ 14 6.13 SMI# Output .................................................................................................................. 14 6.13.1 Temperature ................................................................................................................. 14 6.13.2 Voltage ......................................................................................................................... 16 - I - Feb, 2012 Version: 1.2 NCT7802Y 6.13.3 7. Fan ............................................................................................................................... 16 6.14 RESET# Output ............................................................................................................ 16 6.15 Programming from EEPROM ....................................................................................... 16 REGISTER DESCRIPTION ...................................................................................................... 17 7.1 BANK0 REGISTER MAP .............................................................................................. 17 7.2 BANK 0 REGISTER DETAIL ........................................................................................ 22 7.2.1 Bank Select Register ...................................................................................................... 22 7.2.2 Remote Diode 1 Temperature Readout Register (MSB) ................................................ 22 7.2.3 Remote Diode 2 Temperature Readout Register (MSB) ................................................ 22 7.2.4 Remote Diode 3 Temperature Readout Register (MSB) ................................................ 22 7.2.5 Local Diode Temperature Readout Register (MSB) ....................................................... 23 7.2.6 Temperature Readout Register (LSB) ............................................................................ 23 7.2.7 PECI 0 Temperature Readout Register (MSB) ............................................................... 23 7.2.8 PECI 1 Temperature Readout Register (MSB) ............................................................... 23 7.2.9 Read PECI Temperature Readout Register (LSB) ......................................................... 24 7.2.10 VCC Readout Register (MSB) ...................................................................................... 24 7.2.11 VCore Readout Register (MSB) ................................................................................... 24 7.2.12 VSEN1 Readout Register (MSB) .................................................................................. 24 7.2.13 VSEN2 Readout Register (MSB) .................................................................................. 25 7.2.14 VSEN3 Readout Register (MSB) .................................................................................. 25 7.2.15 Voltage Readout Register (LSB) .................................................................................. 25 7.2.16 Fan Count 1 Readout Register (MSB) .......................................................................... 25 7.2.17 Fan Count 2 Readout Register (MSB) .......................................................................... 26 7.2.18 Fan Count 3 Readout Register (MSB) .......................................................................... 26 7.2.19 Fan Count Readout Register (LSB) .............................................................................. 26 7.2.20 MNTIMON Percent Register ......................................................................................... 26 7.2.21 Diode Fault Alert Status Register ................................................................................. 27 7.2.22 Temperature Low Alert Status Register ........................................................................ 27 7.2.23 Temperature High Alert Status Register ....................................................................... 27 7.2.24 Fan Alert Status Register ............................................................................................. 28 7.2.25 T_CRIT# Alert Status Register ..................................................................................... 28 7.2.26 GPIO Alert Status Register ........................................................................................... 28 7.2.27 Temperature SMI Status Register ................................................................................ 29 7.2.28 Voltage SMI Status Register......................................................................................... 29 7.2.29 Fan SMI Status Register .............................................................................................. 29 7.2.30 T_CRIT# Real Time Status Register ............................................................................ 30 7.2.31 Start Register................................................................................................................ 30 7.2.32 Mode Selection Register .............................................................................................. 30 7.2.33 PECI Enable Register ................................................................................................... 30 7.2.34 Fan Enable Register ..................................................................................................... 31 7.2.35 Voltage Monitor Enable Register .................................................................................. 31 7.2.36 Conversion Rate Register ............................................................................................ 31 7.2.37 Fault Queue Register ................................................................................................... 31 - II - Feb, 2012 Version: 1.2 NCT7802Y 7.2.38 Alert# High Limit Link to T_CRIT# Register .................................................................. 32 7.2.39 Reset Time Setting Register ......................................................................................... 32 7.2.40 Reset Limit Low Byte Register...................................................................................... 32 7.2.41 Reset Limit High Byte Register ..................................................................................... 32 7.2.42 SMI# Control Register .................................................................................................. 33 7.2.43 RTD1 Temperature High Limit Register ....................................................................... 33 7.2.44 RTD1 Temperature Low Limit Register ........................................................................ 33 7.2.45 RTD2 Temperature High Limit Register ....................................................................... 34 7.2.46 RTD2 Temperature Low Limit Register ........................................................................ 34 7.2.47 RTD3 Temperature High Limit Register ....................................................................... 34 7.2.48 RTD3 Temperature Low Limit Register ........................................................................ 34 7.2.49 LTD Temperature High Limit Register .......................................................................... 34 7.2.50 LTD Temperature Low Limit Register ........................................................................... 35 7.2.51 DTS Temperature High Limit Register .......................................................................... 35 7.2.52 DTS Temperature Low Limit Register .......................................................................... 35 7.2.53 RTD1 TCRIT Threshold Register ................................................................................. 35 7.2.54 RTD2 TCRIT Threshold Register ................................................................................. 35 7.2.55 RTD3 TCRIT Threshold Register ................................................................................. 36 7.2.56 LTD TCRIT Threshold Register .................................................................................... 36 7.2.57 DTS TCRIT Threshold Register.................................................................................... 36 7.2.58 VSEN1 High Limit Low Byte Register ........................................................................... 36 7.2.59 VSEN1 Low Limit Low Byte Register ............................................................................ 36 7.2.60 VSEN2 High Limit Low Byte Register ........................................................................... 37 7.2.61 VSEN2 Low Limit Low Byte Register ............................................................................ 37 7.2.62 VSEN3 High Limit Low Byte Register ........................................................................... 37 7.2.63 VSEN3 Low Limit Low Byte Register ............................................................................ 37 7.2.64 VCC High Limit Low Byte Register ............................................................................... 37 7.2.65 VCC Low Limit Low Byte Register ................................................................................ 38 7.2.66 VSEN Limit High Byte 1 Register ................................................................................. 38 7.2.67 VSEN Limit High Byte 2 Register ................................................................................. 38 7.2.68 FANIN1 Limit Low Byte Register .................................................................................. 38 7.2.69 FANIN2 Limit Low Byte Register .................................................................................. 39 7.2.70 FANIN3 Limit Low Byte Register .................................................................................. 39 7.2.71 FANIN1 Limit High Byte Register ................................................................................. 39 7.2.72 FANIN2 Limit High Byte Register ................................................................................. 39 7.2.73 FANIN3 Limit High Byte Register ................................................................................. 40 7.2.74 ALERT Mask Register Register .................................................................................... 40 7.2.75 ALERT/SMI Mask Temperature Channel Register ....................................................... 40 7.2.76 ALERT/SMI Mask Fan Channel Register ..................................................................... 41 7.2.77 SMI Mask Voltage Channel Register ............................................................................ 41 7.2.78 T_CRIT# Mask Register ............................................................................................... 41 7.2.79 GPIO Alert Mask Register ............................................................................................ 42 7.2.80 GPIO Enable Register .................................................................................................. 42 7.2.81 GPIO Mode Register .................................................................................................... 42 - III - Feb, 2012 Version: 1.2 NCT7802Y 7.2.82 GPIO Output Type Register.......................................................................................... 43 7.2.83 GPIO Input Data Register ............................................................................................. 43 7.2.84 GPIO Output Data Register .......................................................................................... 43 7.2.85 BEEP Voltage Channel Enable Register ...................................................................... 44 7.2.86 BEEP Fan Channel Enable Register ............................................................................ 44 7.2.87 BEEP Temperature Channel Enable Register .............................................................. 44 7.2.88 BEEP Enable Register ................................................................................................. 45 7.2.89 Fan Control Output Type .............................................................................................. 45 7.2.90 Fan Control Output Mode ............................................................................................. 45 7.2.91 Fan Control 1 Output Value .......................................................................................... 46 7.2.92 Fan Control 2 Output Value .......................................................................................... 46 7.2.93 Fan Control 3 Output Value .......................................................................................... 46 7.2.94 Close-Loop Fan Control RPM mode Register and Configure Register of PECI Error (CRPE) 46 7.2.95 Temperature to Fan mapping Relationships Register .................................................. 47 7.2.96 Temperature to Fan mapping Relationships Register .................................................. 47 7.2.97 Fan Control Configuration Register 1 ........................................................................... 48 7.2.98 Fan Control Configuration Register 2 ........................................................................... 48 7.2.99 Fan Control Configuration Register 3 ........................................................................... 49 7.2.100 Fan Control Configuration Register 4 ......................................................................... 49 7.2.101 Close-Loop Fan Control RPM mode Tolerance Register ........................................... 49 7.2.102 FANCTL Step Up Time Register ................................................................................ 50 7.2.103 FANCTL Step Down Time Register ............................................................................ 50 7.2.104 Default Fan Speed Register ....................................................................................... 50 7.2.105 FANCTL1 PWM Prescalar Register ........................................................................... 50 7.2.106 FANCTL2 PWM Prescalar Register ........................................................................... 51 7.2.107 FANCTL3 PWM Prescalar Register ........................................................................... 52 7.2.108 Temp1 Hystersis Register .......................................................................................... 52 7.2.109 Temp2 Hystersis Register .......................................................................................... 52 7.2.110 Temp3 Hystersis Register .......................................................................................... 52 7.2.111 FANCTL Start Duty Cycle Register ............................................................................ 53 7.2.112 FANCTL Stop Time Register ...................................................................................... 53 7.2.113 NonStop Disable Register .......................................................................................... 53 7.2.114 Fan Output Min Value when PECI Error Register (FOMV) ......................................... 53 7.2.115 Table 1 X-axis Transition Point 1 Register ................................................................. 54 7.2.116 Table 1 X-axis Transition Point 2 Register ................................................................. 54 7.2.117 Table 1 X-axis Transition Point 3 Register ................................................................. 54 7.2.118 Table 1 X-axis Transition Point 4 Register ................................................................. 54 7.2.119 Table 1 X-axis Critical Point Register ......................................................................... 55 7.2.120 Table 1 Y-axis Transition Point 1 Register ................................................................. 55 7.2.121 Table 1 Y-axis Transition Point 2 Register ................................................................. 55 7.2.122 Table 1 Y-axis Transition Point 3 Register ................................................................. 55 7.2.123 Table 1 Y-axis Transition Point 4 Register ................................................................. 56 7.2.124 Table 2 X-axis Transition Point 1 Register ................................................................. 56 - IV - Feb, 2012 Version: 1.2 NCT7802Y 7.2.125 Table 2 X-axis Transition Point 2 Register ................................................................. 56 7.2.126 Table 2 X-axis Transition Point 3 Register ................................................................. 56 7.2.127 Table 2 X-axis Transition Point 4 Register ................................................................. 57 7.2.128 Table 2 X-axis Critical Point Register ......................................................................... 57 7.2.129 Table 2 Y-axis Transition Point 1 Register ................................................................. 57 7.2.130 Table 2 Y-axis Transition Point 2 Register ................................................................. 57 7.2.131 Table 2 Y-axis Transition Point 3 Register ................................................................. 58 7.2.132 Table 2 Y-axis Transition Point 4 Register ................................................................. 58 7.2.133 Table 3 X-axis Transition Point 1 Register ................................................................. 58 7.2.134 Table 3 X-axis Transition Point 2 Register ................................................................. 58 7.2.135 Table 3 X-axis Transition Point 3 Register ................................................................. 59 7.2.136 Table 3 X-axis Transition Point 4 Register ................................................................. 59 7.2.137 Table 3 X-axis Critical Point Register ......................................................................... 59 7.2.138 Table 3 Y-axis Transition Point 1 Register ................................................................. 59 7.2.139 Table 3 Y-axis Transition Point 2 Register ................................................................. 60 7.2.140 Table 3 Y-axis Transition Point 3 Register ................................................................. 60 7.2.141 Table 3 Y-axis Transition Point 4 Register ................................................................. 60 7.2.142 TD1 Offset Register .................................................................................................... 60 7.2.143 TD2 Offset Register .................................................................................................... 61 7.2.144 TR1 Offset Register .................................................................................................... 61 7.2.145 TR2 Offset Register .................................................................................................... 61 7.2.146 TR3 Offset Register .................................................................................................... 61 7.2.147 Digital Filter Level Select Register .............................................................................. 62 7.2.148 Programmable Temperature 1 Register ..................................................................... 62 7.2.149 Programmable Temperature 2 Register ..................................................................... 62 7.2.150 Software Reset Register............................................................................................. 62 7.2.151 Vendor ID Register ..................................................................................................... 63 7.2.152 Chip ID Register ......................................................................................................... 63 7.2.153 Version ID Register .................................................................................................... 63 7.3 BANK 1 REGISTER MAP ............................................................................................. 64 7.4 BANK 1 REGISTER DETAIL ........................................................................................ 66 7.4.1 PECI Control Register 1 ................................................................................................. 66 7.4.2 PECI Control Register 2 ................................................................................................. 66 7.4.3 PECI Control Register 3 ................................................................................................. 66 7.4.4 Report Temperature Style Register ................................................................................ 67 7.4.5 Address Content for Manual Command Register ........................................................... 67 7.4.6 Write Length for Manual Command Register ................................................................. 67 7.4.7 Read Length for Manual Command Register ................................................................. 68 7.4.8 Command Code for Manual Command Register ............................................................ 68 7.4.9 Agent0 Base Temperature Register ............................................................................... 68 7.4.10 Agent1 Base Temperature Register ............................................................................. 68 7.4.11 Generic Write in Data 1 to Client Register .................................................................... 69 7.4.12 Generic Write in Data 2 to Client Register .................................................................... 69 - V - Feb, 2012 Version: 1.2 NCT7802Y 8. 7.4.13 Generic Write in Data 3 to Client Register .................................................................... 69 7.4.14 Generic Write in Data 4 to Client Register .................................................................... 69 7.4.15 Generic Write in Data 5 to Client Register .................................................................... 70 7.4.16 Generic Write in Data 6 to Client Register .................................................................... 70 7.4.17 Generic Write in Data 7 to Client Register .................................................................... 70 7.4.18 Generic Write in Data 8 to Client Register .................................................................... 70 7.4.19 Generic Write in Data 9 to Client Register .................................................................... 71 7.4.20 Generic Write in Data 10 to Client Register .................................................................. 71 7.4.21 Generic Write in Data 11 to Client Register .................................................................. 71 7.4.22 Generic Write in Data 12 to Client Register .................................................................. 71 7.4.23 Agent Relative Temperature Register .......................................................................... 72 7.4.24 Agent Characteristic Register ....................................................................................... 73 7.4.25 Generic Read Out Data 1 from Client Register............................................................. 73 7.4.26 Generic Read Out Data 2 from Client Register............................................................. 74 7.4.27 Generic Read Out Data 3 from Client Register............................................................. 74 7.4.28 Generic Read Out Data 4 from Client Register............................................................. 74 7.4.29 Generic Read Out Data 5 from Client Register............................................................. 74 7.4.30 Generic Read Out Data 6 from Client Register............................................................. 75 7.4.31 Generic Read Out Data 7 from Client Register............................................................. 75 7.4.32 Generic Read Out Data 8 from Client Register............................................................. 75 7.4.33 Generic Read Out Data 9 from Client Register............................................................. 75 ELECTRICAL CHARACTERISTICS ......................................................................................... 76 8.1 Absolute Maximum Ratings .......................................................................................... 76 8.2 DC Characteristics ........................................................................................................ 76 8.3 AC Characteristics ........................................................................................................ 77 9. ORDERING INFORMATION ..................................................................................................... 78 10. TOP MARKING SPECIFICATIONS .......................................................................................... 78 11. PACKAGE DRAWING AND DIMENSIONS .............................................................................. 79 12. REVISION HISTORY ................................................................................................................ 80 - VI - Feb, 2012 Version: 1.2 NCT7802Y 1. GENERAL DESCRIPTION NCT7802Y is a Nuvoton Hardware Monitor IC, which can monitor several critical hardware parameters of the systems, including power supply voltages, fan speeds, and temperatures, to make the system work stably and efficiently, especially for server and workstation applications. NCT7802Y supports one on-die and up to 5 remote temperature sensors with SMBus interface. There‟s a 10-bit analog-to-digital converter (ADC) is built inside NCT7802Y, to convert the monitored temperature values. The remote inputs can be connected to CPU/GPU thermal diode or any thermal diode sensors and thermistor, it also can get the Intel® CPU temperature directly via Intel ® PECI3.0 interface. Additionally, the NCT7802Y can monitor up to 5 analog voltage inputs, 3 fan tachometer inputs and TM supports up to 6 multifunctional GPIO. The SMART FAN IV mode provides 4 sets of temperature setting points, and they can also control the duty cycle of fan outputs. It provides an easy method to implement quiet and cooling solution with maximum safety and flexibility. Meanwhile, there‟re 5 pure hardware event pins for independent alarm signals, and the all threshold values could be set for system protection without any timing delay. 2. FEATURES 2.1 Temperature Measurement  Measure the temperature with high accuracy  One local on-die thermal sensor  Two pairs thermal diode (current mode) temperature channels  Three thermistor mode temperature channels  Support Intel® PECI 3.0 interfaces for reading Intel® CPU temperature 2.2  2.3 Voltage Measurement Up to five voltage inputs, three multi-functions with thermal diode pair Fan Control  Three fan control outputs multi-function (PWM mode supported)  Two fan control outputs support DC mode  Three fan tachometer input multi-function  SMART FAN 2.4 TM IV mode or Manual mode to control the fan speed Event Notification  Support 5 alarm outputs: ALERT#, T_CRIT#, RESET#, SMI#, BEEP signals to activate system protection.  ALERT# output supports SMBus TM 2.0 ARA function - 1 - Feb, 2012 Version: 1.2 NCT7802Y 2.5 General  Provide up to 6 GPIO pins (multi-function with fan control).  I C® Compatible System Management bus (SMBus)  Support 8 SMBus address selection  Programming from EEPROM support  3.3V±5% VCC operation  20-pin QFN package (Halogen free) 2 3. KEY SPECIFICATIONS   Voltage monitoring accuracy VSEN input 10mV VCC input 80mV Temperature Sensor Accuracy Remote Diode Sensor Accuracy (25~85C)  1C typ. On-chip Temperature Sensor Accuracy (25~70C)  2C typ. Remote Temperature Sensor Resolution 0.125C On-chip Temperature Sensor Resolution 1 C  Supply Voltage  Operating Supply Current  3.3V  5% VCC 5mA typ. VTT < 1mA Operating Temperature Range -40C ~ 85C *1 *1 Guaranteed by design from -40~85 degree C, 100% tested at 85 degree C. - 2 - Feb, 2012 Version: 1.2 NCT7802Y FANIN1_GPIO1 FANCTL1/GPIO2/ADD0 FANIN2/GPIO3 FANCTL2/GPIO4/ADD1 FANIN3/GPIO5 4. PIN CONFIGURATION 15 14 13 12 11 FANCTL3/GPIO6/ADD2 16 10 SCL GND 17 9 SDA NCT7802Y VCORE 18 8 T_CRIT#/BEEP 1 2 3 4 5 PECI ‧ VTT 6 RESET# VCC TD2+/TR2/VSEN2 20 TD1+/TR1/VSEN1 7 ALERT#/SMI# TD1-/VREF TD2-/TR3/VSEN3 19 5. PIN DESCRIPTION 5.1 PIN TYPE DISCRIPTION PIN TYPE OD12 PIN ATTRIBUTE Open-drain output pin with 12 mA sink capability INts TTL level input pin and schmitt trigger, with 5V tolerance support V1 Type of PECI AIN Input pin (Analog) OUT12 Output pin with 12 mA sink/source capability AOUT Output pin (Analog) P Power or Ground Pin - 3 - Feb, 2012 Version: 1.2 NCT7802Y 5.2 PIN DISCRIPTION PIN NO. PIN NAME I/O FUNCTION TD1- AIN Connect to Thermal Diode 1 Cathode VREF AOUT VREF output for Thermistor function 1 TD1+ 2 TR1 Connect to Thermal Diode 1 Anode AIN VSEN1 Thermistor 1 sensing input Voltage sensing input. Detection range is 0~2.048V 3 VCC P Power supply, Voltage input 3.3V±5% It is also a voltage sensing input 4 VTT P Intel® CPU Vtt power 5 PECI V1 Intel® CPU PECI interface 6 RESET# OD12 ALERT# 7 Reset alarm output, for detect VCC power fault Alarm output, for interrupt control (default) OD12 SMI# Alarm output, for interrupt control T_CRIT# 8 OD12 BEEP T_CRIT alarm output, for interrupt or shutdown control. (default) BEEP output when abnormal event occurs (Frequency:300Hz/600Hz, Tone=500mS) 9 SDA INts/OD12 10 SCL INts SMBus Clock FANIN1 INts Fan tachometer input (default) GPIO1 INts /OD12 /OUT12 General purpose I/O function 11 SMBus bi-directional data Fan speed control PWM/DC output FANCTL1 12 OUT12/OD12 /AOUT It can be configured to PWM/DC mode by registers. Default is PWM output As DC output, 256 steps output voltage scaled to 0~VCC GPIO2 INts /OD12 /OUT12 General purpose I/O function FANIN2 INts Fan tachometer input (default) GPIO3 INts /OD12 /OUT12 General purpose I/O function 13 - 4 - Feb, 2012 Version: 1.2 NCT7802Y PIN NO. PIN NAME I/O FUNCTION Fan speed control PWM/DC output FANCTL2 14 OUT12/OD12 /AOUT It can be configured to PWM/DC mode by registers. Default is PWM output As DC output, 256 steps output voltage scaled to 0~VCC GPIO4 INts /OD12 /OUT12 General purpose I/O function FANIN3 INts Fan tachometer input (default) GPIO5 INts /OD12 /OUT12 General purpose I/O function FANCTL3 OUT12/OD12 GPIO6 INts /OD12 /OUT12 17 GND P 18 VCORE AIN 15 16 TD219 TR3 AIN VSEN2 Power supply ground Voltage sensing input. Detection range is 0~2.048V Thermistor 3 sensing input Voltage sensing input. Detection range is 0~2.048V TD2+ TR2 General purpose I/O function Connect to Thermal Diode 2 Cathode VSEN3 20 Fan speed control PWM output Connect to Thermal Diode 2 Anode AIN Thermistor 2 sensing input Voltage sensing input. Detection range is 0~2.048V - 5 - Feb, 2012 Version: 1.2 NCT7802Y 6. DESCRIPTION 6.1 GENERAL DESCRIPTION The NCT7802Y is a Nuvoton Hardware Monitor IC, contains one on-die and up to 5 remote temperature sensors, with SMBus and Intel PECI3.0 interface. There‟re also five voltage monitoring channels, 3 fan control groups, and GPIO functions with SMBus interface. NCT7802Y supports up to 8 sets SMBus address selection, it also provides ALERT#/SMI#/T_CRIT#/BEEP and RESET# alarm signals for event notification. 6.2 ACCESS INTERFACE NCT7802Y provides SMBus to access the internal register, supports SMBus byte write and byte read protocols. 6.2.1 Data write to the internal register 6.2.2 Data read from the internal register - 6 - Feb, 2012 Version: 1.2 NCT7802Y 6.3 ADDRESS SETTING NCT7802Y has three address pins and multi-function with FANCTRL1~3, the SMBus address will be strapped when VCC ready 100mS, during the 100mS, the level of strapping pins must be fixed. The address will be retained as long as the VCC of NCT7802Y is maintained. The pull-up power plane must be the same as the VCC power of NCT7802Y. ADD0(FANCTRL1) ADD1(FANCTRL2) ADD2(FANCTRL3) ADDRESS 0 0 0 0101 000X 0 0 1 0101 001X 0 1 0 0101 010X 0 1 1 0101 011X 1 0 0 0101 100X 1 0 1 0101 101X 1 1 0 0101 110X *1 1 1 1 0101 111X *2 X=Read/Write# Bit *1 When set the NCT7802Y to address 5Ch, EEPROM loading function will be enabled, EEPROM address has to be ACh, refer to section 6.15. *2 When set the NCT7802Y to address 5Eh, EEPROM loading function will be enabled, EEPROM address has to be AEh, refer to section 6.15. 6.4 6.4.1 TEMPERATURE MONITOR DATA FORMAT The local temperature (on-die) data with 8-bit 2`s complement format TEMPERATURE 8-BIT DIGITAL OUTPUT +127°C 0111,1111 +25°C 0001,1001 +2°C 0000,0010 +1°C 0000,0001 +0°C 0000,0000 - 1°C 1111,1111 - 2°C 1111,1110 - 25°C 1110,0111 - 128°C 1000,0000 - 7 - Feb, 2012 Version: 1.2 NCT7802Y 6.4.2 The remote temperature data with 11-bit 2’s complement format TEMPERATURE 8-BIT DIGITAL OUTPUT HIGH BYTE 3-BIT DIGITAL OUTPUT LOW BYTE +127.875°C 0111,1111 111X,XXXX +25.750°C 0001,1001 110X,XXXX +2.250°C 0000,0010 010X,XXXX +1.125°C 0000,0001 001X,XXXX +0.000°C 0000,0000 000X,XXXX - 1.125°C 1111,1110 111X,XXXX - 2.250°C 1111,1101 110X,XXXX - 25.750°C 1110,0110 010X,XXXX - 127.875°C 1000,0000 001X,XXXX 6.5 VOLTAGE SENSE DATA FORMAT MNTVSEN Low Byte together with MNTVSEN High Byte forms the 10-bit count value. If MNTVSEN High Byte readout is read successively, the NCT7802Y will latch the MNTVSEN Low Byte for next read. Then voltage readout high byte and low byte are combined to 10-bitVoltageValue. For VSEN1~3 and Vcore monitoring, real voltage calculations should follow the formula: Voltage (V )  10bitCountVa lue  0.002 VOLTAGE MNTVSEN HIGH BYTE MNTVSEN LOW BYTE +2 V 1111,1010 00XX,XXXX +1 V 0111,1101 00XX,XXXX +0.036 V 0000,0100 10XX,XXXX +0 V 0000,0000 00XX,XXXX For VCC monitoring, real voltage calculations should follow the formula: Voltage (V )  10bitCountVa lue  0.004 6.6 FAN_IN Count Calculation The FAN_IN tachometer high byte and low byte are combined to 13-bitCountValue. Real RPM (Rotate per Minute) calculation should follow the formula: FanSpeed ( RPM )  1.35  10 6 (13  bitCountVa lue )  ( FanPoles ) 4 In this formula, FanPoles stands for the number of NS pole pairs inside the fan. Normally an N-S-N-S Fan (FanPoles=4) generates 2 pulses after completing one rotation. - 8 - Feb, 2012 Version: 1.2 NCT7802Y 6.7 FAN_OUT Duty Cycle / DC Level Calculation The NCT7802Y provides 3 set of PWM for fan speed control. The duty cycle of PWM can be programmed by an 8-bit register. The expression of duty cycle can be represented as follow formula: Duty  cycle(%)  Programmed 8 - bit Register Value  100% 255 The NCT7802Y provides 2 set of DC output for fan speed control on FANCTL1 and FANCTL2. The DC output can be programmed by an 8-bit register. The expression of DC level can be represented as follow formula: Output Voltage (V)  VCC  6.8 SMART FANTM IV Control Parameters TM In SMART FAN 6.8.1 Programmed 8 - bit Register Value 255 IV Mode, there are some Fan control parameters as below descriptions: Step Up Time / Step Down Time TM SMART FAN IV is designed for the smooth operation of the fan. The Up Time / Down Time register defines the time interval between successive duty increases or decreases. If this value is set too small, the fan will not have enough time to speed up after tuning the duty and sometimes may result in unstable fan speed. On the other hand, if Up Time / Down Time is set too large, the fan may not work fast enough to dissipate the heat. This register should never be set to 0, otherwise, the fan duty will be abnormal. 6.8.2 Fan Output Start-up Value From still to rotate, the fan usually needs a higher fan output value to generate enough torque to conquer the restriction force. Thus the Fan Output Start-up Value is used to turn on the fan with the specified output value. 6.8.3 Fan Output Nonstop It takes some time to bring a fan from still to working state. Therefore, Nonstop value are designed with first FANCTL step output to keep the fan working when the system does not require the fan to help reduce heat but still want to keep the fast response time to speed up the fan. 6.8.4 Fan Output Stop Time TM A time interval is specified to turn off the fan if SMART FAN fan which has already reached the Stop time. IV continuously requests to slow down the UpTime DownTime NonStop Start FanSpeed StopTime Smart Fan Arising Fan Speed Smart Fan Lowering FanSpeed Figure 6-1 SMART FAN TM - 9 - IV Control Parameters Feb, 2012 Version: 1.2 NCT7802Y 6.9 SMART FANTM IV TM SMART FAN IV supports Fan Duty Outputs Mode and Close Loop Fan Control (RPM) Mode to control the fan speed. There‟re 3 slopes can be obtained by setting FanDuty/RPM1~FanDuty/RPM4 and T1~T4 through the registers. When the temperature rises, FAN Output will calculate the target FanDuty/RPM based on the current slope. For example, assuming Tx is the current temperature and FanDuty/RPM is the target, then the slope: X2  FanDuty3 / RPM 3  FanDuty 2 / RPM 2 T 3  T 2 Fan Output: T arg et FanDuty or RPM  FanDuty 2 or RPM 2  Tx  T 2  X 2 Figure 6-2 SMART FAN TM IV Mechanism Fanduty/RPM (unit RPM = 50 ) Critical Hyst. Operation Hyst. FullSpeed (FF, 100%) Fanduty4/RPM4 Fanduty3/RPM3 Ty Fanduty2/RPM2 X3 X2 X1 Fanduty1/RPM1 Temperature T1 TM T2 Tx In addition, SMART FAN IV can also set up Critical temperature exceeds Critical Temperature, external fan the largest target FanDuty or RPM, Which is 0xFF. determined in accordance to the slope only when the Hyst). T3 T4 TRCritical Temperature and Hysteresis. If the current will be forced by maximum FanDuty to meet The target FanDuty & RPM value will be temperature falls below (TCritical – Critical NCT7802Y provide 3 temperature sources selection to map the fan, the algorithm will make a decision to control the fan as below figure: - 10 - Feb, 2012 Version: 1.2 NCT7802Y Any Temp request faster Fan?? Yes Speed Up Yes Hold current Speed No Any Temp request f hold current speed?? No Slow Down 6.10 PECI PECI (Platform Environment Control Interface) is a new digital interface to read the CPU temperature of Intel® CPUs. With a bandwidth ranging from 2 Kbps to 2 Mbps, PECI uses a single wire for self® clocking and data transfer. By interfacing to the Digital Thermal Sensor (DTS) in the Intel CPU, PECI reports a negative temperature (in counts) relative to the processor‟s temperature at which the thermal control circuit (TCC) is activated. At the TCC Activation temperature, the Intel CPU will operate at reduced performance to prevent the device from thermal damage. PECI is one of the temperature sensing methods that the NCT7802Y supports. The NCT7802Y contains a PECI master and reads the CPU PECI temperature. The CPU is a PECI client. The PECI temperature values returning from the CPU are in “counts” which are approximately linear in relation to changes in temperature in degrees centigrade. However, this linearity is approximate and cannot be guaranteed over the entire range of PECI temperatures. For further information, refer to the PECI specification. All references to “temperature” in this section are in “counts” instead of “°C”. Figure 6-3 shows a typical fan speed (PWM duty cycle) and PECI temperature relationship. Fan Speed (PWM Duty Cycle) Tcontrol TCC Activation Duty1 Duty2 -20 -10 0 PECI Temperature (counts) Figure 6-3 PECI Temperature - 11 - Feb, 2012 Version: 1.2 NCT7802Y In this illustration, when PECI temperature is -20, the PWM duty cycle for fan control is at Duty2. When CPU is getting hotter and the PECI temperature is -10, the PWM duty cycle is at Duty1. At Tcontrol PECI temperature, the recommendation from Intel is to operate the CPU fan at full speed. Therefore Duty1 is 100% if this recommendation is followed. The value of Tcontrol can be obtained by reading the related Machine Specific Register (MSR) in the Intel CPU. The Tcontrol MSR address is usually in the BIOS Writer‟s guide for the CPU family in question. Refer to the relevant CPU documentation from Intel for more information. In this example, Tcontrol is -10. When the PECI temperature is below -20, the duty cycle is fixed at Duty2 to maintain a minimum (and constant) RPM for the CPU fan. NCT7802Y‟s fan control circuit can only accept positive real-time temperature inputs and limits setting TM (when SMART FAN IV mode). The device provides offset registers to „shift‟ the negative PECI readings to positive values otherwise the fan control circuit will not function properly. The offset registers are the Tbase registers located at Bank1, Index09h and Index0Ah. All default values of these Tbase registers are 8‟h00.These registers should be programmed with (positive) values so that the resultant value (Tbase + PECI) is always positive. The unit of the Tbase register contents is “count” to match that of PECI values. The resultant value (Tbase + PECI) should not be interpreted as the “temperature” (whether in count or °C) of the PECI client (CPU). Figure 6-4 Temperature and Fan Speed Relation after Tbase Offsets shows the temperature/fan speed relationship after Tbase offsets are applied (based on Figure 6-3 PECI Temperature). This view is from the perspective of the NCT7802Y fan control circuit. Figure 6-4 Temperature and Fan Speed Relation after Tbase Offsets Assuming Tbase is set to 100 and the PECI temperature is -15 , the real-time temperature value to the fan control circuit will be 85 (-15 + 100). The value of 55 (hex) will appear in the relevant real-time temperature register. TM While using SMART FAN IV control function of NCT7802Y, BIOS/software must include Tbase in determining the thresholds (limits). In this example, assuming Tcontrol is -10 and Tbase is set to 100, - 12 - Feb, 2012 Version: 1.2 NCT7802Y the threshold temperature value corresponding to the “100% fan duty cycle” event is 90 (-10+100). The value of 5A (hex) should be written to the relevant threshold register. Tcontrol is typically -10 to -20 for PECI-enabled CPUs. Base on that, a value of 85 ~100 for Tbase could be set for proper operation of the fan control circuit. This recommendation is applicable for most designs. In general, the concept presented in this section could be used to determine the optimum value of Tcontrol to match the specific application. 6.11 ALERT# Output The NCT7802Y ALERT# pin is an active-low open-drain output pin which is triggered when temperature measured and fan exceeds the limitation defined in the limit registers. 6.11.1 ALERT# Output Mechanism Figure 6-5 shows the mechanism of the ALERT# output. In this mode, the NCT7802Y will set the ALERT mask bit of Configuration Register during a read of the Status Register if any flag in Status Register, except the ADC_Busy flag and Remote Diode Open flag, is set. This prevents further ALERT# triggering until the master has reset the ALERT mask bit (write 0 to Alert_MSK in Bank0 CR[21h] Bit7), at the end of the interrupt service routine. The Status Register flags are cleared only upon a read Status Register command from the master and will be re-alerted at the end of the next temperature conversion if the measured temperature still falls outside of the allowed range. Temperature Value Temp Limt Alert# Status Alert Mask Clear Mask Read Status register register ARA Figure 6-5 ALERT# Output Mechanism - 13 - Feb, 2012 Version: 1.2 NCT7802Y 6.11.2 ALERT# Response Address Figure 6-6 shows the mechanism of the SMBus ALERT# Response Address (ARA) support on ALERT# output. In this mode, the ALERT# output of the NCT7802Y is connected to the SMBus alert line which has more than one device connected to it. Through such and implementation, SMBus alert mode can assist the master in resolving which salve generates an interrupt. When the measured temperature falls outside of the allowed range, the ALERT# pin will be pulled low and the corresponding alert flags in Status Register will be set to 1. The ALERT# mask bit will just be set if there is a read command for Status Register or when ARA occurs from master (Alert Response Address is 0001100x). Meanwhile, the NCT7802Y will generate and return its own address to the master. If the temperature never falls outside of the allowed range, the latched ALERT# pin can release by the reset ALERT mask bit and the latched corresponding alert flags in Status Register can release by reading command for Status Register. Figure 6-6 SMBus ARA Mechanism 6.12 T_CRIT# Output T_CRIT# output pulls low when the measured temperature exceeds the critical temperature threshold point. Once the T_CRIT# output pulls low, it will not be set high until the measured temperature is lower than critical temperature threshold point. 6.13 SMI# Output 6.13.1 Temperature SMI# for temperature monitoring provides 3 modes: Comparator Interrupt Mode, Two-Times Interrupt Mode, and the One-Time Interrupt Mode. 6.13.1.1. Comparator Interrupt Mode Temperature exceeding TO causes an interrupt and this interrupt will be reset when reading all of the Interrupt Status Registers. Once an interrupt event has occurred by exceeding T O, then reset, if the temperature remains above the THYST, the interrupt will occur again when the next conversion has completed. If an interrupt event has occurred by exceeding T O and not reset, the interrupts will not occur again. The interrupts will continue to occur in this manner until the temperature goes below THYST. - 14 - Feb, 2012 Version: 1.2 NCT7802Y 6.13.1.2. Two-Times Interrupt Mode Temperature exceeding TO causes an interrupt and then temperature going below T HYST will also cause an interrupt if the previous interrupt has been reset by reading all the interrupt Status Register. Once an interrupt event has occurred by exceeding T O, then reset, if the temperature remains above the THYST, the interrupt will not occur. 6.13.1.3. One-Time Interrupt Mode Temperature exceeding TO causes an interrupt and then temperature going below T HYST will not cause an interrupt. Once an interrupt event has occurred by exceeding TO, then going below THYST, an interrupt will not occur again until the temperature exceeding T O. - 15 - Feb, 2012 Version: 1.2 NCT7802Y 6.13.2 Voltage SMI# interrupt for voltage is Two-Times Interrupt Mode. Voltage exceeds high limit or going below low limit, it will causes an interrupt if the previous interrupt has been reset by reading all the interrupt Status Register. 6.13.3 Fan SMI# interrupt for fan is Two-Times Interrupt Mode. Fan count exceeds the limit, or exceeding and then going below the limit, it will cause an interrupt if the previous interrupt has been reset by reading all the interrupt Status Register. 6.14 RESET# Output The NCT7802Y provides a reset controller for the system‟s 3.3V supply rail. The RESET# pin will pull low pulse when the measured VCC below the threshold voltage. The RESET# pin set to „1‟ after the 3.3V VCC supply rises above its threshold voltage. 6.15 Self-Programming from EEPROM The NCT7802Y supports self-programming through an external I2C EEPROM during NCT7802Y power-on. The EEPROM is recommended to be 24C02 type. During 200ms period after power on, NCT7802Y will detect if the external EEPROM exists by issuing the SMBus Byte Read command with 50KHz SMBus clock frequency. If a NACK of SMBus protocol is detected, NCT7802Y will stop selfprogramming, otherwise, NCT7802Y will keep loading data from external EEPROM sequentially to Bank0 Index 00h~E2h registers. Therefore, other SMBus master has to avoid from accessing NCT7802Y during the 200ms after power-on. Please also refer to NCT7802Y APN for self-programming implementation. - 16 - Feb, 2012 Version: 1.2 NCT7802Y 7. REGISTER DESCRIPTION 7.1 BANK0 REGISTER MAP Idx Register Name Att Df 0 Bank Select R/W 00 RSV 1 Read RTD1 High Byte R 00 MNTRTD1[10:3] 2 Read RTD2 High Byte R 00 MNTRTD2[10:3] 3 Read RTD3 High Byte R 00 MNTRTD3[10:3] 4 Read LTD High Byte R 00 MNTLTD[7:0] 5 Read Temp Low Byte R 00 R 00 MNTPECI0[9:2] R 00 MNTPECI1[9:2] Read PECI 0 Temp High Byte Read PECI1 Temp High 7 Byte 6 7 6 5 4 3 MNTTD_Lsb[2:0] R 00 9 Read VCC R 00 MNTVCC[9:2] A Read VCore R 00 MNTVCore[9:2] C Read VSEN1 R 00 MNTVSEN1[9:2] D Read VSEN2 R 00 MNTVSEN2[9:2] E Read VSEN3 R 00 MNTVSEN3[9:2] F Read Volt Low Byte R 00 R FF MNTFAN1[12:5] R FF MNTFAN2[12:5] R FF MNTFAN3[12:5] R F8 11 12 13 15 MNTIMON_Percent R 00 17 Diode Fault Alert Status R 00 18 Low Alert Status R 00 19 High Alert Status R 00 1A Fan Alert Status R 00 1B TCRIT Alert Status R 00 1C GPIO Alert Status R 00 1D SMI Temp Status R 00 1E SMI Voltage status R 00 1F SMI FAN status 20 TCRIT Real Time Status R 00 R 00 0 RSV Read PECI Low Byte Read Fan Count 1High Byte Read Fan Count 2High Byte Read Fan Count 3High Byte Read Fan Count 1Low Byte 1 BKSEL 8 10 2 MNTPECI_Lsb[1:0] RSV MNTV_Lsb[1:0] RSV MNTFAN_Lsb[4:0] RSV MNTIMON_Percent RSV STS_PEC RSV I1 STS_PEC RSV I1 FAN_TAR FAN_TAR RSV 3 2 STS_PEC RSV I1 STS_GPI RSV O6 STS_PEC RSV I1 STS_DF3 STS_DF2 STS_DF1 STS_PEC I0 STS_PEC I0 FAN_TAR 1 STS_PEC I0 STS_GPI O5 STS_PEC I0 RSV RSV FAN_TAR FAN_TAR FAN_TAR 3 2 1 RSV - 17 - STS_AL4 STS_AL3 STS_AL2 STS_AL1 STS_AH4 STS_AH3 STS_AH2 STS_AH1 RSV FAN_FC3 FAN_FC2 FAN_FC1 STS_TC4 STS_TC3 STS_TC2 STS_TC1 STS_GPI STS_GPI STS_GPI STS_GPI O4 O3 O2 O1 STS_RTD STS_RTD STS_RTD STS_LTD 3 2 1 STS_VSE STS_VSE STS_VSE STS_VCC N3 N2 N1 RSV FAN_FC3 FAN_FC2 FAN_FC1 LTD_Texc RTD3_Te RTD2_Te RTD1_Te xc xc xc Feb, 2012 Version: 1.2 NCT7802Y Idx Register Name Att Df 7 21 START R/W 01 Msk_Alert 22 Mode Selection R/W 7F RSV 23 PECI Enable R/W 00 24 Fan Enable R/W 07 25 Voltage monitor Enable R/W 03 RSV 26 Conversion Rate R/W 03 RSV ConvRate[1:0] 27 Fault Queue R/W 03 RSV FaultQueue[1:0] 28 Alert High link to T_CRIT# R/W 00 RSV 29 Reset time setting R/W 04 RSV 2A Reset Limit Low Byte R/W EE 2B Reset Limit High Byte R/W 80 2F SMI Control R/W 00 30 RTD1 Temp High Limit R/W 55 RTD1_HL 31 RTD1 Temp Low Limit R/W 00 RTD1_LL 32 RTD2 Temp High Limit R/W 55 RTD2_HL 33 RTD2 Temp Low Limit R/W 00 RTD2_LL 34 RTD3 Temp High Limit R/W 55 RTD3_HL 35 RTD3 Temp Low Limit R/W 00 RTD3_LL 36 LTD Temp High Limit R/W 55 LTD_HL 37 LTD Temp Low Limit R/W 00 LTD_LL 38 DTS Temp High Limit R/W 55 DTS_HL 39 DTS Temp Low Limit R/W 00 DTS_LL 3A RTD1 TCRIT Threshold R/W 64 TCRIT_RTD1 3B RTD2 TCRIT Threshold R/W 64 TCRIT_RTD2 3C RTD3 TCRIT Threshold R/W 64 TCRIT_RTD3 3D LTD TCRIT Threshold R/W 64 TCRIT_LTD 3E DTS TCRIT Threshold R/W 64 TCRIT_DTS 3F Vsen1 High Limit Low Byte R/W FF VSEN1_HL[7:0] 40 Vsen1 Low Limit low Byte R/W 00 VSEN1_LL[7:0] R/W FF VSEN2_HL[7:0] R/W 00 VSEN2_LL[7:0] R/W FF VSEN3_HL[7:0] 44 Vsen3 Low Limit low Byte R/W 00 VSEN3_LL[7:0] 45 VCC High limit low byte R/W FF VCC_HL[7:0] 46 VCC Low limit low byte R/W 00 VCC_LL[7:0] 47 VSEN high Byte 1 41 42 43 Vsen2 High Limit low Byte Vsen2 Low Limit low sByte Vsen3 High Limit low Byte R/W CC 6 5 4 3 2 1 RSV EnLTD 0 START RTD3_MD RTD2_MD RSV RTD1_MD EnPECI1 EnPECI0 RSV EnFan3 SYS3 EnFan2 EnFan1 EnVCore EnVCC SYS2 SYS1 SetResetTime ResetLimit[7:0] ResetLimit[9:8] RSV ALERT_S TCRIT_B SMI_MO OVT_MO SMI_POL MI_Sel EEP_Sel D D VSEN1_HL[9:8] VSEN1_LL[9:8] - 18 - En_SMI VSEN2_HL[9:8] TempSmiMode VSEN2_LL[9:8] Feb, 2012 Version: 1.2 NCT7802Y Idx Register Name 48 VSEN high Byte 2 49 FANIN1 Limit low Byte R/W FF FANIN1_HL[7:0] 4A FANIN2 Limit low Byte R/W FF FANIN2_HL[7:0] 4B FANIN3 Limit low Byte R/W FF FANIN3_HL[7:0] 4C FANIN1 Limit high byte R/W F8 FANIN1_HL[12:8] RSV 4D FANIN2 Limit high byte R/W F8 FANIN2_HL[12:8] RSV 4E FANIN3 Limit high byte R/W F8 FANIN3_HL[12:8] RSV 4F 50 51 52 Alert Mask function Alert / SMI Mask Temp Channel Alert / SMI Mask FAN Channel SMI Mask Voltage Channel Att Df R/W CC R/W 7F R/W 3F R/W 07 R/W 8F 7 6 VSEN3_HL[9:8] TCRIT Mask R/W BF 54 GPIO Alert Mask R/W 3F 55 GPIO Enable R/W 00 RSV 56 GPIO mode R/W 3F RSV 57 GPIO output type R/W 00 RSV 58 GPIO input data R 00 RSV 59 GPIO output data R/W 00 5A Beep voltage Enable R/W 00 5B Beep Fan Enable R/W 00 5C Beep Temp Enable R/W 00 5D Beep Enable R/W 00 5E Fan Control Output Type R/W 00 5F Fan Control Output Mode R/W 00 60 61 62 63 64 65 4 3 VSEN3_LL[9:8] GPIO6 Mode GPIO6 OB GPIO5 Mode GPIO5 OB GPIO4 Mode GPIO4 OB FANDuty2 RW 7F FANDuty3 RW 00 RW 00 RW 00 Configuration Register 2 RW 00 68 Configuration Register 3 RW 00 GPIO2 Mode GPIO2 OB GPIO1 Mode GPIO1 OB GPIO5 GPIO4 GPIO3 GPIO2 GPIO1 out out out out out EnBP_Re EnBP_VC RSV EnBP_V3 EnBP_V2 EnBP_V1 set C EnBP_Fa EnBP_Fa EnBP_Fa RSV n3 n2 n1 EnBP_Pe EnBP_Pe EnBP_LT EnBP_RT EnBP_RT EnBP_RT RSV ci1 ci0 D D3 D2 D1 EnBP_SM RSV EnBP_DF EnBP_AL EnBP_AH EnBP_TC Beep_En I EnDCFA EnDCFA RSV N2 N1 PWM3_P PWM2_P PWM1_P PWM3_O PWM2_O PWM1_O RSV RSV ol ol ol D D D 7F 67 GPIO3 Mode GPIO3 OB GPIO6 out RSV RW 00 VCC_LL[9:8] GPIO6 in GPIO5 in GPIO4 in GPIO3 in GPIO2 in GPIO1 in FANDuty1 RW 0 EnGPIO6 EnGPIO5 EnGPIO4 EnGPIO3 EnGPIO2 EnGPIO1 7F Configuration Register 1 1 VCC_HL[9:8] RW 66 2 Msk_GPI Msk_TAR RSV Msk_TC Msk_FC Msk_AH Msk_AL Msk_DF O T Msk_Peci Msk_Peci Msk_RTD Msk_RTD Msk_RTD RSV Msk_LTD 1 0 3 2 1 Msk_Fan Msk_Fan RSV Msk_Fan3 2 1 Msk_VSE Msk_VSE Msk_VSE Msk_Reset RSV Msk_VCC N3 N2 N1 Msk_Peci Msk_Peci MSk_RTD Msk_RTD Msk_RTD Msk_ALL RSV Msk_LTD 1 0 3 2 1 Msk_GPI Msk_GPI Msk_GPI Msk_GPI Msk_GPI Msk_GPI RSV O6 O5 O4 O3 O2 O1 53 Fan Control 1 Output Value Fan Control 2 Output Value Fan Control 3 Output Value Close-Loop Fan Control RPM mode Register and Configure Register of PECI Error Temperature to Fan mapping Relationships Temperature to Fan mapping Relationships 5 TwoDimension RSV RPM_HIGH_EN Temp2FanSelect RSV RSV Temp2_Sh are_En Temp2_Share_Sel RSV RSV Temp2_Sour_Sel - 19 - PECIERR Temp1FanSelect Temp3FanSelect Temp1_S hare_En Temp3_S hare_En RSV Temp1_Share_Sel Temp3_Share_Sel Temp1_Sour_Sel Feb, 2012 Version: 1.2 NCT7802Y Idx Register Name Att Df Configuration Register 4 Close-Loop Fan Control 6D RPM mode Tolerance RW 00 RW 02 6E Fanctl Step Up Time RW 0A UpTime 6F Fanctl Step Down Time RW 0A DownTime 70 DefaultFanSpeed RW 7F DefaultFanSpeed 69 7 6 5 4 3 2 RSV 1 Temp3_Sour_Sel RSV Generic_Tol_RPM FanOutDivi 84 sor1[7] FanOutDivi 84 sor2[7] FanOutDivi 84 sor3[7] 71 PWM1 Prescalar RW 72 PWM2 Prescalar RW 73 PWM3 Prescalar RW 74 Temp1 Hystersis RW 53 RSV Criti_HysT1 RSV Oper_HysT1 75 Temp2 Hystersis RW 53 RSV Criti_HysT2 RSV Oper_HysT2 76 Temp3 Hystersis RW 53 RSV Criti_HysT3 RSV Oper_HysT3 77 Fanctl Start Duty Cycle RW 30 StartDutyCycle 78 Stop Time of Fanctl RW FF StopTime 79 NonStop Enable RW 00 7A Fan Output Min Value when PECI Error RW 80 MinDuty_PECIERR 80 Table 1 Transition Point 1 RW 19 Temp1Table_TR1 81 Table 1 Transition Point 2 RW 23 Temp1Table_TR2 82 Table 1 Transition Point 3 RW 2D Temp1Table_TR3 83 Table 1 Transition Point 4 RW 37 Temp1Table_TR4 84 RW 3C Temp1Table_TRCritical RW 8C Temp1Table_FL1 RW AA Temp1Table_FL2 RW C8 Temp1Table_FL3 RW E6 Temp1Table_FL4 90 Table 2 Transition Point 1 RW 19 Temp2Table_TR1 91 Table 2 Transition Point 2 RW 23 Temp2Table_TR2 92 Table 2 Transition Point 3 RW 2D Temp2Table_TR3 93 Table 2 Transition Point 4 RW 37 Temp2Table_TR4 94 RW 3C Temp2Table_TRCritical RW 8C Temp2Table_FL1 RW AA Temp2Table_FL2 RW C8 Temp2Table_FL3 RW E6 Temp2Table_FL4 A0 Table 3 Transition Point 1 RW 19 Temp3Table_TR1 A1 Table 3 Transition Point 2 RW 23 Temp3Table_TR2 Table 1 Critical Point Table 1 Y-axis Transition Point 1 Table 1 Y-axis Transition 86 Point 2 Table 1 Y-axis Transition 87 Point 3 Table 1 Y-axis Transition 88 Point 4 85 Table 2 Critical Point Table 2 Y-axis Transition Point 1 Table 2 Y-axis Transition 96 Point 2 Table 2 Y-axis Transition 97 Point 3 Table 2 Y-axis Transition 98 Point 4 95 FanOutDivisor1[6:0] FanOutDivisor2[6:0] FanOutDivisor3[6:0] RSV - 20 - NonStop Feb, 2012 Version: 1.2 0 NCT7802Y Idx Att Df A2 Table 3 Transition Point 3 RW 2D Temp3Table_TR3 A3 Table 3 Transition Point 4 RW 37 Temp3Table_TR4 A4 RW 3C Temp3Table_TRCritical RW 8C Temp3Table_FL1 RW AA Temp3Table_FL2 RW C8 Temp3Table_FL3 RW E6 Temp3Table_FL4 A5 A6 A7 A8 Register Name Table 3 Critical Point Table 3 Y-axis Transition Point 1 Table 3 Y-axis Transition Point 2 Table 3 Y-axis Transition Point 3 Table 3 Y-axis Transition Point 4 7 6 5 4 3 2 1 C1 TD1 Offset R/W 3D RSV Offset_TD1 C2 TD2 Offset R/W 3D RSV Offset_TD2 C4 TR1 Offset R/W 00 RSV Offset_TR1 C5 TR2 Offset R/W 00 RSV Offset_TR2 C6 TR3 Offset R/W 00 RSV Offset_TR3 CB Filter Level Select R/W 00 R/W 00 PGM_TEMP1[7:0] R/W 00 PGM_TEMP2[7:0] E3 E4 Programmable Temperature 1 Programmable Temperature 2 LDT RT3 INIT RT2 FC SOFT RESET W -- FD Vendor ID R 50 Vendor ID FE ChipID R C3 ChipID FF Version ID R 2x Version ID (x=1,2,3…) 0 RT1 RSV - 21 - Feb, 2012 Version: 1.2 NCT7802Y 7.2 BANK 0 REGISTER DETAIL 7.2.1 Bank Select Register Location : Index 00h Type : Read/Write Power on default value : 00h BIT 7 6 5 7.2.2 3 2 1 RSV NAME FUNC. 4 0 BKSEL BKSEL : Bank selection , 0=Bank0 , 1=Bank1 Remote Diode 1 Temperature Readout Register (MSB) Location : Index 01h Type : Read Only Power on default value : 00h BIT 7 6 5 7.2.3 3 2 1 0 2 1 0 2 1 0 MNTRTD1[10:3] NAME FUNC. 4 MNTRTD1[10:3] : Readout of RTD1 High Byte Remote Diode 2 Temperature Readout Register (MSB) Location : Index 02h Type : Read Only Power on default value : 00h BIT 7 6 5 7.2.4 3 MNTRTD2[10:3] NAME FUNC. 4 MNTRTD2[10:3] : Readout of RTD2 High Byte Remote Diode 3 Temperature Readout Register (MSB) Location : Index 03h Type : Read Only Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 MNTRTD3[10:3] MNTRTD3[10:3] : Readout of RTD3 High Byte - 22 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.5 Local Diode Temperature Readout Register (MSB) Location : Index 04h Type : Read Only Power on default value : 00h BIT 7 6 5 4 7.2.6 2 1 0 2 1 0 2 1 0 2 1 0 MNTLTD[7:0] NAME FUNC. 3 MNTLTD[7:0] : Readout of LTD Temperature Temperature Readout Register (LSB) Location : Index 05h Type : Read Only Power on default value : 00h BIT 7 7.2.7 5 4 3 MNTTD_LSB[2:0] NAME FUNC. 6 RSV MNTTD_LSB[2:0] : Readout of TD Low Byte PECI 0 Temperature Readout Register (MSB) Location : Index 06h Type : Read Only Power on default value : 00h BIT 7 6 5 7.2.8 3 MNTPECI0[9:2] NAME FUNC. 4 MNTPECI0[9:2] : Readout of PECI0 High Byte PECI 1 Temperature Readout Register (MSB) Location : Index 07h Type : Read Only Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 MNTPECI1[9:2] MNTPECI1[9:2] : Readout of PECI1 High Byte - 23 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.9 Read PECI Temperature Readout Register (LSB) Location : Index 08h Type : Read Only Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 MNTPECI_LSB[1:0] 2 1 0 2 1 0 2 1 0 2 1 0 RSV MNTPECI_LSB[1:0] : Readout of PECI Low Byte 7.2.10 VCC Readout Register (MSB) Location : Index 09h Type : Read Only Power on default value : 00h BIT 7 6 5 3 MNTVCC[9:2] NAME FUNC. 4 MNTVCC[9:2] : Readout of VCC High Byte 7.2.11 VCore Readout Register (MSB) Location : Index 0Ah Type : Read Only Power on default value : 00h BIT 7 6 5 3 MNTVCore[9:2] NAME FUNC. 4 MNTVCore[9:2] : Readout of VCore High Byte 7.2.12 VSEN1 Readout Register (MSB) Location : Index 0Ch Type : Read Only Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 MNTVSEN1[9:2] MNTVSEN1[9:2] : Readout of VSEN1 High Byte - 24 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.13 VSEN2 Readout Register (MSB) Location : Index 0Dh Type : Read Only Power on default value : 00h BIT 7 6 5 3 2 1 0 2 1 0 2 1 0 2 1 0 MNTVSEN2[9:2] NAME FUNC. 4 MNTVSEN2[9:2] : Readout of VSEN2 High Byte 7.2.14 VSEN3 Readout Register (MSB) Location : Index 0Eh Type : Read Only Power on default value : 00h BIT 7 6 5 3 MNTVSEN3[9:2] NAME FUNC. 4 MNTVSEN3[9:2] : Readout of VSEN3 High Byte 7.2.15 Voltage Readout Register (LSB) Location : Index 0Fh Type : Read Only Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 RSV MNTV_LSB[1:0] MNTV_LSB[1:0] : Readout of Voltage Low Byte 7.2.16 Fan Count 1 Readout Register (MSB) Location : Index 10h Type : Read Only Power on default value : FFh BIT 7 6 5 4 3 NAME MNTFAN1[12:5] FUNC. MNTFAN1[12:5] : Readout of Fan Count 1 High Byte - 25 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.17 Fan Count 2 Readout Register (MSB) Location : Index 11h Type : Read Only Power on default value : FFh BIT 7 6 5 4 3 NAME MNTFAN2[12:5] FUNC. MNTFAN2[12:5] : Readout of Fan Count 2 High Byte 2 1 0 2 1 0 2 1 0 7.2.18 Fan Count 3 Readout Register (MSB) Location : Index 12h Type : Read Only Power on default value : FFh BIT 7 6 5 4 3 NAME MNTFAN3[12:5] FUNC. MNTFAN3[12:5] : Readout of Fan Count 3 High Byte 7.2.19 Fan Count Readout Register (LSB) Location : Index 13h Type : Read Only Power on default value : F8h BIT 7 6 5 4 3 RSV NAME MNTFAN_LSB[4:0] FUNC. MNTFAN_LSB[4:0] : Readout of Fan Count Low Byte 7.2.20 MNTIMON Percent Register Location : Index 15h Type : Read Only Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 2 1 0 MNTIMON_Percent MNTIMON_Percent : IMON Percent, the voltage input is VCore (0.9V=100%) - 26 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.21 Diode Fault Alert Status Register Location : Index 17h Type : Read Only Power on default value : 00h BIT 7 6 5 4 3 RSV NAME 2 1 0 STS_DF3 STS_DF2 STS_DF1 STS_DF3 : 1 indicates the TD3 fault FUNC. STS_DF2 : 1 indicates the TD2 fault STS_DF1 : 1 indicates the TD1 fault 7.2.22 Temperature Low Alert Status Register Location : Index 18h Type : Read Only Power on default value : 00h BIT 7 6 RSV NAME 5 4 3 2 1 0 STS_PECI1 STS_PECI0 STS_AL4 STS_AL3 STS_AL2 STS_AL1 STS_PECI1 : 1 indicates the PECI1 over low limit STS_PECI0 : 1 indicates the PECI0 over low limit FUNC. STS_AL4 : 1 indicates the LTD over low limit STS_AL3 : 1 indicates the RTD3 over low limit STS_AL2 : 1 indicates the RTD2 over low limit STS_AL1 : 1 indicates the RTD1 over low limit 7.2.23 Temperature High Alert Status Register Location : Index 19h Type : Read Only Power on default value : 00h BIT NAME 7 6 RSV 5 4 3 2 1 0 STS_PE CI1 STS_PE CI0 STS_AH 4 STS_AH 3 STS_AH 2 STS_AH 1 STS_PECI1 : 1 indicates the PECI1 over high limit STS_PECI0 : 1 indicates the PECI0 over high limit FUNC. STS_AH4 : 1 indicates the LTD over high limit STS_AH3 : 1 indicates the RTD3 over high limit STS_AH2 : 1 indicates the RTD2 over high limit STS_AH1 : 1 indicates the RTD1 over high limit - 27 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.24 Fan Alert Status Register Location : Index 1Ah Type : Read Only Power on default value : 00h BIT 7 6 5 4 3 2 1 0 NAME RSV FAN_TAR 3 FAN_TAR 2 FAN_TAR 1 RSV FAN_FC3 FAN_FC2 FAN_FC1 FUNC. FAN_TAR3 : 1 indicates the FAN3 is drived to fully speed over 3 minutes FAN_TAR2 : 1 indicates the FAN2 is drived to fully speed over 3 minutes FAN_TAR1 : 1 indicates the FAN1 is drived to fully speed over 3 minutes FAN_FC3 : 1 indicates the FAN3 over limit. FAN_FC2 : 1 indicates the FAN2 over limit FAN_FC1 : 1 indicates the FAN1 over limit 7.2.25 T_CRIT# Alert Status Register Location : Index 1Bh Type : Read Only Power on default value : 00h BIT 7 RSV NAME FUNC. 6 5 4 3 2 1 0 STS_PE CI1 STS_PE CI0 STS_TC4 STS_TC3 STS_TC2 STS_TC1 STS_PECI1 : 1 indicates the PECI1 T_CRIT# asserts STS_PECI0 : 1 indicates the PECI0 T_CRIT# asserts STS_TC4 : 1 indicates the LTD T_CRIT# asserts STS_TC3 : 1 indicates the RTD3 T_CRIT# asserts STS_TC2 : 1 indicates the RTD2 T_CRIT# asserts STS_TC1 : 1 indicates the RTD1 T_CRIT# asserts 7.2.26 GPIO Alert Status Register Location : Index 1Ch Type : Read Only Power on default value : 00h BIT NAME FUNC. 7 6 RSV 5 4 3 2 1 0 STS_GPIO 6 STS_GPIO 5 STS_GPIO 4 STS_GPIO 3 STS_GPIO 2 STS_GPIO 1 STS_GPIO6 : 1 indicates the GPIO6 event asserts STS_GPIO5 : 1 indicates the GPIO5 event asserts STS_GPIO4 : 1 indicates the GPIO4 event asserts STS_GPIO3 : 1 indicates the GPIO3 event asserts STS_GPIO2 : 1 indicates the GPIO2 event asserts STS_GPIO1 : 1 indicates the GPIO1 event asserts - 28 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.27 Temperature SMI Status Register Location : Index 1Dh Type : Read Only Power on default value : 00h BIT 7 RSV NAME FUNC. 6 5 4 3 2 1 0 STS_PE CI1 STS_PE CI0 STS_LT D4 STS_RT D3 STS_RT D2 STS_RT D1 STS_PECI1 : 1 indicates the PECI1 SMI event asserts STS_PECI0 : 1 indicates the PECI0 SMI event asserts STS_LTD : 1 indicates the LTD SMI event asserts STS_RTD3 : 1 indicates the RTD3 SMI event asserts STS_RTD2 : 1 indicates the RTD2 SMI event asserts STS_RTD1 : 1 indicates the RTD1 SMI event asserts 7.2.28 Voltage SMI Status Register Location : Index 1Eh Type : Read Only Power on default value : 00h BIT 7 6 NAME 5 4 RSV 3 2 1 0 STS_VCC STS_VSEN3 STS_VSEN2 STS_VSEN1 STS_VCC : 1 indicates the VCC over limit FUNC. STS_VSEN3 : 1 indicates the VSEN3 over limit STS_VSEN2 : 1 indicates the VSEN2 over limit STS_VSEN1 : 1 indicates the VSEN1 over limit 7.2.29 Fan SMI Status Register Location : Index 1Fh Type : Read Only Power on default value : 00h BIT 7 6 5 4 3 2 1 0 NAME RSV FAN_TA R3 FAN_TA R2 FAN_TA R1 RSV FAN_FC 3 FAN_FC 2 FAN_FC 1 FAN_TAR3 : 1 indicates the FAN3 is drived to fully speed over 3 minutes FAN_TAR3 : 1 indicates the FAN2 is drived to fully speed over 3 minutes FUNC. FAN_TAR3 : 1 indicates the FAN1 is drived to fully speed over 3 minutes FAN_FC3 : 1 indicates the FAN3 over limit FAN_FC2 : 1 indicates the FAN2 over limit FAN_FC1 : 1 indicates the FAN1 over limit - 29 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.30 T_CRIT# Real Time Status Register Location : Index 20h Type : Read Only Power on default value : 00h BIT 7 6 4 RSV NAME FUNC. 5 3 2 1 0 LTD_Texc RTD3_Texc RTD2_Texc RTD1_Texc LTD_Texc : 1 indicates the LTD over the shutdown threshold RTD3_Texc : 1 indicates the RTD3 over the shutdown threshold RTD2_Texc : 1 indicates the RTD2 over the shutdown threshold RTD1_Texc : 1 indicates the RTD1 over the shutdown threshold 7.2.31 Start Register Location : Index 21h Type : Read/Write Power on default value : 01h BIT 7 NAME MSK_ALERT FUNC. 6 5 4 3 2 1 RSV 0 START MSK_ALERT : 1 indicates the ALERT# output is masked START : 1 indicates the ADC is operating 7.2.32 Mode Selection Register Location : Index 22h Type : Read/Write Power on default value : 7Fh BIT 7 6 NAME RSV EnLTD FUNC. 5 4 3 RTD3_MD 2 1 RTD2_MD 0 RTD1_MD EnLTD : 1 indicates the LTD function enabled RTD3_MD : 00=Closed , 01=Reserved , 10=Thermistor mode , 11=Voltage sense RTD2_MD : 00=Closed , 01=Current mode , 10=Thermistor mode , 11=Voltage sense RTD1_MD : 00=Closed , 01=Current mode , 10=Thermistor mode , 11=Voltage sense 7.2.33 PECI Enable Register Location : Index 23h Type : Read/Write Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 RSV 2 1 0 EnPECI1 EnPECI0 EnPECI1 : 1 indicates the PECI1 enabled EnPECI0 : 1 indicates the PECI0 enabled - 30 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.34 Fan Enable Register Location : Index 24h Type : Read/Write Power on default value : 07h BIT 7 6 NAME 5 4 3 RSV 2 1 0 EnFan3 EnFan2 EnFan1 2 1 0 EnVCore EnVCC 1 0 EnFan3 : 1 indicates the FANIN3 enabled FUNC. EnFan2 : 1 indicates the FANIN2 enabled EnFan1 : 1 indicates the FANIN1 enabled 7.2.35 Voltage Monitor Enable Register Location : Index 25h Type : Read/Write Power on default value : 03h BIT 7 6 5 NAME FUNC. 4 3 RSV EnVCore : 1 indicates the VCore enabled EnVCC : 1 indicates the VCC enabled 7.2.36 Conversion Rate Register Location : Index 26h Type : Read/Write Power on default value : 03h BIT 7 6 5 3 2 RSV NAME FUNC. 4 ConvRate[1:0] ConvRate[1:0] : 00=1Hz , 01=2Hz , 10= 4Hz , 11=Free Run 7.2.37 Fault Queue Register Location : Index 27h Type : Read/Write Power on default value : 03h BIT NAME FUNC. 7 6 5 4 3 RSV 2 1 0 FaultQueue[1:0] FaultQueue[1:0] : Fault Queue of Thermal Shutdown , 00=1 , 01=2 , 10=3 , 11=4 - 31 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.38 Alert# High Limit Link to T_CRIT# Register Location : Index 28h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME 4 3 RSV 2 1 0 SYS3 SYS2 SYS1 SYS3 : 1 indicates the External Diode3 channel high limit will be linked to T_CRIT# FUNC. SYS2 : 1 indicates the External Diode2 channel high limit will be linked to T_CRIT# SYS1 : 1 indicates the External Diode1 channel high limit will be linked to T_CRIT# 7.2.39 Reset Time Setting Register Location : Index 29h Type : Read/Write Power on default value : 04h BIT 7 6 5 NAME FUNC. 4 3 2 RSV 1 0 SetResetTime SetResetTime : 000=1ms , 001=12.5ms , 010=50ms , 011=100ms 100=200ms , 101=400ms , 110=800ms , 111=1600ms 7.2.40 Reset Limit Low Byte Register Location : Index 2Ah Type : Read/Write Power on default value : EEh BIT 7 6 5 3 2 1 0 2 1 0 ResetLimit[7:0] NAME FUNC. 4 ResetLimit[7:0] : Reset Limit Low Byte 7.2.41 Reset Limit High Byte Register Location : Index 2Bh Type : Read/Write Power on default value : 80h BIT NAME FUNC. 7 6 5 4 3 RSV ResetLimit[9:8] ResetLimit[9:8] : Reset Limit High Byte The Reset voltage threshold formula = Vreset-thd / 0.004 For example, the Reset voltage shreshold is 3.0V, the registers setting will be: 3.0 / 0.004 = 750, the Index[2Bh]=80h, Index[2Ah]=EEh. - 32 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.42 SMI# Control Register Location : Index 2Fh Type : Read/Write Power on default value : 00h BIT 7 6 5 4 3 2 NAME ALERT_ SMI_Sel TCRIT_B EEP_Sel SMI_MO D SMI_POL TCRIT_M OD En_SMI 1 0 TempSmiMode ALERT_SMI_Sel : 0= ALERT , 1= SMI TCRIT_BEEP_Sel : 0= TCRIT , 1= BEEP SMI_MOD : 1= Level mode, 0= Pulse mode (Pulse width is 200uS) FUNC. SMI_POL : Refer to below table. TCRIT_MOD : 0= Active low , 1= Active high En_SMI : 0= Disable , 1= Enable SMI TempSmiMode : 00= Comparator mode , 01= One time mode 10= Two times mode , 11= Two times mode SMI_MD SMI_POL SMI# 0 0 Low pulse 0 1 High pulse 1 0 High level 1 1 Low level 7.2.43 RTD1 Temperature High Limit Register Location : Index 30h Type : Read/Write Power on default value : 55h BIT 7 6 5 4 2 1 0 RTD1_HL NAME FUNC. 3 RTD1_HL : RTD1 Temperature High Limit setting for ALERT# and SMI# 7.2.44 RTD1 Temperature Low Limit Register Location : Index 31h Type : Read/Write Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 2 1 0 RTD1_LL RTD1_LL : RTD1 Temperature Low Limit setting for ALERT# and SMI# - 33 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.45 RTD2 Temperature High Limit Register Location : Index 32h Type : Read/Write Power on default value : 55h BIT 7 6 5 4 2 1 0 RTD2_HL NAME FUNC. 3 RTD2_HL : RTD2 Temperature High Limit setting for ALERT# and SMI# 7.2.46 RTD2 Temperature Low Limit Register Location : Index 33h Type : Read/Write Power on default value : 00h BIT 7 6 5 4 2 1 0 1 0 RTD2_LL NAME FUNC. 3 RTD2_LL : RTD2 Temperature Low Limit setting for ALERT# and SMI# 7.2.47 RTD3 Temperature High Limit Register Location : Index 34h Type : Read/Write Power on default value : 55h BIT 7 6 5 4 2 RTD3_HL NAME FUNC. 3 RTD3_HL : RTD3 Temperature High Limit setting for ALERT# and SMI# 7.2.48 RTD3 Temperature Low Limit Register Location : Index 35h Type : Read/Write Power on default value : 00h BIT 7 6 5 4 2 1 0 1 0 RTD3_LL NAME FUNC. 3 RTD3_LL : RTD3 Temperature Low Limit setting for ALERT# and SMI# 7.2.49 LTD Temperature High Limit Register Location : Index 36h Type : Read/Write Power on default value : 55h BIT NAME FUNC. 7 6 5 4 3 2 LTD_HL LTD_HL : LTD Temperature High Limit setting for ALERT# and SMI# - 34 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.50 LTD Temperature Low Limit Register Location : Index 37h Type : Read/Write Power on default value : 00h BIT 7 6 5 4 2 1 0 1 0 1 0 2 1 0 2 1 0 LTD_LL NAME FUNC. 3 LTD_LL : LTD Temperature Low Limit setting for ALERT# and SMI# 7.2.51 DTS Temperature High Limit Register Location : Index 38h Type : Read/Write Power on default value : 55h BIT 7 6 5 4 2 DTS_HL NAME FUNC. 3 DTS_HL : DTS Temperature High Limit setting for ALERT# and SMI# 7.2.52 DTS Temperature Low Limit Register Location : Index 39h Type : Read/Write Power on default value : 00h BIT 7 6 5 4 2 DTS_LL NAME FUNC. 3 DTS_LL : DTS1 Temperature Low Limit setting for ALERT# and SMI# 7.2.53 RTD1 TCRIT Threshold Register Location : Index 3Ah Type : Read/Write Power on default value : 64h BIT 7 6 5 3 TCRIT_RTD1 NAME FUNC. 4 TCRIT_RTD1 : RTD1 Temperature Threshold of T_CRIT# 7.2.54 RTD2 TCRIT Threshold Register Location : Index 3Bh Type : Read/Write Power on default value : 64h BIT NAME FUNC. 7 6 5 4 3 TCRIT_RTD2 TCRIT_RTD2 : RTD2 Temperature Threshold of T_CRIT# - 35 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.55 RTD3 TCRIT Threshold Register Location : Index 3Ch Type : Read/Write Power on default value : 64h BIT 7 6 5 4 2 1 0 2 1 0 2 1 0 2 1 0 2 1 0 TCRIT_RTD3 NAME FUNC. 3 TCRIT_RTD3 : RTD3 Temperature Threshold of T_CRIT# 7.2.56 LTD TCRIT Threshold Register Location : Index 3Dh Type : Read/Write Power on default value : 64h BIT 7 6 5 4 TCRIT_LTD NAME FUNC. 3 TCRIT_LTD : LTD Temperature Threshold of T_CRIT# 7.2.57 DTS TCRIT Threshold Register Location : Index 3Eh Type : Read/Write Power on default value : 64h BIT 7 6 5 4 TCRIT_DTS NAME FUNC. 3 TCRIT_DTS : DTS Temperature Threshold of T_CRIT# 7.2.58 VSEN1 High Limit Low Byte Register Location : Index 3Fh Type : Read/Write Power on default value : FFh BIT 7 6 5 3 VSEN1_HL[7:0] NAME FUNC. 4 VSEN1_HL : VSEN1 High Limit Low Byte 7.2.59 VSEN1 Low Limit Low Byte Register Location : Index 40h Type : Read/Write Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 VSEN1_LL[7:0] VSEN1_LL : VSEN1 Low Limit Low Byte - 36 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.60 VSEN2 High Limit Low Byte Register Location : Index 41h Type : Read/Write Power on default value : FFh BIT 7 6 5 3 2 1 0 2 1 0 2 1 0 2 1 0 2 1 0 VSEN2_HL[7:0] NAME FUNC. 4 VSEN2_HL : VSEN2 High Limit Low Byte 7.2.61 VSEN2 Low Limit Low Byte Register Location : Index 42h Type : Read/Write Power on default value : 00h BIT 7 6 5 3 VSEN2_LL[7:0] NAME FUNC. 4 VSEN2_LL : VSEN2 Low Limit Low Byte 7.2.62 VSEN3 High Limit Low Byte Register Location : Index 43h Type : Read/Write Power on default value : FFh BIT 7 6 5 3 VSEN3_HL[7:0] NAME FUNC. 4 VSEN3_HL : VSEN3 High Limit Low Byte 7.2.63 VSEN3 Low Limit Low Byte Register Location : Index 44h Type : Read/Write Power on default value : 00h BIT 7 6 5 3 VSEN3_LL[7:0] NAME FUNC. 4 VSEN3_LL : VSEN3 Low Limit Low Byte 7.2.64 VCC High Limit Low Byte Register Location : Index 45h Type : Read/Write Power on default value : FFh BIT 7 6 5 3 VCC_HL[7:0] NAME FUNC. 4 VCC_HL : VCC High Limit Low Byte - 37 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.65 VCC Low Limit Low Byte Register Location : Index 46h Type : Read/Write Power on default value : 00h BIT 7 6 5 3 2 1 0 2 1 0 VCC_LL[7:0] NAME FUNC. 4 VCC_LL : VCC Low Limit Low Byte 7.2.66 VSEN Limit High Byte 1 Register Location : Index 47h Type : Read/Write Power on default value : CCh BIT NAME 7 6 VSEN1_HL[9:8] 5 4 3 VSEN1_LL[9:8] VSEN2_HL[9:8] VSEN2_LL[9:8] VSEN1_HL[9:8] : VSEN1 High Limit High Byte FUNC. VSEN1_LL[9:8] : VSEN1 Low Limit High Byte VSEN2_HL[9:8] : VSEN2 High Limit High Byte VSEN2_LL[9:8] : VSEN2 Low Limit High Byte 7.2.67 VSEN Limit High Byte 2 Register Location : Index 48h Type : Read/Write Power on default value : CCh BIT NAME 7 6 VSEN3_HL[9:8] 5 4 3 VSEN3_LL[9:8] 2 1 0 VCC_HL[9:8] VCC_LL[9:8] 3 1 VSEN3_HL[9:8] : VSEN3 High Limit High Byte FUNC. VSEN3_LL[9:8] : VSEN3 Low Limit High Byte VCC_HL[9:8] : VCC High Limit High Byte VCC_LL[9:8] : VCC Low Limit High Byte 7.2.68 FANIN1 Limit Low Byte Register Location : Index 49h Type : Read/Write Power on default value : FFh BIT NAME FUNC. 7 6 5 4 2 0 FANIN1_HL[7:0] FANIN1_HL[7:0] : FANIN1 Limit Low Byte - 38 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.69 FANIN2 Limit Low Byte Register Location : Index 4Ah Type : Read/Write Power on default value : FFh BIT 7 6 5 3 2 1 0 2 1 0 2 1 0 FANIN2_HL[7:0] NAME FUNC. 4 FANIN2_HL[7:0] : FANIN2 Limit Low Byte 7.2.70 FANIN3 Limit Low Byte Register Location : Index 4Bh Type : Read/Write Power on default value : FFh BIT 7 6 5 3 FANIN3_HL[7:0] NAME FUNC. 4 FANIN3_HL[7:0] : FANIN3 Limit Low Byte 7.2.71 FANIN1 Limit High Byte Register Location : Index 4Ch Type : Read/Write Power on default value : F8h BIT 7 6 4 3 FANIN1_HL[12:8] NAME FUNC. 5 RSV FANIN1_HL[12:8] : FANIN1 Limit High Byte 7.2.72 FANIN2 Limit High Byte Register Location : Index 4Dh Type : Read/Write Power on default value : F8h BIT NAME FUNC. 7 6 5 4 3 FANIN2_HL[12:8] 2 1 0 RSV FANIN2_HL[12:8] : FANIN2 Limit High Byte - 39 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.73 FANIN3 Limit High Byte Register Location : Index 4Eh Type : Read/Write Power on default value : F8h BIT 7 6 4 3 2 1 FANIN3_HL[12:8] NAME FUNC. 5 0 RSV FANIN3_HL[12:8] : FANIN3 Limit High Byte 7.2.74 ALERT Mask Register Register Location : Index 4Fh Type : Read/Write Power on default value : 7Fh BIT 7 6 5 4 3 2 1 0 NAME RSV MSK_TC MSK_GP IO MSK_TA RT MSK_FC MSK_AH MSK_AL MSK_DF MSK_TC : 1 indicates the ALERT# from T_CRIT event will be masked MSK_GPIO : 1 indicates the ALERT# from GPIO event will be masked MSK_TART : 1 indicates the ALERT# from TART event will be masked FUNC. MSK_FC : 1 indicates the ALERT# from FAN event will be masked MSK_AH : 1 indicates the ALERT# from High ALERT event will be masked MSK_AL : 1 indicates the ALERT# from Low ALERT event will be masked MSK_DF : 1 indicates the ALERT# from Diode Fault event will be masked 7.2.75 ALERT/SMI Mask Temperature Channel Register Location : Index 50h Type : Read/Write Power on default value : 3Fh BIT NAME 7 6 RSV 5 4 3 2 1 0 MSK_PE CI1 MSK_PE CI0 MSK_LT D MSK_RT D3 MSK_RT D2 MSK_RT D1 MSK_PECI1 : 1 indicates the ALERT#/SMI from PECI1 event will be masked MSK_PECI0 : 1 indicates the ALERT#/SMI from PECI0 event will be masked FUNC. MSK_LTD : 1 indicates the ALERT#/SMI from LTD event will be masked MSK_RTD3 : 1 indicates the ALERT#/SMI from RTD3 event will be masked MSK_RTD2 : 1 indicates the ALERT#/SMI from RTD2 event will be masked MSK_RTD1 : 1 indicates the ALERT#/SMI from RTD1 event will be masked - 40 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.76 ALERT/SMI Mask Fan Channel Register Location : Index 51h Type : Read/Write Power on default value : 07h BIT 7 6 5 4 3 RSV NAME 2 1 0 MSK_FA N3 MSK_FA N2 MSK_FA N1 MSK_FAN3 : 1 indicates the ALERT#/SMI from FAN3/TART3 event will be masked FUNC. MSK_FAN2 : 1 indicates the ALERT#/SMI from FAN2/TART2 event will be masked MSK_FAN1 : 1 indicates the ALERT#/SMI from FAN1/TART1 event will be masked 7.2.77 SMI Mask Voltage Channel Register Location : Index 52h Type : Read/Write Power on default value : 8Fh BIT 7 NAME MSK_RE SET 6 5 4 RSV 3 2 1 0 MSK_VC C MSK_VS EN3 MSK_VS EN2 MSK_VS EN1 MSK_RESET : 1 indicates the RESET# (Pin 6)output will be masked MSK_VCC : 1 indicates the SMI from VCC event will be masked FUNC. MSK_VSEN3 : 1 indicates the SMI from VSEN3 event will be masked MSK_VSEN2 : 1 indicates the SMI from VSEN2 event will be masked MSK_VSEN1 : 1 indicates the SMI from VSEN1 event will be masked 7.2.78 T_CRIT# Mask Register Location : Index 53h Type : Read/Write Power on default value : BFh BIT 7 6 5 4 3 2 1 0 NAME MSK_AL L RSV MSK_PE CI1 MSK_PE CI0 MSK_LT D4 MSK_RT D3 MSK_RT D2 MSK_RT D1 MSK_ALL : 1 indicates the T_CRIT# from ALL event will be masked MSK_PECI1 : 1 indicates the T_CRIT# from PECI1 event will be masked MSK_PECI0 : 1 indicates the T_CRIT# from PECI0 event will be masked FUNC. MSK_LTD : 1 indicates the T_CRIT# from LTD event will be masked MSK_RTD3 : 1 indicates the T_CRIT# from RTD3 event will be masked MSK_RTD2 : 1 indicates the T_CRIT# from RTD2 event will be masked MSK_RTD1 : 1 indicates the T_CRIT# from RTD1 event will be masked - 41 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.79 GPIO Alert Mask Register Location : Index 54h Type : Read/Write Power on default value : 3Fh BIT 7 6 RSV NAME 5 4 3 2 1 0 MSK_GP IO6 MSK_GP IO5 MSK_GP IO4 MSK_GP IO3 MSK_GP IO2 MSK_GP IO1 MSK_GPIO6 : 1 indicates the ALERT# from GPIO6 event will be masked MSK_GPIO5 : 1 indicates the ALERT# from GPIO5 event will be masked FUNC. MSK_GPIO4 : 1 indicates the ALERT# from GPIO4 event will be masked MSK_GPIO3 : 1 indicates the ALERT# from GPIO3 event will be masked MSK_GPIO2 : 1 indicates the ALERT# from GPIO2 event will be masked MSK_GPIO1 : 1 indicates the ALERT# from GPIO1 event will be masked 7.2.80 GPIO Enable Register Location : Index 55h Type : Read/Write Power on default value : 00h BIT 7 NAME 6 RSV 5 4 3 2 1 0 EnGPIO6 EnGPIO5 EnGPIO4 EnGPIO3 EnGPIO2 EnGPIO1 EnGPIO6 : 1 indicates the GPIO6 enabled EnGPIO5 : 1 indicates the GPIO5 enabled FUNC. EnGPIO4 : 1 indicates the GPIO4 enabled EnGPIO3 : 1 indicates the GPIO3 enabled EnGPIO2 : 1 indicates the GPIO2 enabled EnGPIO1 : 1 indicates the GPIO1 enabled 7.2.81 GPIO Mode Register Location : Index 56h Type : Read/Write Power on default value : 3Fh BIT NAME 7 6 RSV 5 4 3 2 1 0 GPIO6 Mode GPIO5 Mode GPIO4 Mode GPIO3 Mode GPIO2 Mode GPIO1 Mode GPIO6 Mode : 0= Input , 1= Output GPIO5 Mode : 0= Input , 1= Output FUNC. GPIO4 Mode : 0= Input , 1= Output GPIO3 Mode : 0= Input , 1= Output GPIO2 Mode : 0= Input , 1= Output GPIO1 Mode : 0= Input , 1= Output - 42 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.82 GPIO Output Type Register Location : Index 57h Type : Read/Write Power on default value : 00h BIT 7 6 RSV NAME 5 4 3 2 1 0 GPIO6 OB GPIO5 OB GPIO4 OB GPIO3 OB GPIO2 OB GPIO1 OB GPIO6 Output Type : 0= Push Pull , 1= Open Drain GPIO5 Output Type : 0= Push Pull , 1= Open Drain FUNC. GPIO4 Output Type : 0= Push Pull , 1= Open Drain GPIO3 Output Type : 0= Push Pull , 1= Open Drain GPIO2 Output Type : 0= Push Pull , 1= Open Drain GPIO1 Output Type : 0= Push Pull , 1= Open Drain 7.2.83 GPIO Input Data Register Location : Index 58h Type : Read Only Power on default value : 00h BIT 7 NAME 6 RSV 5 4 3 2 1 0 GPIO6 IN GPIO5 IN GPIO4 IN GPIO3 IN GPIO2 IN GPIO1 IN GPIO6 IN : Input data register of GPIO6 GPIO5 IN : Input data register of GPIO5 FUNC. GPIO4 IN : Input data register of GPIO4 GPIO3 IN : Input data register of GPIO3 GPIO2 IN : Input data register of GPIO2 GPIO1 IN : Input data register of GPIO1 7.2.84 GPIO Output Data Register Location : Index 59h Type : Read/Write Power on default value : 00h BIT NAME 7 6 RSV 5 4 3 2 1 0 GPIO6 OUT GPIO5 OUT GPIO4 OUT GPIO3 OUT GPIO2 OUT GPIO1 OUT GPIO6 OUT : Output data register of GPIO6 GPIO5 OUT : Output data register of GPIO5 FUNC. GPIO4 OUT : Output data register of GPIO4 GPIO3 OUT : Output data register of GPIO3 GPIO2 OUT : Output data register of GPIO2 GPIO1 OUT : Output data register of GPIO1 - 43 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.85 BEEP Voltage Channel Enable Register Location : Index 5Ah Type : Read/Write Power on default value : 00h BIT 7 6 5 RSV NAME 4 3 2 1 0 EnBP_R ESET EnBP_V CC EnBP_V SEN3 EnBP_V SEN2 EnBP_V SEN1 EnBP_RESET : 1 indicates the BEEP is enabled for RESET event EnBP_VCC : 1 indicates the BEEP is enabled for VCC event FUNC. EnBP_VSEN3 : 1 indicates the BEEP is enabled for VSEN3 event EnBP_VSEN2 : 1 indicates the BEEP is enabled for VSEN2 event EnBP_VSEN1 : 1 indicates the BEEP is enabled for VSEN1 event 7.2.86 BEEP Fan Channel Enable Register Location : Index 5Bh Type : Read/Write Power on default value : 00h BIT 7 6 5 4 3 RSV NAME 2 1 0 EnBP_FAN3 EnBP_FAN2 EnBP_FAN1 EnBP_FAN3 : 1 indicates the BEEP is enabled for FAN3 event FUNC. EnBP_FAN2 : 1 indicates the BEEP is enabled for FAN2 event EnBP_FAN1 : 1 indicates the BEEP is enabled for FAN1 event 7.2.87 BEEP Temperature Channel Enable Register Location : Index 5Ch Type : Read/Write Power on default value : 00h BIT NAME 7 6 RSV 5 4 3 2 1 0 EnBP_P ECI1 EnBP_P ECI0 EnBP_L TD ENBP_R TD3 EnBP_R TD2 EnBP_R TD1 EnBP_PECI1 : 1 indicates the BEEP is enabled for PECI1 event EnBP_PECI0 : 1 indicates the BEEP is enabled for PECI0 event FUNC. EnBP_LTD : 1 indicates the BEEP is enabled for LTD event EnBP_RTD3 : 1 indicates the BEEP is enabled for RTD3 event EnBP_RTD2 : 1 indicates the BEEP is enabled for RTD2 event EnBP_RTD1 : 1 indicates the BEEP is enabled for RTD1 event - 44 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.88 BEEP Enable Register Location : Index 5Dh Type : Read/Write Power on default value : 00h BIT 7 6 NAME FUNC. RSV 5 4 3 2 1 0 EnBP_SMI EnBP_DF EnBP_AL ENBP_AH EnBP_TC EnBP_En EnBP_SMI : 1 indicates the BEEP is enabled for SMI# event EnBP_DF : 1 indicates the BEEP is enabled for Diode Fault event EnBP_AL : 1 indicates the BEEP is enabled for Low Alert event EnBP_AH : 1 indicates the BEEP is enabled for High Alert event EnBP_TC : 1 indicates the BEEP is enabled for T_CRIT# event EnBP_En : 1 indicates the BEEP is enabled 7.2.89 Fan Control Output Type Location : Index 5Eh Type : Read/Write Power on default value : 00h BIT 7 6 5 4 2 RSV NAME FUNC. 3 1 0 EnDCFAN2 EnDCFAN1 EnDCFAN2 : 0 indicates the FANCTL2 output is PWM type 1 indicates the FANCTL2 output is DC type EnDCFAN1 : 0 indicates the FANCTL1 output is PWM type 1 indicates the FANCTL1 output is DC type 7.2.90 Fan Control Output Mode Location : Index 5Fh Type : Read/Write Power on default value : 00h BIT 7 6 5 4 3 2 1 0 NAME RSV PWM3_P OL PWM2_P OL PWM1_P OL RSV PWM3_O D PWM2_O D PWM1_O D FUNC. PWM3_POL : 1 indicates the FANCTL3 PWM output is inverted PWM2_POL : 1 indicates the FANCTL2 PWM output is inverted PWM1_POL : 1 indicates the FANCTL1 PWM output is inverted PWM3_OD : 0 indicates the FANCTL3 PWM output is push pull 1 indicates the FANCTL3 PWM output is open drain PWM2_OD : 0 indicates the FANCTL2 PWM output is push pull 1 indicates the FANCTL2 PWM output is open drain PWM1_OD : 0 indicates the FANCTL1 PWM output is push pull 1 indicates the FANCTL1 PWM output is open drain - 45 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.91 Fan Control 1 Output Value Location : Index 60h TM Type : Read/Write for Manual mode , Read only for SMART FAN IV control Power on default value : 7FHEX. BIT 7 6 5 4 NAME FUNC. 3 2 1 0 1 0 1 0 FANDuty1 FANDuty1 : FANCTL1 output value 7.2.92 Fan Control 2 Output Value Location : Index 61h TM Type : Read/Write for Manual mode , Read only for SMART FAN IV control Power on default value : 7FHEX. BIT 7 6 5 4 2 FANDuty2 NAME FUNC. 3 FANDuty2 : FANCTL2 output value 7.2.93 Fan Control 3 Output Value Location : Index 62h TM Type : Read/Write for Manual mode , Read only for SMART FAN IV control Power on default value : 7FHEX. BIT 7 6 5 4 2 FANDuty3 NAME FUNC. 3 FANDuty3 : FANCTL3 output value 7.2.94 Close-Loop Fan Control RPM mode Register and Configure Register of PECI Error (CRPE) Location : Index 63h Type : Read/Write Power on default value : 00h BIT NAME FUNC. 7 6 TwoDimension 5 4 3 RPM_HIGH_EN 2 1 0 PECIERR TwoDimension : Close_Loop Fan Control Enable Bit7 : 1 indicated the FAN3 group enables Close-Loop Fan Control RPM mode Bit6 : 1 indicated the FAN2 group enables Close-Loop Fan Control RPM mode Bit5 : 1 indicated the FAN1 group enables Close-Loop Fan Control RPM mode RPM_HIGH_EN : Changing default unit of all RPM setting from 50 RPMs to 100 RPMs. It benefits to control ultra high RPM fan Bit4 : 1 indicated the FAN3 group support ultra high RPM fan Bit3 : 1 indicated the FAN2 group support ultra high RPM fan Bit2 : 1 indicated the FAN1 group support ultra high RPM fan PECIERR : Refer the table 7-1 PECI Error Condition Table to fan output value - 46 - Feb, 2012 Version: 1.2 NCT7802Y Table 7-1 PECI Error Condition Table BIT [1-0] PECI ERROR CONDITION 00BIN Fan output value keeps at its current value 01BIN Fan output value will be set to FOMV (Fan Output Min Value when PECI Error) 1xBIN Fan output value will be set to the full speed value (FFh) 7.2.95 Temperature to Fan mapping Relationships Register Location : Index 64h Type : Read/Write Power on default value : 00h BIT 7 NAME RSV 6 5 4 3 Temp2FanSelect 2 1 RSV 0 Temp1FanSelect TM Temp2FanSelect , Temp1FanSelect : Enable FANCTL3 – FANCTL1 SMART FAN FUNC. IV 0 = FANCTL has no relation with this temperature source. FANCTL is controlled by Manual mode (Default) TM 1 = Applies SMART FAN temperature TM IV control for SMART FAN IV on FANCTL and this 7.2.96 Temperature to Fan mapping Relationships Register Location : Index 65h Type : Read/Write Power on default value : 00h BIT 7 6 5 3 2 1 RSV NAME Temp3FanSelect : FUNC. 4 0 Temp3FanSelect TM Enable FANCTL3 – FANCTL1 SMART FAN IV 0 = FANCTL has no relation with this temperature source. FANCTL is controlled by Manual mode (Default) TM 1 = Applies SMART FAN temperature TM IV control for SMART FAN - 47 - IV on FANCTL and this Feb, 2012 Version: 1.2 NCT7802Y 7.2.97 Fan Control Configuration Register 1 Location : Index 66h Type : Read/Write Power on default value : 00h BIT 7 6 5 4 3 2 1 NAME Temp2_Sh are_En FUNC. Temp2_Share_En : Enable temperature2 sharing table function Temp2_Share_Sel : Select which temperature2 source could share control table in TM SMART FAN IV Temp1_Share_En : Enable temperature1 sharing table function Temp1_Share_Sel : Select which temperature1 source could share control table in TM SMART FAN IV Refer to the Table 7-2 Sharing Table Temp1_Sh are_En Temp2_Share_Sel 0 Temp1_Share_Sel Table 7-2 Sharing Table BIT [2-0] SHARE_SEL CONDITION 000BIN Remote 1 temperature will be referred 001BIN Remote 2 temperature will be referred 010BIN Remote 3 temperature will be referred 011BIN Local temperature will be referred 100BIN PECI Agent 0 temperature will be referred 101BIN PECI Agent 1 temperature will be referred 110BIN Programmable temperature 1 will be referred 111BIN Programmable temperature 2 will be referred 7.2.98 Fan Control Configuration Register 2 Location : Index 67h Type : Read/Write Power on default value : 00h BIT NAME 7 6 5 4 RSV 3 Temp3_Share_En 2 1 0 Temp3_Share_Sel Temp3_Share_En : Enable temperature3 sharing table function FUNC. Temp3_Share_Sel : Select which temperature3 source could share control table in TM SMART FAN IV Refer to the Table 7-2 Sharing Table - 48 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.99 Fan Control Configuration Register 3 Location : Index 68h Type : Read/Write Power on default value : 00h BIT 7 NAME RSV 6 5 4 3 Temp2_Source_Sel 2 RSV 1 0 Temp1_Source_Sel Temp2_Source_Sel : Temperature 2 source selection FUNC. Temp1_Source_Sel : Temperature 1 source selection Refer to the Table 7-3 Source Table Table 7-3 Source Table BIT [2-0] SOURCE_SEL CONDITION 000BIN Remote 1 temperature will be referred 001BIN Remote 2 temperature will be referred 010BIN Remote 3 temperature will be referred 011BIN Local temperature will be referred 100BIN PECI Agent 0 temperature will be referred 101BIN PECI Agent 1 temperature will be referred 110BIN Programmable temperature 1 will be referred 111BIN Programmable temperature 2 will be referred 7.2.100 Fan Control Configuration Register 4 Location : Index 69h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME FUNC. 4 3 2 RSV 1 0 Temp3_Source_Sel Temp3_Source_Sel : Temperature 3 source selection Refer to the Table 7-3 Source Table 7.2.101 Close-Loop Fan Control RPM mode Tolerance Register Location : Index 6Dh Type : Read/Write Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 RSV 2 1 0 Generic_Tol_RPM Generic_Tol_RPM : Tolerance of RPM mode, unit 50 RPM - 49 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.102 FANCTL Step Up Time Register Location : Index 6Eh Type : Read/Write Power on default value : 0Ah BIT 7 6 5 4 NAME 3 2 1 0 UpTime TM FUNC. UpTime : In SMART FAN IV mode, this register determines the amount of time FANOUT takes to increase its value by one step The units are intervals of 0.1 second. The default time is 1 second 7.2.103 FANCTL Step Down Time Register Location : Index 6Fh Type : Read/Write Power on default value : 0Ah BIT 7 6 5 4 3 2 1 0 DownTime NAME TM FUNC. DownTime : In SMART FAN IV mode, this register determines the amount of time FANOUT takes to decrease its value by one step The units are intervals of 0.1 second. The default time is 1 second 7.2.104 Default Fan Speed Register Location : Index 70h Type : Read/Write Power on default value : 7Fh BIT 7 6 5 3 2 1 0 2 1 0 DefaultFanSpeed NAME FUNC. 4 DefaultFanSpeed : Default Fan Speed at Power-on 7.2.105 FANCTL1 PWM Prescalar Register Location : Index 71h Type : Read/Write Power on default value : 84h BIT 7 NAME CLKSEL 6 5 4 3 Divisor[6:0] CKSEL : Clock source select FUNC. Divisor : Clock frequency Divisor Refer the Table 7-4 Divisor table A & Table 7-5 Divisor table B - 50 - Feb, 2012 Version: 1.2 NCT7802Y The clock source selected by CKSEL will be divided by the divisor and used as a fan PWM output frequency. If CKSEL equals 1, then the output clock is simply equal to 125/ (Divisor [6:0]+1) KHz MappedDivisor depends on Divisor [6:0] and is described in the table below. Table 7-4 Divisor Table A (CKSEL=1) DIVISOR[6:0] MAPPED DIVISOR OUTPUT FREQUENCY 0000000 1 125KHz 0000001 2 62.5KHz 0000010 3 41.6KHz 0000011 4 31.2KHz 0000100 5 25KHz 0001111 16 7.8KHz 0000101 6 20.8KHz 0011111 32 3.9KHz 0000110 7 17.8KHz 0111111 64 1.9KHz 0000111 8 15.6KHz 1111111 128 976Hz DIVISOR[6:0] MAPPED DIVISOR OUTPUT FREQUENCY RSV If CKSEL equals 0, then the output clock is simply equal to 1000/ Mapped Divisor Hz MappedDivisor depends on Divisor [3:0] and is described in the table below. Table 7-5 Divisor Table B (CKSEL=0) DIVISOR[3:0] MAPPED DIVISOR OUTPUT FREQUENCY DIVISOR[3:0] MAPPED DIVISOR OUTPUT FREQUENCY 0000 1 1000Hz 1000 12 83Hz 0001 2 500Hz 1001 16 62.5Hz 0010 3 333Hz 1010 32 31.25Hz 0011 4 250Hz 1011 64 15.6Hz 0100 5 200Hz 1100 128 7.8Hz 0101 6 166Hz 1101 256 3.9Hz 0110 7 142Hz 1110 512 1.9Hz 0111 8 125Hz 1111 1024 0.97Hz 7.2.106 FANCTL2 PWM Prescalar Register Location : Index 72h Type : Read/Write Power on default value : 84h BIT 7 NAME CLKSEL 6 5 4 3 2 1 0 Divisor[6:0] - 51 - Feb, 2012 Version: 1.2 NCT7802Y CKSEL : Clock source select FUNC. Divisor : Clock frequency Divisor Refer the Table 7-4 Divisor table A & Table 7-5 Divisor table B 7.2.107 FANCTL3 PWM Prescalar Register Location : Index 73h Type : Read/Write Power on default value : 84h BIT 7 NAME CLKSEL 6 5 4 3 2 1 0 1 0 Divisor[6:0] CKSEL : Clock source select FUNC. Divisor : Clock frequency Divisor Refer the Table 7-4 Divisor table A & Table 7-5 Divisor table B 7.2.108 Temp1 Hystersis Register Location : Index 74h Type : Read/Write Power on default value : 53h BIT 7 NAME RSV 6 5 4 3 Criti_HysT1 RSV TM FUNC. 2 Criti_HysT1 : Hystersis value of SMART FAN Oper_HysT1 IV Critical Temperature TM Oper_HysT1 : Hystersis value of SMART FAN IV Operating Temperature 7.2.109 Temp2 Hystersis Register Location : Index 75h Type : Read/Write Power on default value : 53h BIT 7 NAME RSV 6 5 4 3 Criti_HysT2 RSV TM FUNC. 2 Criti_HysT2 : Hystersis value of SMART FAN 1 0 Oper_HysT2 IV Critical Temperature TM Oper_HysT2 : Hystersis value of SMART FAN IV Operating Temperature 7.2.110 Temp3 Hystersis Register Location : Index 76h Type : Read/Write Power on default value : 53h BIT 7 NAME RSV 6 5 4 3 Criti_HysT3 RSV TM FUNC. Criti_HysT3 : Hystersis value of SMART FAN - 52 - 1 0 Oper_HysT3 IV Critical Temperature TM Oper_HysT3 : Hystersis value of SMART FAN 2 IV Operating Temperature Feb, 2012 Version: 1.2 NCT7802Y 7.2.111FANCTL Start Duty Cycle Register Location : Index 77h Type : Read/Write Power on default value :30h BIT 7 6 5 4 NAME FUNC. 3 2 1 0 StartDutyCycle StartDutyCycle : control the FANCTL1-FANCTL3 fan output start-up value 7.2.112 FANCTL Stop Time Register Location : Index 78h Type : Read/Write Power on default value : FFh BIT 7 6 5 4 NAME 3 2 1 0 StopTime StopTime : control the FANCTL1-FANCTL3 fan stop time FUNC. Unit in 0.1sec. Ranges from 0.1sec to 25.5 sec If set to 0, the fan will never stop 7.2.113 NonStop Disable Register Location : Index 79h Type : Read/Write Power on default value : 00h BIT 7 6 5 4 3 RSV NAME 2 1 0 NonStop_Fan3 NonStop_Fan2 NonStop_Fan1 NonStop_FAN3 : 1 indicates the FAN3 NonStop function disabled FUNC. NonStop_FAN2 : 1 indicates the FAN2 NonStop function disabled NonStop_FAN1 : 1 indicates the FAN1 NonStop function disabled 7.2.114 Fan Output Min Value when PECI Error Register (FOMV) Location : Index 7Ah Type : Read/Write Power on default value : 80h BIT NAME FUNC. 7 6 5 4 3 2 1 0 MinDuty_PECIERR MinDuty_PECIERR : control the FANCTL1-FANCTL3 fan output min value when PECI error condition is occurred. Also see CRPE (Configure Register of PECI Error) - 53 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.115Table 1 X-axis Transition Point 1 Register Location : Index 80h Type : Read/Write Power on default value : 19h BIT 7 6 5 NAME FUNC. 4 3 2 1 0 1 0 1 0 1 0 Temp1Table_TR1 TM Temp1Table_TR1 : Temperature point 1 of SMART FAN IV table 1 7.2.116 Table 1 X-axis Transition Point 2 Register Location : Index 81h Type : Read/Write Power on default value : 23h BIT 7 6 5 NAME FUNC. 4 3 2 Temp1Table_TR2 TM Temp1Table_TR2 : Temperature point 2 of SMART FAN IV table 1 7.2.117 Table 1 X-axis Transition Point 3 Register Location : Index 82h Type : Read/Write Power on default value : 2Dh BIT 7 6 5 3 2 Temp1Table_TR3 NAME FUNC. 4 TM Temp1Table_TR3 : Temperature point 3 of SMART FAN IV table 1 7.2.118 Table 1 X-axis Transition Point 4 Register Location : Index 83h Type : Read/Write Power on default value : 37h BIT NAME FUNC. 7 6 5 4 3 2 Temp1Table_TR4 TM Temp1Table_TR4 : Temperature point 4 of SMART FAN - 54 - IV table 1 Feb, 2012 Version: 1.2 NCT7802Y 7.2.119 Table 1 X-axis Critical Point Register Location : Index 84h Type : Read/Write Power on default value : 3Ch BIT 7 6 5 NAME FUNC. 4 3 2 1 0 Temp1Table_TRCritical TM Temp1Table_TRCritical : Critical Temperature point of SMART FAN IV table 1 7.2.120 Table 1 Y-axis Transition Point 1 Register Location : Index 85h Type : Read/Write Power on default value : 8Ch BIT 7 6 5 3 2 1 0 1 0 1 0 Temp1Table_FL1 NAME FUNC. 4 TM Temp1Table_FL1 : FANCTL point 1 of SMART FAN IV table 1 7.2.121 Table 1 Y-axis Transition Point 2 Register Location : Index 86h Type : Read/Write Power on default value : AAh BIT 7 6 5 NAME FUNC. 4 3 2 Temp1Table_FL2 TM Temp1Table_FL2 : FANCTL point 2 of SMART FAN IV table 1 7.2.122 Table 1 Y-axis Transition Point 3 Register Location : Index 87h Type : Read/Write Power on default value : C8h BIT NAME FUNC. 7 6 5 4 3 2 Temp1Table_FL3 TM Temp1Table_FL3 : FANCTL point 3 of SMART FAN - 55 - IV table 1 Feb, 2012 Version: 1.2 NCT7802Y 7.2.123Table 1 Y-axis Transition Point 4 Register Location : Index 88h Type : Read/Write Power on default value : E6h BIT 7 6 5 NAME FUNC. 4 3 2 1 0 1 0 1 0 1 0 Temp1Table_FL4 TM Temp1Table_FL4 : FANCTL point 4 of SMART FAN IV table 1 7.2.124 Table 2 X-axis Transition Point 1 Register Location : Index 90h Type : Read/Write Power on default value : 19h BIT 7 6 5 NAME FUNC. 4 3 2 Temp2Table_TR1 TM Temp2Table_TR1 : Temperature point 1 of SMART FAN IV table 2 7.2.125Table 2 X-axis Transition Point 2 Register Location : Index 91h Type : Read/Write Power on default value : 23h BIT 7 6 5 NAME FUNC. 4 3 2 Temp2Table_TR2 TM Temp2Table_TR2 : Temperature point 2 of SMART FAN IV table 2 7.2.126 Table 2 X-axis Transition Point 3 Register Location : Index 92h Type : Read/Write Power on default value : 2Dh BIT NAME FUNC. 7 6 5 4 3 2 Temp2Table_TR3 TM Temp2Table_TR3 : Temperature point 3 of SMART FAN - 56 - IV table 2 Feb, 2012 Version: 1.2 NCT7802Y 7.2.127 Table 2 X-axis Transition Point 4 Register Location : Index 93h Type : Read/Write Power on default value : 37h BIT 7 6 5 NAME FUNC. 4 3 2 1 0 1 0 Temp2Table_TR4 TM Temp2Table_TR4 : Temperature point 4 of SMART FAN IV table 2 7.2.128 Table 2 X-axis Critical Point Register Location : Index 94h Type : Read/Write Power on default value : 3Ch BIT 7 6 5 NAME FUNC. 4 3 2 Temp2Table_TRCritical TM Temp2Table_TRCritical : Critical Temperature point of SMART FAN IV table 2 7.2.129Table 2 Y-axis Transition Point 1 Register Location : Index 95h Type : Read/Write Power on default value : 8Ch BIT 7 6 5 NAME FUNC. 4 3 2 1 0 1 0 Temp2Table_FL1 TM Temp2Table_FL1 : FANCTL point 1 of SMART FAN IV table 2 7.2.130 Table 2 Y-axis Transition Point 2 Register Location : Index 96h Type : Read/Write Power on default value : AAh BIT NAME FUNC. 7 6 5 4 3 2 Temp2Table_FL2 TM Temp2Table_FL2 : FANCTL point 2 of SMART FAN - 57 - IV table 2 Feb, 2012 Version: 1.2 NCT7802Y 7.2.131 Table 2 Y-axis Transition Point 3 Register Location : Index 97h Type : Read/Write Power on default value : C8h BIT 7 6 5 NAME FUNC. 4 3 2 1 0 1 0 1 0 1 0 Temp2Table_FL3 TM Temp2Table_FL3 : FANCTL point 3 of SMART FAN IV table 2 7.2.132 Table 2 Y-axis Transition Point 4 Register Location : Index 98h Type : Read/Write Power on default value : E6h BIT 7 6 5 NAME FUNC. 4 3 2 Temp2Table_FL4 TM Temp2Table_FL4 : FANCTL point 4 of SMART FAN IV table 2 7.2.133 Table 3 X-axis Transition Point 1 Register Location : Index A0h Type : Read/Write Power on default value : 19h BIT 7 6 5 NAME FUNC. 4 3 2 Temp3Table_TR1 TM Temp3Table_TR1 : Temperature point 1 of SMART FAN IV table 3 7.2.134 Table 3 X-axis Transition Point 2 Register Location : Index A1h Type : Read/Write Power on default value : 23h BIT NAME FUNC. 7 6 5 4 3 2 Temp3Table_TR2 TM Temp3Table_TR2 : Temperature point 2 of SMART FAN - 58 - IV table 3 Feb, 2012 Version: 1.2 NCT7802Y 7.2.135 Table 3 X-axis Transition Point 3 Register Location : Index A2h Type : Read/Write Power on default value : 2Dh BIT 7 6 5 NAME FUNC. 4 3 2 1 0 1 0 1 0 Temp3Table_TR3 TM Temp3Table_TR3 : Temperature point 3 of SMART FAN IV table 3 7.2.136 Table 3 X-axis Transition Point 4 Register Location : Index A3h Type : Read/Write Power on default value : 37h BIT 7 6 5 NAME FUNC. 4 3 2 Temp3Table_TR4 TM Temp3Table_TR4 : Temperature point 4 of SMART FAN IV table 3 7.2.137 Table 3 X-axis Critical Point Register Location : Index A4h Type : Read/Write Power on default value : 3Ch BIT 7 6 5 NAME FUNC. 4 3 2 Temp3Table_TRCritical TM Temp3Table_TRCritical : Critical Temperature point of SMART FAN IV table 3 7.2.138 Table 3 Y-axis Transition Point 1 Register Location : Index A5h Type : Read/Write Power on default value : 8Ch BIT NAME FUNC. 7 6 5 4 3 2 1 0 Temp3Table_FL1 TM Temp3Table_FL1 : FANCTL point 1 of SMART FAN - 59 - IV table 3 Feb, 2012 Version: 1.2 NCT7802Y 7.2.139 Table 3 Y-axis Transition Point 2 Register Location : Index A6h Type : Read/Write Power on default value : AAh BIT 7 6 5 NAME FUNC. 4 3 2 1 0 1 0 1 0 1 0 Temp3Table_FL2 TM Temp3Table_FL2 : FANCTL point 2 of SMART FAN IV table 3 7.2.140 Table 3 Y-axis Transition Point 3 Register Location : Index A7h Type : Read/Write Power on default value : C8h BIT 7 6 5 NAME FUNC. 4 3 2 Temp3Table_FL3 TM Temp3Table_FL3 : FANCTL point 3 of SMART FAN IV table 3 7.2.141Table 3 Y-axis Transition Point 4 Register Location : Index A8h Type : Read/Write Power on default value : E6h BIT 7 6 5 NAME FUNC. 4 3 2 Temp3Table_FL4 TM Temp3Table_FL4 : FANCTL point 4 of SMART FAN IV table 3 7.2.142 TD1 Offset Register Location : Index C1h Type : Read/Write Power on default value : 3Dh BIT NAME FUNC. 7 6 5 4 3 RSV 2 Offset_TD1 Offset_TD1 : TD1 function offset register - 60 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.143 TD2 Offset Register Location : Index C2h Type : Read/Write Power on default value : 3Dh BIT 7 NAME FUNC. 6 5 4 3 RSV 2 1 0 1 0 Offset_TD2 Offset_TD2 : TD2 function offset register 7.2.144 TR1 Offset Register Location : Index C4h Type : Read/Write Power on default value : 00h BIT 7 6 NAME FUNC. 5 4 3 RSV 2 Offset_TR1 Offset_TR1 : TR1 function offset register 7.2.145 TR2 Offset Register Location : Index C5h Type : Read/Write Power on default value : 00h BIT 7 6 NAME FUNC. 5 4 3 RSV 2 1 0 Offset_TR2 Offset_TR2 : TR2 function offset register 7.2.146 TR3 Offset Register Location : Index C6h Type : Read/Write Power on default value : 00h BIT NAME FUNC. 7 6 5 4 3 RSV 2 1 0 Offset_TR3 Offset_TR3 : TR3 function offset register - 61 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.147Digital Filter Level Select Register Location : Index CBh Type : Read/Write Power on default value : 00h BIT 7 NAME 6 5 LDT 4 3 RT3 2 1 RT2 0 RT1 00 : No filter selected. (Default) 01: Filter Level 1 selected. FUNC. 10: Filter Level 2 selected. 11: Filter Level 3 selected. Higher level will slow down the temperature sensor response. 7.2.148 Programmable Temperature 1 Register Location : Index E3h Type : Read/Write Power on default value : 00h BIT 7 6 5 3 2 1 0 2 1 0 2 1 0 PGM_TEMP1[7:0] NAME FUNC. 4 PGM_TEMP1[7:0] : Programmable Temperature 1 7.2.149 Programmable Temperature 2 Register Location : Index E4h Type : Read/Write Power on default value : 00h BIT 7 6 5 3 PGM_TEMP2[7:0] NAME FUNC. 4 PGM_TEMP2[7:0] : Programmable Temperature 2 7.2.150 Software Reset Register Location : Index FCh Type : Write Only BIT 7 NAME INIT FUNC. 6 5 4 3 RSV INIT : Write 1 to reset the NCT7802Y - 62 - Feb, 2012 Version: 1.2 NCT7802Y 7.2.151Vendor ID Register Location : Index FDh Type : Ready Only Power on default value : 50h BIT 7 6 5 4 2 1 0 3 2 1 0 3 2 1 0 VendorID NAME FUNC. 3 VendorID: Vendor ID of NCT7802Y 7.2.152 Chip ID Register Location : Index FEh Type : Ready Only Power on default value : C3h BIT 7 6 5 4 ChipID NAME FUNC. ChipID: Chip ID of NCT7802Y 7.2.153 Version ID Register Location : Index FFh Type : Ready Only Power on default value : 2xh BIT NAME FUNC. 7 6 5 4 VersionID VersionID: Versin ID of NCT7802Y, the value is 2xh (x=0,1,2…) - 63 - Feb, 2012 Version: 1.2 NCT7802Y 7.3 BANK 1 REGISTER MAP Idx Register Name Att Df 0 Bank Select R/W 00 7 6 5 4 3 2 RSV BKSEL PECI Control Reg-1 RW 10 2 PECI Control Reg-2 RW 00 RSV TN_Extend[1:0] 3 PECI Control Reg-3 RW 00 RSV En_Agt[1:0] 4 Report Temp Style 1 RW 00 RW 00 Addr RW 00 Write_Length RW 00 Read_Length RW 00 Command_Code RW 00 RSV Tbase0[6:0] RW 00 RSV Tbase1[6:0] RW 00 WrData_1 RW 00 WrData_2 RW 00 WrData_3 RW 00 WrData_4 RW 00 WrData_5 RW 00 WrData_6 RW 00 WrData_7 RW 00 WrData_8 RW 00 WrData_9 RW 00 WrData_10 RW 00 WrData_11 RW 00 WrData_12 RO F8 RTH_Agt0_D0 RO 80 RTL_Agt0_D0 RO F8 RTH_Agt0_D1 RO 80 RTL_Agt0_D1 RO F8 RTH_Agt1_D0 RO 80 RTL_Agt1_D0 RO F8 RTH_Agt1_D1 RO 80 RTL_Agt1_D1 6 7 8 9 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E Address content for manual command Write Length for manual command Read Length for manual command Command Code for manual command Agent0 Base Temperature Agent1 Base Temperature Generic write in data 1 to client Generic write in data 2 to client Generic write in data 3 to client Generic write in data 4 to client Generic write in data 5 to client Generic write in data 6 to client Generic write in data 7 to client Generic write in data 8 to client Generic write in data 9 to client Generic write in data 10 to client Generic write in data 11 to client Generic write in data 12 to client Agt0_D0 Relative Temp (HB) Agt0_D0 Relative Temp (LB) Agt0_D1 Relative Temp (HB) Agt0_D1 Relative Temp (LB) Agt1_D0 Relative Temp (HB) Agt1_D0 Relative Temp (LB) Agt1_D1 Relative Temp (HB) Agt1_D1 Relative Temp (LB) PECI_En RSV RSV - 64 - RSV RSV Clamp 0 Manual_E Routine_En n 1 5 1 RSV Dmn1_Agt[3:0] RtDmn_Agt[1:0] RtHigher Feb, 2012 Version: 1.2 NCT7802Y Idx Register Name Att Df 1F Agent Characteristic RO 00 RO 00 RdData_1 RO 00 RdData_2 RO 00 RdData_3 RO 00 RdData_4 RO 00 RdData_5 RO 00 RdData_6 RO 00 RdData_7 RO 00 RdData_8 RO 00 RdData_9 2A 2B 2C 2D 2E 2F 30 31 32 Generic read out data 1 from client Generic read out data 2 from client Generic read out data 3 from client Generic read out data 4 from client Generic read out data 5 from client Generic read out data 6 from client Generic read out data 7 from client Generic read out data 8 from client Generic read out data 9 from client 7 6 5 4 3 RSV - 65 - 2 1 0 Alive_Agt[1:0] Feb, 2012 Version: 1.2 NCT7802Y 7.4 BANK 1 REGISTER DETAIL 7.4.1 PECI Control Register 1 Location : Index 01h Type : Read/Write Power on default value : 10h BIT READ / WRITE 7 R/W Enable PECI Function (PECI_En) 6~2 R/W Reserved 1 R/W Enable PECI Manual Command Function (Manual_En) 0 R/W Enable PECI GetTemp Routine Function (Routine_En) 7.4.2 DESCRIPTION PECI Control Register 2 Location : Index 02h Type : Read/Write Power on default value : 00h BIT READ / WRITE 7~6 R/W 5 R/W 4 R/W 3~0 R/W 7.4.3 DESCRIPTION Reserved TN_Extend[1:0] Adjust Transaction Rate 00BIN = 1.5 MHz 01BIN = 750 KHz 10BIN = 375 KHz 11BIN = 187.5 KHz Reserved PECI Control Register 3 Location : Index 03h Type : Read/Write Power on default value : 00h BIT READ / WRITE DESCRIPTION 7~6 R/W Reserved 5 R/W 4 R/W En_Agt[1:0] PECI host to process related agents enable or disable agent PECI host to process related agents enable or disable agent0 3~2 R/W Reserved 1 R/W Dmn1_Agt[1:0] Indicate which agent with domain1 - 66 - Feb, 2012 Version: 1.2 NCT7802Y BIT READ / WRITE 0 R/W 7.4.4 DESCRIPTION 0 = Agent does not have domain 1 1 = Agent has domain 1 (Do not set to 1 , if the CPU does not exist domain 1) Report Temperature Style Register Location : Index 04h Type : Read/Write Power on default value : 00h BIT READ / WRITE DESCRIPTION 7~5 R/W Reserved 4 R/W When temperature data reading is positive or less than -128, can enable this function to clamp temperature data.(Clamp) 3 R/W Reserved 2 R/W RtDmn_Agt[1:0] Agent 1 - Agent 0 always return the relative domain Temperature 1 R/W 0 = Agent always returns the relative temperature from domain 0 1 = Agent always returns the relative temperature from domain 1 Return High Temperature of doamin0 or domain1.(RtHigher) 0 R/W 0 = The temperature of each agent is returned from domain 0 or domain 1, which is controlled by (CR 04HEX) 1 = Return the highest temperature in domain 0 and domain 1 of individual Agent 7.4.5 Address Content for Manual Command Register Location : Index 05h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 3 2 1 0 0 0 0 1 0 PECI Command Address 0 0 DESCRIPTION 7.4.6 4 0 0 0 The data would be sent to client Write Length for Manual Command Register Location : Index 06h Type : Read/Write Power on default value : 00h BIT NAME 7 6 5 4 3 2 PECI Command Write Length - 67 - Feb, 2012 Version: 1.2 NCT7802Y DEFAULT 0 0 0 DESCRIPTION 7.4.7 0 0 0 0 0 1 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 The data would be sent to client Read Length for Manual Command Register Location : Index 07h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 3 2 PECI Command Read Length 0 0 0 DESCRIPTION 7.4.8 4 0 0 0 The data would be sent to client Command Code for Manual Command Register Location : Index 08h Type : Read/Write Power on default value : 00h BIT 7 6 5 4 NAME DEFAULT PECI Command Code 0 0 0 DESCRIPTION 7.4.9 3 0 0 The data would be sent to client Agent0 Base Temperature Register Location : Index 09h Type : Read/Write Power on default value : 00h BIT 7 NAME Reserved DEFAULT 0 6 5 4 3 Tbase 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.10 Agent1 Base Temperature Register Location : Index 0Ah Type : Read/Write Power on default value : 00h BIT 7 NAME Reserved DEFAULT 0 DESCRIPTION 6 5 4 3 Tbase 1 0 0 0 0 The data would be sent to client - 68 - Feb, 2012 Version: 1.2 NCT7802Y 7.4.11 Generic Write in Data 1 to Client Register Location : Index 0Bh Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 PECI Write Data 1 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.12 Generic Write in Data 2 to Client Register Location : Index 0Ch Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Write Data 2 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.13 Generic Write in Data 3 to Client Register Location : Index 0Dh Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Write Data 3 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.14 Generic Write in Data 4 to Client Register Location : Index 0Eh Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT DESCRIPTION 4 3 PECI Write Data 4 0 0 0 0 0 The data would be sent to client - 69 - Feb, 2012 Version: 1.2 NCT7802Y 7.4.15 Generic Write in Data 5 to Client Register Location : Index 0Fh Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 PECI Write Data 5 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.16 Generic Write in Data 6 to Client Register Location : Index 10h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Write Data 6 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.17 Generic Write in Data 7 to Client Register Location : Index 11h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Write Data 7 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.18 Generic Write in Data 8 to Client Register Location : Index 12h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT DESCRIPTION 4 3 PECI Write Data 8 0 0 0 0 0 The data would be sent to client - 70 - Feb, 2012 Version: 1.2 NCT7802Y 7.4.19 Generic Write in Data 9 to Client Register Location : Index 13h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 PECI Write Data 9 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.20 Generic Write in Data 10 to Client Register Location : Index 14h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Write Data 10 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.21 Generic Write in Data 11 to Client Register Location : Index 15h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Write Data 11 0 0 DESCRIPTION 0 0 0 The data would be sent to client 7.4.22 Generic Write in Data 12 to Client Register Location : Index 16h Type : Read/Write Power on default value : 00h BIT 7 6 5 NAME DEFAULT DESCRIPTION 4 3 PECI Write Data 12 0 0 0 0 0 The data would be sent to client - 71 - Feb, 2012 Version: 1.2 NCT7802Y 7.4.23 Agent Relative Temperature Register Location : Index 17h ~ 1Eh Type : Read Only Power on default value : F880h These registers return the raw data retrieved from PECI GetTemp(). The data may be the error code (range: 8000H~81FFH) or relative temperatures to process the defined Tbase. The error code will only be update in ARTR and absolute Temperature will not be updated when the error code is received. If the RtHigher mechanism is activated, the normal temperature will always be returned first. In case both 2 domains return errors, the return priority will be Overflow Error > Underflow Error > Missing Diode > General Error. The reset value is 8001 HEX, in that PECI is defaulted to be off. In PECI, 8001HEX means the diode is missing. INDEX 17-1E DESCRIPTION 17h[15:8],18h[7:0] Domain0 Relative Temperature Agent0 [15:0] 19h[15:8],1Ah[7:0] Domain1 Relative Temperature Agent0 [15:0] 1Bh[15:8],1Ch[7:0] Domain0 Relative Temperature Agent1 [15:0] 1Dh[15:8],1Eh[7:0] Domain1 Relative Temperature Agent1 [15:0] GetTemp() PECI Temperature format BIT DESCRIPTION 15 Sign Bit. (Sign) In PECI Protocol, this bit should always be 1 to represent a negative temperature. 14-6 The integer part of the relative temperature. (Temperature[8:0]) 5 TEMP_2. 0.5℃ unit. 4 TEMP_4. 0.25℃ unit. 3 TEMP_8. 0.125℃ unit. 2 TEMP_16. 0.0625℃ unit. 1 TEMP_32. 0.03125℃ unit. 0 TEMP_64. 0.015625℃ unit. GetTemp() Response Definition RESPONSE MEANING General Sensor Error (GSE) Thermal scan did not complete in time. Retry is appropriate. 0x0000 Processor is running at its maximum temperature or is currently being reset. All other data Valid temperature reading, reported as a negative offset from the TCC activation temperature. The valide temperature reading is referred to GetTemp() PECI Temperature format - 72 - Feb, 2012 Version: 1.2 NCT7802Y ERROR CODE DESCRIPTION HOST OPERATION 8000HEX General Sensor Error 8001HEX Sensing Device Missing 8002HEX Operational, but the temperature is lower than the sensor operation range. Compulsorily write 0℃ back to the temperature readouts. 8003HEX Operational, but the temperature is higher than the sensor operation range. Compulsorily write 127℃ back to the temperature readouts. Reserved No further operation. 8004HEX ~ 81FFHEX No further processing. 7.4.24 Agent Characteristic Register Location : Index 1Fh Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT 1 3 2 1 RSV 0 0 0 BIT 7~2 4 0 PECI Alive Agent 0 0 0 0 0 DESCRIPTION Reserved 1: agent1 is able to respond to Ping() command. Agent alive 0: agent1 isn‟t able to respond to Ping() command. Agent is not alive 0 1: agent0 is able to respond to Ping() command. Agent alive 0: agent0 isn‟t able to respond to Ping() command. Agent is not alive 7.4.25 Generic Read Out Data 1 from Client Register Location : Index 2Ah Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT DESCRIPTION 4 3 2 1 0 0 0 0 PECI Read Data 1 0 0 0 0 0 The data would be got from client - 73 - Feb, 2012 Version: 1.2 NCT7802Y 7.4.26 Generic Read Out Data 2 from Client Register Location : Index 2Bh Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 PECI Read Data 2 0 0 DESCRIPTION 0 0 0 The data would be got from client 7.4.27 Generic Read Out Data 3 from Client Register Location : Index 2Ch Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Read Data 3 0 0 DESCRIPTION 0 0 0 The data would be got from client 7.4.28 Generic Read Out Data 4 from Client Register Location : Index 2Dh Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Read Data 4 0 0 DESCRIPTION 0 0 0 The data would be got from client 7.4.29 Generic Read Out Data 5 from Client Register Location : Index 2Eh Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT DESCRIPTION 4 3 PECI Read Data 5 0 0 0 0 0 The data would be got from client - 74 - Feb, 2012 Version: 1.2 NCT7802Y 7.4.30 Generic Read Out Data 6 from Client Register Location : Index 2Fh Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 2 1 0 0 0 0 PECI Read Data 6 0 0 DESCRIPTION 0 0 0 The data would be got from client 7.4.31 Generic Read Out Data 7 from Client Register Location : Index 30h Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Read Data 7 0 0 DESCRIPTION 0 0 0 The data would be got from client 7.4.32 Generic Read Out Data 8 from Client Register Location : Index 31h Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT 4 3 PECI Read Data 8 0 0 DESCRIPTION 0 0 0 The data would be got from client 7.4.33 Generic Read Out Data 9 from Client Register Location : Index 32h Type : Read Only Power on default value : 00h BIT 7 6 5 NAME DEFAULT DESCRIPTION 4 3 PECI Read Data 9 0 0 0 0 0 The data would be got from client - 75 - Feb, 2012 Version: 1.2 NCT7802Y 8. ELECTRICAL CHARACTERISTICS 8.1 Absolute Maximum Ratings PARAMETER RATING UNIT Power Supply Voltage 3.3V  5% V Input Voltage -0.3 to +3.6 V Operating Temperature -40 to +85 C Storage Temperature -55 to +150 C Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device. 8.2 DC Characteristics (Ta = 0 C to 70 C, VDD = 3.3V  5%, GND = 0V) PARAMETER SYM. MIN. TYP. MAX. UNIT CONDITIONS OD12 – Open-drain output pin with source-sink capability of 12 mA, with 5V tolerance support. Output Low Voltage VOL 0.4 V IOL = 12 mA OUT12 - Output buffer pin with source-sink capability of 12 mA, with 5V tolerance support. Output Low Voltage VOL Output High Voltage VOH INts - 0.4 2.4 V IOL = 12 mA V IOH = -12 mA V VDD = 3.3V V VDD = 3.3V TTL level Schmitt-triggered input pin, with 5V tolerance support. Input Low Voltage VIL Input High Voltage VIH Input High Leakage ILIH +10 A VIN=3.3V Input Low Leakage ILIL -10 A VIN=0V V1 – Bi-direction pin for INTEL 0.8 2.0 TM PECI Input Low Voltage VIL 0.275Vtt 0.5Vtt V Input High Voltage VIH 0.55Vtt 0.725Vtt V Output Low Voltage VOL 0.25Vtt V Output High Voltage VOH 0.75Vtt V - 76 - Feb, 2012 Version: 1.2 NCT7802Y 8.3 AC Characteristics SMBus Interface PARAMETER SCL clock period SYMBOL - MIN. MAX. UNIT t SCL 2.5 uS Start condition hold time tHD;SDA 1.5 uS Stop condition setup-up time tSU;STO 1 uS DATA to SCL setup time tSU;DAT 120 nS DATA to SCL hold time tHD;DAT 5 nS SCL and SDA rise time tR 1.0 uS SCL and SDA fall time tF 300 nS - 77 - Feb, 2012 Version: 1.2 NCT7802Y 9. ORDERING INFORMATION PART NUMBER PACKAGE REMARKS NCT7802Y QFN20 Green Package (Halogen-free) 10. TOP MARKING SPECIFICATIONS NCT7802Y 113TABA st 1 Line : Nuvoton Logo nd 2 Line : Part number- NCT7802Y rd 3 Line : Assembly tracking code 1 13: packages made in year 2011, week 13 T : Assembly house code A : IC version BA : Nuvoton internal use code - 78 - Feb, 2012 Version: 1.2 NCT7802Y 11. PACKAGE DRAWING AND DIMENSIONS QFN20 4x4 MM2 TOP VIEW 15 BOTTOM VIEW 11 16 11 10 10 6 6 15 16 20 20 1 5 5 - 79 - 1 Feb, 2012 Version: 1.2 NCT7802Y 12. REVISION HISTORY VERSION DATE PAGE 1.0 07/13/2011 N.A. 1.1 1/5/2012 2 1.2 2/2/2012 7,16 DESCRIPTION Public released, all versions before 1.0 are preliminary versions. Added VCC monitoring accuracy item. Added Programming description. from EEPROM Important Notice Nuvoton Products are neither intended nor warranted for usage in systems or equipment, any malfunction or failure of which may cause loss of human life, bodily injury or severe property damage. Such applications are deemed, “Insecure Usage”. Insecure usage includes, but is not limited to: equipment for surgical implementation, atomic energy control instruments, airplane or spaceship instruments, the control or operation of dynamic, brake or safety systems designed for vehicular use, traffic signal instruments, all types of safety devices, and other applications intended to support or sustain life. All Insecure Usage shall be made at customer’s risk, and in the event that third parties lay claims to Nuvoton as a result of customer’s Insecure Usage, customer shall indemnify the damages and liabilities thus incurred by Nuvoton. - 80 - Feb, 2012 Version: 1.2