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IT8705F
Preliminary Environment Controller (EC) Programming Guide V0.3
IT8705F EC Programming Guide
Notice: The information provided in this publication is believed to be accurate. Integrated circuits sold by ITE are covered by the warranty and patent indemnification provisions stipulated in the terms ITE Terms and Conditions of Sale, as revised from time to time. ITE makes no warranty, expressed, statutory, implied, or by description, regarding the information in this publication or regarding the freedom of the described chip(s) from patent infringement, except as specifically provided in the ITE Terms and Conditions of Sale. Furthermore, ITE makes no warranty of merchantability or fitness for any purpose. ITE reserves the right to halt production or modify specifications and prices at any time without notice. Accordingly, the reader is cautioned to verify that the specification and other information included in this publication is current before placing product orders. Products described herein are intended for use in normal commercial applications. Applications involving unusual environment or reliability requirements (e.g., military equipment or medical life-support equipment) are specifically not recommended without additional processing by ITE for such applications. All trademarks are the sole property of their respective owners.
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IT8705F EC Programming Guide
Revision History
Version 0.1 0.2 0.3 Date 8/30/99 9/6/99 03/01/01 Changes from Last Version * Initial version * Added Analog to Digital Table for Monitoring Voltage * Revised the bit 5 of section 3.4.1 Configuration Register to " Reserved" .
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IT8705F EC Programming Guide
Contents
1. Overview .................................................................................................................................................1 2. Flow Charts.............................................................................................................................................2 3. Programming Guide ...............................................................................................................................5 3.1 3.2 3.3 3.4 Interfaces...........................................................................................................................................5 Set Configuration Registers ...............................................................................................................5 Pre-settings for EC Monitoring Process ..............................................................................................5 Register Description...........................................................................................................................6 Configuration Register (Index=00h, Default=18h) ........................................................................6 Interrupt Status Register 1 (Index=01h, Default=00h) ..................................................................6 Interrupt Status Register 2 (Index=02h, Default=00h) ..................................................................6 Interrupt Status Register 3 (Index=03h, Ddfault=00h) ..................................................................7 SMI# Mask Register 1 (Index=04h, Default=00h) ........................................................................7 SMI# Mask Register 2 (Index=05h, Default=00h) ........................................................................7 SMI# Mask Register 3 (Index=06h, Default=00h) ........................................................................7 Interrupt Mask Register 1 (Index=07h, Default=00h)....................................................................7 Interrupt Mask Register 2 (Index=08h, Default=00h)....................................................................7
3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 3.4.6 3.4.7 3.4.8 3.4.9
3.4.10 Interrupt Mask Register 3 (Index=09h, Default=00h)....................................................................8 3.4.11 VID Register (Index=0Ah) ...........................................................................................................8 3.4.12 Fan Tachometer Divisor Register (Index=0Bh, Default=09h) .......................................................8 3.4.13 Fan Tachometer 1-3 Reading Registers (Index=0Dh-0Fh)...........................................................8 3.4.14 Fan Tachometer 1-3 Limit Registers (Index=10h-12h) .................................................................8 3.4.15 Fan Controller Main Control Register (Index=13h, Default=00h) ..................................................9 3.4.16 FAN_CTL Control Register (Index=14h, Default=00h) .................................................................9 3.4.17 FAN_CTL1 PWM Control Register (Index=15h, Default=00h)......................................................9 3.4.18 FAN_CTL2 PWM Control Register (Index=16h, Default=00h)......................................................9 3.4.19 FAN_CTL3 PWM Control Register (Index=17h, Default=00h)....................................................10 3.4.20 VIN7-VIN0 Voltage Reading Registers (Index=27h-20h)............................................................10 3.4.21 VBAT Voltage Reading Register (Index=28h)............................................................................10 3.4.22 TMPIN3-1 Temperature Reading Registers (Index=2Bh-29h)....................................................10 3.4.23 VIN7-0 High Limit Registers (Index=3Eh, 3Ch, 3Ah, 38h, 36h, 34h, 32h, 30h) ...........................10 3.4.24 VIN7-0 Low Limit Registers (Index=3Fh, 3Dh, 3Bh, 39h, 37h, 35h, 33h, 31h) ............................10 3.4.25 TMPIN3-1 High Limit Registers (Index=44h, 42h, 40h) ..............................................................10 3.4.26 TMPIN3-1 Low Limit Registers (Index=45h, 43h, 41h)...............................................................11 3.4.27 Serial Bus Interface Address Register (Index=48h, Default=2Dh) ..............................................11 3.4.28 ADC Voltage Channel Enable Register (Index=50h, Default=00h) .............................................11 3.4.29 ADC Temperature Channel Enable Register (Index=51h, Default=00h).....................................11 3.4.30 TMPIN3-1 Thermal Output Limit Registers (Index=54h-52h, Default=7Fh).................................11 3.4.31 Vendor ID Register (Index=58h, Default=90h) ...........................................................................11 3.4.32 Thermal Diode Zero Degree Adjust Register (Index=59h, Default=56h).....................................11 i
IT8705F EC Programming Guide
3.4.33 Beep Event Enable Register (Index=5Ch, Default=00h) ............................................................12 3.4.34 Beep Frequency Divisor of Fan Event Register (Index=5Dh, Default=00h) ................................12 3.4.35 Beep Frequency Divisor of Voltage Event Register (Index=5Eh, Default=00h)...........................12 3.4.36 Beep Frequency Divisor of Temperature Event Register (Index=5Fh, Default=00h)...................12 3.4.37 FAN_CTL3-1 SmartGuardian Automatic Mode Temperature Limit of OFF Registers (Index=70h, 68h, 60h, Default=7Fh) .............................................................................................................12 3.4.38 FAN_CTL3-1 SmartGuardian Automatic Mode Temperature Limit of Low Speed Registers (Index=71h, 69h, 61h, Default=7Fh)..........................................................................................12 3.4.39 FAN_CTL3-1 SmartGuardian Automatic Mode Temperature Limit of Medium Speed Registers (Index=72h, 6Ah, 62h, Default=7Fh) .........................................................................................13 3.4.40 FAN_CTL3-1 SmartGuardian Automatic Mode Temperature Limit of High Speed Registers (Index=73h, 6Bh, 63h, Default=7Fh) .........................................................................................13 3.4.41 FAN_CTL3-1 SmartGuardian Automatic Mode Over Temperature Limit Registers (Index=74h, 6Ch, 64h, Default=7Fh).............................................................................................................13 3.4.42 FAN_CTL3-1 SmartGuardian Automatic Mode Low Speed PWM Registers (Index=75h, 6Dh, 65h, Default=00h) .....................................................................................................................13 3.4.43 FAN_CTL3-1 SmartGuardian Automatic Mode Medium Speed PWM Registers (Index=76h, 6Eh, 66h, Default=00h) .....................................................................................................................13 3.4.44 FAN_CTL3-1 SmartGuardian Automatic Mode High Speed PWM Registers (Index=77h, 6Fh, 67h, Default=00h) .....................................................................................................................13 Operation.............................................................................................................................................14 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Power On RESET and Software RESET..........................................................................................14 Voltage and Temperature Inputs ......................................................................................................14 Analog to Digital Table for Monitoring Voltage ..................................................................................16 Layout and Grounding .....................................................................................................................24 Fan Tachometer ..............................................................................................................................24 Interrupt of the EC ...........................................................................................................................24 FAN Controller FAN_CTL' s ON-OFF and SmartGuardian Modes .....................................................25
4.
Figures
Figure 2-1. EC Voltage Monitor Control Flow Chart ........................................................................................2 Figure 2-2. EC Temperature Monitor Control Flow Chart ................................................................................3 Figure 2-3. Fan Monitor and EC Control Flow Chart .......................................................................................4 Figure 4-1. Application Example. Resistor should provide approximately 2V at the Analog Inputs .................15 Figure 4-2. Temperature Interrupt Response Diagram..................................................................................25 Figure 4-3. SmartGuardian Automatic Mode.................................................................................................26
Tables
Table 3-1. Address Map on the LPC Bus........................................................................................................5 Table 4-1. Analog to Digital Table for Monitoring Voltage..............................................................................16 Table 4-2. Global Configuration Registers ....................................................................................................26 Table 4-3. GPIO Configuration Registers......................................................................................................27
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Preliminary V0.3
IT8705F EC Programming Guide
1. Overview
The Environment Controller (EC), built in the IT8705F, includes eight voltage inputs, three temperature sensor inputs, three FANs' tachometer inputs, and three sets of advanced FAN Controllers. The EC monitors the hardware environment and implements environmental control for personal computer systems. The IT8705F contains an 8-bit ADC (Analog-to-Digital Converter) responsible for monitoring the voltages and temperatures. The ADC converts the analog inputs, ranging from 0V to 4.096V, to 8-bit digital bytes. Thanks to the additional external components, the analog inputs are able to monitor different voltage ranges, in addition to monitoring the fixed input range of 0V to 4.096V. Through the external thermistors, the temperature sensor inputs can be converted to 8-bit digital bytes, enabling the sensor inputs, and monitoring the temperature around the thermistors or thermal diode. A built-in ROM is also provided to adjust the non-linear characteristics of thermistors. FAN Tachometer inputs are digital inputs with an acceptable input range of 0V to 5V, and are responsible for measuring the FAN' s Tachometer pulse periods. FAN_TAC1 and FAN_TAC2 are included with programmable divisors, and can be used to measure different fan speed ranges. FAN_TAC3 is included in the fixed divisor, and can only be used in the default range. The EC of the IT8705F provides multiple internal registers and an interrupt generator for programmers to monitor the environment and control the FANs. Both the LPC Bus and Serial Bus interfaces are supported to accommodate the various applications' needs.
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2. Flow Charts
The coding flow chart of the voltage monitor of the EC is illustrated in Figure 2-1. The coding flow chart of the Temperature monitor of the EC flow charts is illustrated in Figure 2-2. The flow chart of the Fan monitor and control of the EC is illustrated in Figure 2-3.
Enter I/O configuration mode. Save original value.
Set LDN=04h (E.C.). Select interrupt level. Get E.C. base address. Enable Environment Control. Global configuration sequence completed.
Set E.C. Configuration. Clear interrupt status. Set SMI# mask. Set interrupt mask. Set voltage high and low limits. ADC voltage enable.
no
Enable Beep action? yes
Set LDN=07h (GPIO). Select GPIO Functon pin. Set interrupt pull-up enabled. Set hardware beep pin. Global configuration sequence completed.
Set LDN=04h (E.C.). Global configuration sequence completed. Select beep enable event from voltage. Set beep Frequency divisor of voltage event.
Read Monitored data.
yes Continue monitoring? no Enter I/O configuration mode. Disable Environment control. Restore original value.
Figure 2-1. EC Voltage Monitor Control Flow Chart 2 Mar. 01, 2001
IT8705F EC Programming Guide
Enter I/O configuration mode. Save original value.
Set LDN=04h (E.C.). Select interrupt level. Get E.C. base address. Enable Environment Control. Global configuration sequence completed.
Set E.C. Configuration. Clear interrupt status. Set SMI# mask. Set interrupt mask. Set temperature high limit. Select thermal mode.
no Enable Beep action?
yes Set LDN=07h (GPIO). Select GPIO Functon pin. Set interrupt pull-up enabled. Set hardware beep pin. Global configuration sequence completed.
Set LDN=04h (E.C.). Global configuration sequence completed. Select beep enable event from temperature. Set beep Frequency divisor of voltage event.
Read Monitored data.
yes Continue monitoring?
no
Enter I/O configuration mode. Disable Environment control. Restore original value.
Figure 2-2. EC Temperature Monitor Control Flow Chart
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IT8705F EC Programming Guide
Enter I/O configuration mode. Save original value.
Set LDN=04h (E.C.). Select interrupt level. Get E.C. base address. Enable Environment Control. Global configuration sequence completed.
Set E.C. Configuration. Clear interrupt status. Set SMI# mask and interrupt mask. Set Fan low limit and tachometer divisor. Set Fan enabled.
no Enable Beep action? yes Set LDN=07h (GPIO). Select GPIO Functon pin. Set interrupt pull-up enabled. Set hardware beep pin. Global configuration sequence completed. Set LDN=04h (E.C.). Global configuration sequence completed. Select Fan enable of beep event. Set beep Frequency divisor of voltage event.
ON/OFF mode Output mode?
SmartGuardian mode
Automatic operation
SmartGuardian operation? Software operation Set PWM control (Set Fan speed).
Set Fan ON or OFF.
Set Fan OFF/low speed/medium speed/high speed/over limit of temperature. Set Fan low speed/medium speed/high speed PWM.
Read Monitored data.
yes
Continue monitoring?
no
Enter I/O configuration mode. Disable Environment control. Restore original value.
Figure 2-3. Fan Monitor and EC Control Flow Chart 4 Mar. 01, 2001
IT8705F EC Programming Guide
3. Programming Guide
3.1 Interfaces The Environment Controller of the IT8705F decodes two addresses. Table 3-1. Address Map on the LPC Bus Register or Port
Address register of the EC Data register of the EC
Address
Base+05h Base+06h
Note 1. The Base Address is determined by the Logical Device configuration registers of the Environment Controller (LDN=04h, registers index= 60h, 61h).
To access an EC register, the address of the register is written to the address port (Base+05h). Read or write data from or to that register via data port (Base+06h). 3.2 Set Configuration Registers The configuration registers must be set first: set LDN=04h for IT8705F. Activate the Environment Controller. Select the base address from Environment Controller Base Address MSB register (Index=60h) and Base Address LSB register (Index=61h). Select the Environment Controller interrupt level from the register of Environment Controller Interrupt Level Select (Index=70h). Make sure to hook the operation system interrupt and create the interrupt service routine, too. Table 3-2. Environment Controller Configuration Registers Index R/W Reset Configuration Register or Action
30h 60h 61h 70h F3h R/W R/W R/W R/W R/W 00h 03h 10h 0Bh 00h Environment Controller Activate Environment Controller Base Address MSB Register Environment Controller Base Address LSB Register Environment Controller Interrupt Level Select Environment Controller Special Configuration Register
LDN
04h 04h 04h 04h 04h
3.3 Pre-settings for EC Monitoring Process The monitoring function in the EC is activated when the bit 3 of Configuration Register is cleared (low) and bit 0 of Configuration Register is set (high). Otherwise, several enable bits should be set to enable the monitoring function. Those enable bits are categorized into three groups: positive voltages, temperatures and FAN Tachometer inputs. Before the EC monitoring function can be used, the steps below should be followed: 1. Set the Limits 2. Set the interrupt Masks 3. Set the Enable bits The EC monitoring process can be then started.
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Note 1. Please refer to Figure 2-1 (EC Voltage Monitor Control flow chart) to set the Voltage monitor of the hardware monitor controller. Note 2. Please refer to Figure 2-2 (EC Temperature Monitor Control flow chart) to set the Temperature Controller/Monitor of the hardware monitor controller. Note 3. Please refer to Figure 2-3 (Fan Monitor and EC Control flow chart) to set the Fan Controller/Monitor of the hardware monitor controller. Note 4. Please refer to Table 4-2 Global Configuration Registers and Table 4-3 GPIO Configuration Registers for GPIO setting. 3.4 Register Description 3.4.1 Configuration Register (Index=00h, Default=18h) Bit R/W
7 6 5 4 3 2 1 0 R/W R/W R/W R R/W R/W R/W R/W
Description
Initialization. A "1" restores all registers to their individual default values, except the Serial Bus Address register. This bit clears itself when the default value is "0". Update VBAT Voltage Reading. Reserved Read Only, Always "1". INT_Clear. A "1" disables the SMI# and IRQ outputs with the contents of interrupt status bits remain unchanged. IRQ enables the IRQ Interrupt output. SMI# Enable. A "1" enables the SMI# Interrupt output. Start. A "1" enables the startup of monitoring operations while a "0" sends the monitoring operation in the STANDBY mode.
3.4.2 Interrupt Status Register 1 (Index=01h, Default=00h) Reading this register will clear itself following a read access. Bit R/W Description
7-6 5 4 3 2-0 R R R R R Reserved A "1" indicates a WTI# signal has been activated. A "1" indicates a Case Open event has occurred. Reserved A "1" indicates the FAN_TAC3-1 Count limit has been reached.
3.4.3 Interrupt Status Register 2 (Index=02h, Default=00h) Reading this register will clear itself after the read operation is completed. Bit R/W Description
7-0 R A "1" indicates a High or Low limit of VIN7-0 has been reached.
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3.4.4 Interrupt Status Register 3 (Index=03h, Ddfault=00h) Reading this register will clear itself following a read access. Bit R/W Description
7-3 2-0 R R Reserved A "1" indicates a High or Low limit of Temperature 3-1 has been reached.
3.4.5 SMI# Mask Register 1 (Index=04h, Default=00h) Bit R/W
7-6 5 4 3 2-0 R/W R/W R/W R/W R/W Reserved A "1" disables the WTI# Intrusion interrupt status bit for SMI#. A "1" disables the Case Open Intrusion interrupt status bit for SMI#. Reserved A "1" disables the FAN_TAC3-1 interrupt status bit for SMI#.
Description
3.4.6 SMI# Mask Register 2 (Index=05h, Default=00h) Bit R/W
7-0 R/W
Description
A "1" disables the VIN7-0 interrupt status bit for SMI#.
3.4.7 SMI# Mask Register 3 (Index=06h, Default=00h) Bit R/W
7-3 2-0 R/W R/W Reserved A "1" disables the Temperature 3-1 interrupt status bit for SMI#.
Description
3.4.8 Interrupt Mask Register 1 (Index=07h, Default=00h) Bit R/W
7-6 5 4 3 2-0 R/W R/W R/W R/W R/W Reserved A "1" disables the WTI# Intrusion interrupt status bit for IRQ. A "1" disables the Case Open Intrusion interrupt status bit for IRQ. Reserved A "1" disables the FAN_TAC3-1 interrupt status bit for IRQ.
Description
3.4.9 Interrupt Mask Register 2 (Index=08h, Default=00h) Bit R/W
7-0 R/W
Description
A "1" disables the VIN7-0 interrupt status bit for IRQ.
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3.4.10 Interrupt Mask Register 3 (Index=09h, Default=00h) Bit R/W
7-3 2-0 R/W R/W Reserved A "1" disables the Temperature 3-1 interrupt status bit for IRQ.
Description
3.4.11 VID Register (Index=0Ah) Bit R/W
7-5 4-0 R Reserved VID4-0 inputs.
Description
3.4.12 Fan Tachometer Divisor Register (Index=0Bh, Default=09h) Bit R/W
7-6 Reserved FAN_TAC2 Counter Divisor. 000 - divided by 1; 5-3 R/W 001 - divided by 2; 010 - divided by 4; 011 - divided by 8; 000 - divided by 1; 2-0 R/W 001 - divided by 2; 010 - divided by 4; 011 - divided by 8; 100 - divided by 16; 101 - divided by 32; 110 - divided by 64; 111 - divided by 128. 100 - divided by 16; 101 - divided by 32; 110 - divided by 64; 111 - divided by 128.
Description
FAN_TAC1 Counter Divisor.
3.4.13 Fan Tachometer 1-3 Reading Registers (Index=0Dh-0Fh) Bit R/W
7-0 R
Description
The number of counts of the internal clock per revolution.
3.4.14 Fan Tachometer 1-3 Limit Registers (Index=10h-12h) Bit R/W
7-0 R Limit value.
Description
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IT8705F EC Programming Guide
3.4.15 Fan Controller Main Control Register (Index=13h, Default=00h) Bit R/W
7 6-4 3 2-0 R R/W R/W R/W Reserved FAN_TAC3-1 enable. Reserved FAN_CTL3-1 output mode selection. 0: ON/OFF mode. 1: SmartGuardian mode.
Description
3.4.16 FAN_CTL Control Register (Index=14h, Default=00h) Bit R/W
7 6-3 2-0 R R/W R/W FAN_CTL Parity. Reserved FAN_CTL3-1 ON/OFF mode control. These bits are only available when the relative output modes are selected in ON/OFF mode. 0: OFF. 1: ON.
Description
3.4.17 FAN_CTL1 PWM Control Register (Index=15h, Default=00h) Bit R/W
7 R/W 0: Software operation.
Description
FAN_CTL1 PWM mode Automatic/Software operation selection. 1: Automatic operation. 128 steps of PWM control when in Software operation (bit 7=0), or Temperature input selection when in Automatic operation (bit 7=1). Bits[1:0]: 00: TMPIN1 01: TMPIN2 10: TMPIN3 11: Reserved
6-0
R/W
3.4.18 FAN_CTL2 PWM Control Register (Index=16h, Default=00h) Bit R/W
7 R/W 0: Software operation.
Description
FAN_CTL2 PWM mode Automatic/Software operation selection. 1: Automatic operation. 128 steps of PWM control when in Software operation (bit 7=0), or Temperature input selection when in Automatic operation (bit 7=1). Bits[1:0]: 00: TMPIN1 01: TMPIN2 10: TMPIN3 11: Reserved
6-0
R/W
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3.4.19 FAN_CTL3 PWM Control Register (Index=17h, Default=00h) Bit R/W
7 R/W 0: Software operation.
Description
FAN_CTL3 PWM mode Automatic/Software operation selection. 1: Automatic operation. 128 steps of PWM control when in Software operation (bit 7=0), or Temperature input selection when in Automatic operation (bit 7=1). Bits[1:0]: 00: TMPIN1 01: TMPIN2 10: TMPIN3 11: Reserved
6-0
R/W
3.4.20 VIN7-VIN0 Voltage Reading Registers (Index=27h-20h) Bit R/W
7-0 R/W Voltage Reading value.
Description
3.4.21 VBAT Voltage Reading Register (Index=28h) Bit R/W
7-0 R/W VBAT Voltage Reading value.
Description
3.4.22 TMPIN3-1 Temperature Reading Registers (Index=2Bh-29h) Bit R/W
7-0 R/W Temperature Reading value.
Description
3.4.23 VIN7-0 High Limit Registers (Index=3Eh, 3Ch, 3Ah, 38h, 36h, 34h, 32h, 30h) Bit R/W
7-0 R/W High Limit value.
Description
3.4.24 VIN7-0 Low Limit Registers (Index=3Fh, 3Dh, 3Bh, 39h, 37h, 35h, 33h, 31h) Bit R/W
7-0 R/W Low Limit value.
Description
3.4.25 TMPIN3-1 High Limit Registers (Index=44h, 42h, 40h) Bit R/W
7-0 R/W High Limit value.
Description
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3.4.26 TMPIN3-1 Low Limit Registers (Index=45h, 43h, 41h) Bit R/W
7-0 R/W Low Limit value.
Description
3.4.27 Serial Bus Interface Address Register (Index=48h, Default=2Dh) Bit R/W
7 6-0 R/W R/W Reserved Serial Bus Interface Address.
Description
3.4.28 ADC Voltage Channel Enable Register (Index=50h, Default=00h) Bit R/W
7-0 R/W ADC VIN7-VIN0 scan enable.
Description
3.4.29 ADC Temperature Channel Enable Register (Index=51h, Default=00h) TMPIN3-1 cannot be enabled in both Thermal Resistor mode and Thermal Diode (Diode connected Transistor) mode. Bit R/W
7-6 5-3 2-0 R/W R/W R/W Reserved TMPIN3-1 are enabled in Thermal Resistor mode. TMPIN3-1 are enabled in Thermal Diode (or Diode connected Transistor) mode.
Description
3.4.30 TMPIN3-1 Thermal Output Limit Registers (Index=54h-52h, Default=7Fh) Bit R/W
7-0 R/W Thermal Output Limit value.
Description
3.4.31 Vendor ID Register (Index=58h, Default=90h) Bit R/W
7-0 R ITE Vendor ID. Read Only.
Description
3.4.32 Thermal Diode Zero Degree Adjust Register (Index=59h, Default=56h) This register is read only unless the bit 7 of 5Ah is set. Bit R/W
7-0 R/W
Description
Thermal Diode Zero Degree voltage value (default: 0.664V 156h).
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3.4.33 Beep Event Enable Register (Index=5Ch, Default=00h)
Bit 7 6-3 2 1 0 R/W R/W R/W R/W R/W R/W Reserved Enables Beep action when TMPINs exceed limit. Enables Beep action when VINs exceed limit. Enables Beep action when FAN_TACs exceed limit.
Description
Thermal Diode Zero Degree Adjust register write enable.
3.4.34 Beep Frequency Divisor of Fan Event Register (Index=5Dh, Default=00h) Bit R/W
7-4 3-0 R/W R/W Tone divisor. Tone=500/(bits[7:4]+1). Frequency divisor. Frequency=10K/(bits[3:0]+1).
Description
3.4.35 Beep Frequency Divisor of Voltage Event Register (Index=5Eh, Default=00h) Bit R/W
7-4 3-0 R/W R/W Tone divisor. Tone=500/(bits[7:4]+1). Frequency divisor. Frequency=10K/(bits[3:0]+1).
Description
3.4.36 Beep Frequency Divisor of Temperature Event Register (Index=5Fh, Default=00h) Bit R/W
7-4 3-0 R/W R/W Tone divisor. Tone=500/(bits[7:4]+1). Frequency divisor. Frequency=10K/(bits[3:0]+1).
Description
3.4.37 FAN_CTL3-1 SmartGuardian Automatic Mode Temperature Limit of OFF Registers (Index=70h, 68h, 60h, Default=7Fh) Bit R/W
7-0 R/W Temperature Limit value of Fan OFF.
Description
3.4.38 FAN_CTL3-1 SmartGuardian Automatic Mode Temperature Limit of Low Speed Registers (Index=71h, 69h, 61h, Default=7Fh) Bit R/W
7-0 R/W
Description
Temperature Limit value of Fan Low speed.
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3.4.39 FAN_CTL3-1 SmartGuardian Automatic Mode Temperature Limit of Medium Speed Registers (Index=72h, 6Ah, 62h, Default=7Fh) Bit R/W
7-0 R/W
Description
Temperature Limit value of Fan Medium speed.
3.4.40 FAN_CTL3-1 SmartGuardian Automatic Mode Temperature Limit of High Speed Registers (Index=73h, 6Bh, 63h, Default=7Fh) Bit R/W
7-0 R/W
Description
Temperature Limit value of Fan High speed.
3.4.41 FAN_CTL3-1 SmartGuardian Automatic Mode Over Temperature Limit Registers (Index=74h, 6Ch, 64h, Default=7Fh) Bit R/W
7-0 R/W Over Temperature Limit value.
Description
3.4.42 FAN_CTL3-1 SmartGuardian Automatic Mode Low Speed PWM Registers (Index=75h, 6Dh, 65h, Default=00h) Bit R/W
7 6-0 R/W R/W Reserved PWM value of Low speed.
Description
3.4.43 FAN_CTL3-1 SmartGuardian Automatic Mode Medium Speed PWM Registers (Index=76h, 6Eh, 66h, Default=00h) Bit R/W
7 6-0 R/W R/W Reserved PWM value of Medium speed.
Description
3.4.44 FAN_CTL3-1 SmartGuardian Automatic Mode High Speed PWM Registers (Index=77h, 6Fh, 67h, Default=00h) Bit R/W
7 6-0 R/W R/W Reserved PWM value of High speed.
Description
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IT8705F EC Programming Guide
4. Operation
4.1 Power On RESET and Software RESET When the system power is first applied, the EC performs a "power on reset" on the registers with default values (due to system hardware reset), and the EC will acquire a monitored value before it goes inactive. The ADC is active to monitor the VBAT pin and then goes inactive. Except the function of the Serial Bus Interface Address register, a software reset (bit 7 of Configuration register) is able to accomplish all the functions as the hardware reset does. 4.2 Voltage and Temperature Inputs The 8-bit ADC has a 16mV LSB, with a 0V to 4.096V input range. The 2.5V and 3.3V supplies of PC applications can be directly connected to the inputs. The 5V and 12V inputs should be divided to the acceptable range. When the dividing circuit is used to measure the positive voltage, the recommended range for Ra and Rb is from 10K to 100K. The negative voltage can be measured by the same divider unless the divider is connected to VREF (constant voltage, 4.096V), not ground. The temperature measurement system of the EC converts the voltage of the TMPINs to 8-bit two' s-complement. The system also includes an OP amp providing a constant voltage. It also additionally includes an external thermistor, a constant resistance, the ADC and a conversion table ROM. Temperature + 125C + 25C + 1C + 0C - 1C - 25C - 55C Digital Output Format Binary Hex 01111101 7Dh 00011001 19h 00000001 01h 00000000 00h 11111111 FFh 11100111 E7h 11001001 C9h
With the addition of the external application circuit, the actual voltages are calculated as below: Positive Voltage: Vs = Vin X (Ra+Rb) / Rb Negative Voltage: Vs = (1+Rin/Rf)XVin - (Rin/Rf)XVREF All the analog inputs are equipped with the internal diodes that clamps the input voltage exceeding the power supply and ground. But, the current limiting input resistor is recommended when no dividing circuit is available.
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IT8705F EC Programming Guide
VREF
Rc=30K
VREF
Rc=30K
VREF
Rc=10K
Tin TD
Tin TD
Tin Rt
TMPIN1 TMPIN2 TMPIN3
VS
(-12V,-5V)
Vin Rin Rf VREF Vin
Vin
VS
Ra Rb
Battery Voltage
VIN0 VIN1 VIN2 VIN3 VIN4 VIN5 VIN6 VIN7 VBAT
ADC and MUX
Figure 4-1. Application Example. Resistor should provide approximately 2V at the Analog Inputs
15
+
VREF
Constant Voltage
Mar. 01, 2001
IT8705F EC Programming Guide
4.3 Analog to Digital Table for Monitoring Voltage Table 4-1. Analog to Digital Table for Monitoring Voltage
(Sheet1 of 8)
Hex 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21
Dec 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
Vref 0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 320 336 352 368 384 400 416 432 448 464 480 496 512 528 mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV
Monitoring 5 0 0.02688 0.05376 0.08064 0.10752 0.1344 0.16128 0.18816 0.21504 0.24192 0.2688 0.29568 0.32256 0.34944 0.37632 0.4032 0.43008 0.45696 0.48384 0.51072 0.5376 0.56448 0.59136 0.61824 0.64512 0.672 0.69888 0.72576 0.75264 0.77952 0.8064 0.83328 0.86016 0.88704
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring 12 0 0.064 0.128 0.192 0.256 0.32 0.384 0.448 0.512 0.576 0.64 0.704 0.768 0.832 0.896 0.96 1.024 1.088 1.152 1.216 1.28 1.344 1.408 1.472 1.536 1.6 1.664 1.728 1.792 1.856 1.92 1.984 2.048 2.112 16
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -5 -16.9691 -16.8869 -16.8046 -16.7223 -16.64 -16.5577 -16.4754 -16.3931 -16.3109 -16.2286 -16.1463 -16.064 -15.9817 -15.8994 -15.8171 -15.7349 -15.6526 -15.5703 -15.488 -15.4057 -15.3234 -15.2411 -15.1589 -15.0766 -14.9943 -14.912 -14.8297 -14.7474 -14.6651 -14.5829 -14.5006 -14.4183 -14.336 -14.2537
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -12 -8.7771 -8.7269 -8.6766 -8.6263 -8.576 -8.5257 -8.4754 -8.4251 -8.3749 -8.3246 -8.2743 -8.224 -8.1737 -8.1234 -8.0731 -8.0229 -7.9726 -7.9223 -7.872 -7.8217 -7.7714 -7.7211 -7.6709 -7.6206 -7.5703 -7.52 -7.4697 -7.4194 -7.3691 -7.3189 -7.2686 -7.2183 -7.168 -7.1177
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Mar. 01, 2001
IT8705F EC Programming Guide
Table 4-1. Analog to Digital Table for Monitoring Voltage (cont' d)
(Sheet 2 of 8)
Hex 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40 41 42 43 44
Dec 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68
Vref 544 560 576 592 608 624 640 656 672 688 704 720 736 752 768 784 800 816 832 848 864 880 896 912 928 944 960 976 992 1008 1024 1040 1056 1072 1088 mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV
Monitoring 5 0.91392 0.9408 0.96768 0.99456 1.02144 1.04832 1.0752 1.10208 1.12896 1.15584 1.18272 1.2096 1.23648 1.26336 1.29024 1.31712 1.344 1.37088 1.39776 1.42464 1.45152 1.4784 1.50528 1.53216 1.55904 1.58592 1.6128 1.63968 1.66656 1.69344 1.72032 1.7472 1.77408 1.80096 1.82784
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring 12 2.176 2.24 2.304 2.368 2.432 2.496 2.56 2.624 2.688 2.752 2.816 2.88 2.944 3.008 3.072 3.136 3.2 3.264 3.328 3.392 3.456 3.52 3.584 3.648 3.712 3.776 3.84 3.904 3.968 4.032 4.096 4.16 4.224 4.288 4.352
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -5 -14.1714 -14.0891 -14.0069 -13.9246 -13.8423 -13.76 -13.6777 -13.5954 -13.5131 -13.4309 -13.3486 -13.2663 -13.184 -13.1017 -13.0194 -12.9371 -12.8549 -12.7726 -12.6903 -12.608 -12.5257 -12.4434 -12.3611 -12.2789 -12.1966 -12.1143 -12.032 -11.9497 -11.8674 -11.7851 -11.7029 -11.6206 -11.5383 -11.456 -11.3737
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -12 -7.0674 -7.0171 -6.9669 -6.9166 -6.8663 -6.816 -6.7657 -6.7154 -6.6651 -6.6149 -6.5646 -6.5143 -6.464 -6.4137 -6.3634 -6.3131 -6.2629 -6.2126 -6.1623 -6.112 -6.0617 -6.0114 -5.9611 -5.9109 -5.8606 -5.8103 -5.76 -5.7097 -5.6594 -5.6091 -5.5589 -5.5086 -5.4583 -5.408 -5.3577
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
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IT8705F EC Programming Guide
Table 4-1. Analog to Digital Table for Monitoring Voltage (cont' d)
(Sheet 3 of 8)
Hex 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67
Dec 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103
Vref 1104 1120 1136 1152 1168 1184 1200 1216 1232 1248 1264 1280 1296 1312 1328 1344 1360 1376 1392 1408 1424 1440 1456 1472 1488 1504 1520 1536 1552 1568 1584 1600 1616 1632 1648 mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV
Monitoring 5 1.85472 1.8816 1.90848 1.93536 1.96224 1.98912 2.016 2.04288 2.06976 2.09664 2.12352 2.1504 2.17728 2.20416 2.23104 2.25792 2.2848 2.31168 2.33856 2.36544 2.39232 2.4192 2.44608 2.47296 2.49984 2.52672 2.5536 2.58048 2.60736 2.63424 2.66112 2.688 2.71488 2.74176 2.76864
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring 12 4.416 4.48 4.544 4.608 4.672 4.736 4.8 4.864 4.928 4.992 5.056 5.12 5.184 5.248 5.312 5.376 5.44 5.504 5.568 5.632 5.696 5.76 5.824 5.888 5.952 6.016 6.08 6.144 6.208 6.272 6.336 6.4 6.464 6.528 6.592
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -5 -11.2914 -11.2091 -11.1269 -11.0446 -10.9623 -10.88 -10.7977 -10.7154 -10.6331 -10.5509 -10.4686 -10.3863 -10.304 -10.2217 -10.1394 -10.0571 -9.97486 -9.89257 -9.81029 -9.728 -9.64571 -9.56343 -9.48114 -9.39886 -9.31657 -9.23429 -9.152 -9.06971 -8.98743 -8.90514 -8.82286 -8.74057 -8.65829 -8.576 -8.49371
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -12 -5.3074 -5.2571 -5.2069 -5.1566 -5.1063 -5.056 -5.0057 -4.9554 -4.9051 -4.8549 -4.8046 -4.7543 -4.704 -4.6537 -4.6034 -4.5531 -4.5029 -4.4526 -4.4023 -4.352 -4.3017 -4.2514 -4.2011 -4.1509 -4.1006 -4.0503 -4 -3.9497 -3.8994 -3.8491 -3.7989 -3.7486 -3.6983 -3.648 -3.5977
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
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IT8705F EC Programming Guide
Table 4-1. Analog to Digital Table for Monitoring Voltage (cont' d)
(Sheet 4 of 8)
Hex 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F 80 81 82 83 84 85 86 87 88 89 8A
Dec 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138
Vref 1664 1680 1696 1712 1728 1744 1760 1776 1792 1808 1824 1840 1856 1872 1888 1904 1920 1936 1952 1968 1984 2000 2016 2032 2048 2064 2080 2096 2112 2128 2144 2160 2176 2192 2208 mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV
Monitoring 5 2.79552 2.8224 2.84928 2.87616 2.90304 2.92992 2.9568 2.98368 3.01056 3.03744 3.06432 3.0912 3.11808 3.14496 3.17184 3.19872 3.2256 3.25248 3.27936 3.30624 3.33312 3.36 3.38688 3.41376 3.44064 3.46752 3.4944 3.52128 3.54816 3.57504 3.60192 3.6288 3.65568 3.68256 3.70944
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring 12 6.656 6.72 6.784 6.848 6.912 6.976 7.04 7.104 7.168 7.232 7.296 7.36 7.424 7.488 7.552 7.616 7.68 7.744 7.808 7.872 7.936 8 8.064 8.128 8.192 8.256 8.32 8.384 8.448 8.512 8.576 8.64 8.704 8.768 8.832
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -5 -8.41143 -8.32914 -8.24686 -8.16457 -8.08229 -8 -7.91771 -7.83543 -7.75314 -7.67086 -7.58857 -7.50629 -7.424 -7.34171 -7.25943 -7.17714 -7.09486 -7.01257 -6.93029 -6.848 -6.76571 -6.68343 -6.60114 -6.51886 -6.43657 -6.35429 -6.272 -6.18971 -6.10743 -6.02514 -5.94286 -5.86057 -5.77829 -5.696 -5.61371
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -12 -3.5474 -3.4971 -3.4469 -3.3966 -3.3463 -3.296 -3.2457 -3.1954 -3.1451 -3.0949 -3.0446 -2.9943 -2.944 -2.8937 -2.8434 -2.7931 -2.7429 -2.6926 -2.6423 -2.592 -2.5417 -2.4914 -2.4411 -2.3909 -2.3406 -2.2903 -2.24 -2.1897 -2.1394 -2.0891 -2.0389 -1.9886 -1.9383 -1.888 -1.8377
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
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IT8705F EC Programming Guide
Table 4-1. Analog to Digital Table for Monitoring Voltage (cont' d)
(Sheet 5 of 8)
Hex 8B 8C 8D 8E 8F 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD
Dec 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173
Vref 2224 2240 2256 2272 2288 2304 2320 2336 2352 2368 2384 2400 2416 2432 2448 2464 2480 2496 2512 2528 2544 2560 2576 2592 2608 2624 2640 2656 2672 2688 2704 2720 2736 2752 2768 mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV
Monitoring 5 3.73632 3.7632 3.79008 3.81696 3.84384 3.87072 3.8976 3.92448 3.95136 3.97824 4.00512 4.032 4.05888 4.08576 4.11264 4.13952 4.1664 4.19328 4.22016 4.24704 4.27392 4.3008 4.32768 4.35456 4.38144 4.40832 4.4352 4.46208 4.48896 4.51584 4.54272 4.5696 4.59648 4.62336 4.65024
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring 12 8.896 8.96 9.024 9.088 9.152 9.216 9.28 9.344 9.408 9.472 9.536 9.6 9.664 9.728 9.792 9.856 9.92 9.984 10.048 10.112 10.176 10.24 10.304 10.368 10.432 10.496 10.56 10.624 10.688 10.752 10.816 10.88 10.944 11.008 11.072
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -5 -5.53143 -5.44914 -5.36686 -5.28457 -5.20229 -5.12 -5.03771 -4.95543 -4.87314 -4.79086 -4.70857 -4.62629 -4.544 -4.46171 -4.37943 -4.29714 -4.21486 -4.13257 -4.05029 -3.968 -3.88571 -3.80343 -3.72114 -3.63886 -3.55657 -3.47429 -3.392 -3.30971 -3.22743 -3.14514 -3.06286 -2.98057 -2.89829 -2.816 -2.73371
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -12 -1.7874 -1.7371 -1.6869 -1.6366 -1.5863 -1.536 -1.4857 -1.4354 -1.3851 -1.3349 -1.2846 -1.2343 -1.184 -1.1337 -1.0834 -1.0331 -0.9829 -0.9326 -0.8823 -0.832 -0.7817 -0.7314 -0.6811 -0.6309 -0.5806 -0.5303 -0.48 -0.4297 -0.3794 -0.3291 -0.2789 -0.2286 -0.1783 -0.128 -0.0777
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
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IT8705F EC Programming Guide
Table 4-1. Analog to Digital Table for Monitoring Voltage (cont' d)
(Sheet 6 of 8)
Hex AE AF B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF D0
Dec 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208
Vref 2784 2800 2816 2832 2848 2864 2880 2896 2912 2928 2944 2960 2976 2992 3008 3024 3040 3056 3072 3088 3104 3120 3136 3152 3168 3184 3200 3216 3232 3248 3264 3280 3296 3312 3328 mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV
Monitoring 5 4.67712 4.704 4.73088 4.75776 4.78464 4.81152 4.8384 4.86528 4.89216 4.91904 4.94592 4.9728 4.99968 5.02656 5.05344 5.08032 5.1072 5.13408 5.16096 5.18784 5.21472 5.2416 5.26848 5.29536 5.32224 5.34912 5.376 5.40288 5.42976 5.45664 5.48352 5.5104 5.53728 5.56416 5.59104
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring 12 11.136 11.2 11.264 11.328 11.392 11.456 11.52 11.584 11.648 11.712 11.776 11.84 11.904 11.968 12.032 12.096 12.16 12.224 12.288 12.352 12.416 12.48 12.544 12.608 12.672 12.736 12.8 12.864 12.928 12.992 13.056 13.12 13.184 13.248 13.312
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -5 -2.65143 -2.56914 -2.48686 -2.40457 -2.32229 -2.24 -2.15771 -2.07543 -1.99314 -1.91086 -1.82857 -1.74629 -1.664 -1.58171 -1.49943 -1.41714 -1.33486 -1.25257 -1.17029 -1.088 -1.00571 -0.92343 -0.84114 -0.75886 -0.67657 -0.59429 -0.512 -0.42971 -0.34743 -0.26514 -0.18286 -0.10057 -0.01829 0.064 0.14629
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -12 -0.0274 0.02286 0.07314 0.12343 0.17371 0.224 0.27429 0.32457 0.37486 0.42514 0.47543 0.52571 0.576 0.62629 0.67657 0.72686 0.77714 0.82743 0.87771 0.928 0.97829 1.02857 1.07886 1.12914 1.17943 1.22971 1.28 1.33029 1.38057 1.43086 1.48114 1.53143 1.58171 1.632 1.68229
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
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IT8705F EC Programming Guide
Table 4-1. Analog to Digital Table for Monitoring Voltage (cont' d)
(Sheet 7 of 8)
Hex D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF F0 F1 F2 F3
Dec 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243
Vref 3344 3360 3376 3392 3408 3424 3440 3456 3472 3488 3504 3520 3536 3552 3568 3584 3600 3616 3632 3648 3664 3680 3696 3712 3728 3744 3760 3776 3792 3808 3824 3840 3856 3872 3888 mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV
Monitoring 5 5.61792 5.6448 5.67168 5.69856 5.72544 5.75232 5.7792 5.80608 5.83296 5.85984 5.88672 5.9136 5.94048 5.96736 5.99424 6.02112 6.048 6.07488 6.10176 6.12864 6.15552 6.1824 6.20928 6.23616 6.26304 6.28992 6.3168 6.34368 6.37056 6.39744 6.42432 6.4512 6.47808 6.50496 6.53184
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring 12 13.376 13.44 13.504 13.568 13.632 13.696 13.76 13.824 13.888 13.952 14.016 14.08 14.144 14.208 14.272 14.336 14.4 14.464 14.528 14.592 14.656 14.72 14.784 14.848 14.912 14.976 15.04 15.104 15.168 15.232 15.296 15.36 15.424 15.488 15.552 22
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -5 0.22857 0.31086 0.39314 0.47543 0.55771 0.64 0.72229 0.80457 0.88686 0.96914 1.05143 1.13371 1.216 1.29829 1.38057 1.46286 1.54514 1.62743 1.70971 1.792 1.87429 1.95657 2.03886 2.12114 2.20343 2.28571 2.368 2.45029 2.53257 2.61486 2.69714 2.77943 2.86171 2.944 3.02629
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Monitoring -12 1.73257 1.78286 1.83314 1.88343 1.93371 1.984 2.03429 2.08457 2.13486 2.18514 2.23543 2.28571 2.336 2.38629 2.43657 2.48686 2.53714 2.58743 2.63771 2.688 2.73829 2.78857 2.83886 2.88914 2.93943 2.98971 3.04 3.09029 3.14057 3.19086 3.24114 3.29143 3.34171 3.392 3.44229
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
Mar. 01, 2001
IT8705F EC Programming Guide
Table 4-1. Analog to Digital Table for Monitoring Voltage (cont' d)
(Sheet 8 of 8)
Hex F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF 100
Dec 244 245 246 247 248 249 250 251 252 253 254 255 256
Vref 3904 3920 3936 3952 3968 3984 4000 4016 4032 4048 4064 4080 4096 mV mV mV mV mV mV mV mV mV mV mV mV mV
Monitoring 5 6.55872 6.5856 6.61248 6.63936 6.66624 6.69312 6.72 6.74688 6.77376 6.80064 6.82752 6.8544 6.88128
V V V V V V V V V V V V V V
Monitoring 12 15.616 15.68 15.744 15.808 15.872 15.936 16 16.064 16.128 16.192 16.256 16.32 16.384
V V V V V V V V V V V V V V
Monitoring -5 3.10857 3.19086 3.27314 3.35543 3.43771 3.52 3.60229 3.68457 3.76686 3.84914 3.93143 4.01371 4.096
V V V V V V V V V V V V V V
Monitoring -12 3.49257 3.54286 3.59314 3.64343 3.69371 3.744 3.79429 3.84457 3.89486 3.94514 3.99543 4.04571 4.096
V V V V V V V V V V V V V V
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Mar. 01, 2001
IT8705F EC Programming Guide
4.4 Layout and Grounding A separate and low-impedance ground plane for analog ground is needed in achieving accurate measurement. The analog ground also provides a ground point for the voltage dividers including the temperature loops and analog components. Analog components such as voltage dividers, feedback resistors and the constant resistors of the temperature loops should be located as close as possible to the IT8705F. However, the thermistors of the temperature loops should be positioned at the measuring area. In addition, the power supply bypass, and the parallel combination of 10F and 0.1F bypass capacitors connected between VCC and analog ground, should also be located as close as possible to the IT8705F. Due to the small differential voltage of thermal diode (diode connected transistor), there are many PCB layout' s recommendations: - Position the sensor as close as possible - Ground of the sensor should be directly short to GNDA with excellent noise immunity - Keep trace away from the noise source. (High voltage, fast data bus, fast clock, CRTs ... ) - Wider trace width (10mil at least) and guard ground (flanking and under) are recommended - Position the noise filter and 0.1F bypass capacitors as close to IT8705F as possible 4.5 Fan Tachometer The Fan Tachometer inputs gate a 22.5kHz clock into an 8-bit counter (maximum count=255) for one period of the input signals. Several divisors, located in VID/FAN Divisor Register, are provided for FAN_TAC1 and FAN_TAC2, and are used to modify the monitoring range. FAN_TAC3 is not adjustable, and its divisor value is always set to 2. Counts are based on 2 pulses per revolution tachometer output. RPM = 1.35 X 106 / (Count X Divisor) The maximum input signal range is 0 to VCC. The additional application is needed to clamp the input voltage and current. 4.6 Interrupt of the EC The EC generates interrupts as a result of each of its Limit registers on the analog voltage, temperature, and FAN monitor. All the interrupts are indicated in two Interrupt Status Registers. The IRQ and SMI# outputs have individual mask registers. These two Interrupts can also be enabled/disabled in the Configuration Register. The Interrupt Status Registers will be reset after being read. When the Interrupt Status Registers are cleared, the Interrupt lines will also be cleared. When a read operation is completed before the completion of the monitoring loop sequence, it indicates an Interrupt Status Register has been cleared. Due to slow monitoring sequence, the EC needs 1.5 seconds to allow all the EC Registers to be safely updated between completed read operations. When the bit 3 of the Configuration Register is set to high, the Interrupt lines are cleared and the monitoring loop will be stopped. The loop will resume when this bit is cleared. All the analog voltage inputs have high and low Limit Registers that generate Interrupts, except that the FAN monitoring inputs only have low Limit Register to warn the host. The IT8705F provides two modes dedicated to temperature interrupts in the EC: "Interrupt" mode and "Comparator" mode. In "Interrupt" mode, an interrupt will be generated whenever the temperature exceeds Th limit, and the corresponding Interrupt status bits will be set to high until being reset by reading Interrupt Status Register. Once an interrupt event has occurred by crossing Th limit, then after being reset, an interrupt will only occur again when the temperature goes below TL limit. Again, it will set the status bit to high until being reset by reading the Interrupt Status Register. 24 Mar. 01, 2001
IT8705F EC Programming Guide
When the TL limit register is set to 127C, the temperature interrupts enter the "Comparator" mode. In this mode, an interrupt will be generated whenever the temperature exceeds the Th limit. The interrupt will also be cleared by reading the Interrupt Status Register, but the interrupt will be set again following the completion of another measurement cycle. It will remain set until the temperature goes below the Th limit.
Th TL Temperature Interrupt
Time (a) Interrupt Mode
TL = 127 C Th Temperature Interrupt
Time (b) Comparator Mode
Figure 4-2. Temperature Interrupt Response Diagram 4.7 FAN Controller FAN_CTL' s ON-OFF and SmartGuardian Modes The IT8705F provides advanced FAN Controllers. Two modes are provided for each controller: ON_OFF and SmartGuardian modes. The former is a logical ON or OFF, and the latter is a PWM output. With the addition of external application circuits, the FAN' s voltage values can be varied easily. There are also two mode options in the SmartGuardian mode: software and automatic modes. In the software mode, the PWM value is subject to the changes in the values of bits 6-0 of FAN_CTL PWM Control Register (Index=15h, 16h, 17h). With the application circuits, FAN_CTL can generate 128 steps of voltage. So, the FAN_CTL1-3 PWM Control Registers can vary the voltage by changing the PWM value. Fan speeds or other voltage control cooling device can be varied in 128 steps. In the automatic mode, the PWM value is subject to the specific temperature inputs by five stages (OFF, Low Level, Medium Level, High Level and Full ON). The PWM values of the Low, Medium and High Levels are pre-loaded. Each of FAN' s control sources (temperature inputs) can be any of the three temperature inputs, and are determined by bits 1-0 of FAN_CTL PWM Control Register (Index=15h, 16h, 17h). When the source temperature is below the Low Temperature (Index=71h, 69h, 61h), the FAN_CTL output will enter OFF state. When the temperature is between Low and Medium Temperature (Index=72h, 6Ah, 62h), the output will perform Low Level PWM; Medium Level PWM when between Medium and High Temperatures (Index=73h, 6Bh, 63h); High Level PWM when between the High and Over Temperatures (Index=74h, 6Ch, 64h). When any of the Over Temperature is exceeded, all the FAN_CTL outputs will be full ON. The FAN_CTL output will not return to the OFF state until the source temperature goes below the OFF Temperature limit (Index=70h, 68h, 60h). 25 Mar. 01, 2001
IT8705F EC Programming Guide
Over Temp.
High Temp. Medium Temp. Low Temp. OFF Temp. PWM Value State S0 S1 S2 S3 S4 S3 S2
Time
S3
S2 S1
S0
S1 S2
S0: OFF
S1: Low
S2: Medium
S3: High
S4: all FANs Full ON
Figure 4-3. SmartGuardian Automatic Mode
LDN
All All All All All All All 05h* 05h* 05h* 05h* 05h* 05h* F4h* F4h*
Index
02h 07h 20h 21h 22h 23h 24h 25h 26h 27h 28h 29h 2Ah 2Eh 2Fh
R/W
W R/W R R R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Table 4-2. Global Configuration Registers Reset Configuration Registers or Action
NA NA 87h 12h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h Configure Control Logical Device Number (LDN) Chip ID Byte 1 Chip ID Byte 2 Chip Version Clock Selection Register Software Suspend GPIO Set 1 Multi-Function Pin Selection Register GPIO Set 2 Multi-Function Pin Selection Register GPIO Set 3 Multi-Function Pin Selection Register GPIO Set 4 Multi-Function Pin Selection Register GPIO Set 5 Multi-Function Pin Selection Register GPIO Set 6 Multi-Function Pin Selection Register Test 1 Register Test 2 Register
Note: *: All these registers can be read from all LDNs.
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Mar. 01, 2001
IT8705F EC Programming Guide
Table 4-3. GPIO Configuration Registers R/W Reset Configuration Registers or Action
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h Simple I/O Base Address MSB Register Simple I/O Base Address LSB Register Panel Button De-bounce Base Address MSB Register Panel Button De-bounce Base Address LSB Register SMI# Normal Run Access Base Address MSB Register SMI# Normal Run Access Base Address LSB Register Panel Button De-bounce Interrupt Level Select Register GPIO Set 1 Pin Polarity Register GPIO Set 2 Pin Polarity Register GPIO Set 3 Pin Polarity Register GPIO Set 4 Pin Polarity Register GPIO Set 5 Pin Polarity Register GPIO Set 6 Pin Polarity Register GPIO Set 1 Pin Internal Pull-up Enable Register GPIO Set 2 Pin Internal Pull-up Enable Register GPIO Set 3 Pin Internal Pull-up Enable Register GPIO Set 4 Pin Internal Pull-up Enable Register GPIO Set 5 Pin Internal Pull-up Enable Register GPIO Set 6 Pin Internal Pull-up Enable Register Simple I/O Set 1 Enable Register Simple I/O Set 2 Enable Register Simple I/O Set 3 Enable Register Simple I/O Set 4 Enable Register Simple I/O Set 5 Enable Register Simple I/O Set 6 Enable Register Simple I/O Set 1 Output Enable Register Simple I/O Set 2 Output Enable Register Simple I/O Set 3 Output Enable Register Simple I/O Set 4 Output Enable Register Simple I/O Set 5 Output Enable Register Simple I/O Set 6 Output Enable Register Panel Button De-bounce Control Register Panel Button De-bounce Set 1 Enable Register Panel Button De-bounce Set 2 Enable Register Panel Button De-bounce Set 3 Enable Register Panel Button De-bounce Set 4 Enable Register Panel Button De-bounce Set 5 Enable Register Panel Button De-bounce Set 6 Enable Register SMI# Control Register Reserved SMI# Status Register SMI# Pin Mapping Register
LDN
05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h 05h
Index
60h 61h 62h 63h 64h 65h 70h B0h B1h B2h B3h B4h B5h B8h B9h BAh BBh BCh BDh C0h C1h C2h C3h C4h C5h C8h C9h CAh CBh CCh CDh D0h D1h D2h D3h D4h D5h D6h F0h F1h F2h F5h
27
Mar. 01, 2001
INTEGRATED TECHNOLOGY EXPRESS, INC. TERMS AND CONDITIONS OF SALE (Rev: May ` 98)
These Terms and Conditions of Sale apply to all items designed, sold and/or made by Integrated Technology Express, Inc. ("ITE Taiwan") and/or Integrated Technology Express, Inc. (" ITE California"), and Buyer agrees they apply to all such items.
0.
PARTIES
ITE Taiwan is a company headquartered in the Republic of China, Taiwan, and incorporated under Taiwan law, and ITE California is a separate company incorporated under California law and headquartered in California. These two companies are independent, and, except as to the entity which invoices for goods delivered to it, Buyer holds no rights against and has no commitments from ITE California and/or ITE Taiwan. Subject to the foregoing, "Seller" refers to the entity which invoices Buyer for product, provided however that both ITE Taiwan and ITE California shall each be entitled to claim protection under paragraphs 4(b)-4(f), 5, 8, 9, 10, 11, 12 and 13 below.
1.
ACCEPTANCE OF TERMS
OTHERWISE). THESE LIMITATIONS SHALL APPLY NOTWITHSTANDING ANY FAILURE OF ESSENTIAL PURPOSE OF ANY REMEDY. (e) No action against Seller, whether for breach, indemnification, contribution or otherwise, shall be commenced more than one year after the cause of action has accrued, or more than one year after either the Buyer, user or other person knew or with reasonable diligence should have known of the matter or of any claim of dissatisfaction or defect involved; and no such claim may be brought unless Seller has first been given commercially reasonable notice, a full written explanation of all pertinent details, and a good faith opportunity to resolve the matter. (f) BUYER EXPRESSLY AGREES TO THE LIMITATIONS OF THIS PARAGRAPH 5 AND TO THEIR REASONABLENESS.
BUYER ACCEPTS THESE TERMS (i) BY WRITTEN ACCEPTANCE (BY PURCHASE ORDER OR OTHERWISE), OR (ii) BY FAILURE TO RETURN GOODS DESCRIBED ON THE FACE OF THE PACKING LIST WITHIN FIVE DAYS OF THEIR DELIVERY.
6.
SUBSTITUTIONS AND MODIFICATIONS
2.
DELIVERY
(a) Delivery will be made Free Carrier (Incoterms), Seller's warehouse, Science-Based Industrial Park, Taiwan (if Seller is ITE Taiwan or ITE California) or Santa Clara, California (if Seller is ITE California). (b) Title to the goods and the entire risk will pass to Buyer upon delivery to carrier. (c) Shipments are subject to availability. Seller shall make every reasonable effort to meet the date(s) quoted or acknowledged; and if Seller makes such effort, Seller will not be liable for any delays.
Seller may at any time make substitutions for product ordered which do not materially and adversely affect overall performance with the then current specifications in the typical and intended use. Seller reserves the right to halt deliveries and shipments and alter specifications and prices without notice. Buyer shall verify that the literature and information is current before purchasing.
7.
CANCELLATION
3.
(a) The contract may not be canceled by Buyer except with written consent by Seller and Buyer's payment of reasonable cancellation charges (including but not be limited to expenses already incurred for labor and material, overhead, commitments made by Seller, and a reasonable profit). (b) In no event will Buyer have rights in partially completed goods.
TERMS OF PAYMENT
(a) Terms are as stated on Seller's quotation, or if none are stated, net thirty (30) days. Accounts past due will incur a monthly charge at the rate of one percent (1%) per month (or, if less, the maximum allowed by applicable law) to cover servicing costs. (b) Seller reserves the right to change credit terms at any time in its sole discretion.
8.
INDEMNIFICATION
4.
LIMITED WARRANTY
(a) Seller warrants that the goods sold will be free from defects in material and workmanship and comply with Seller's applicable published specifications for a period of ninety (90) days from the date of Seller' s delivery. (b) Goods or parts which have been subject to abuse (including without limitation repeated or extended exposure to conditions at or near the limits of applicable absolute ratings) misuse, accident, alteration, neglect, or unauthorized repair or improper application are not covered by any warranty. No warranty is made with respect to custom products or goods produced to Buyer's specifications (unless specifically stated in a writing signed by Seller). (c) No warranty is made with respect to goods used in devices intended for use in applications where failure to perform when properly used can reasonably be expected to result in significant injury (including, without limitation, navigation, aviation or nuclear equipment, or for surgical implant or to support or sustain life) and Buyer agrees to indemnify, defend, and hold harmless Seller from all claims, damages and liabilities arising out of any such uses. (d) This Paragraph 4 is the only warranty by Seller with respect to goods and may not be modified or amended except in writing signed by an authorized officer of Seller. (e) Buyer acknowledges and agrees that it is not relying on any applications, diagrams or circuits contained in any literature, and Buyer will test all parts and applications under extended field and laboratory conditions. Notwithstanding any cross-reference or any statements of compatibility, functionality, interchangeability, and the like, the goods may differ from similar goods from other vendors in performance, function or operation, and in areas not contained in the written specifications, or as to ranges and conditions outside such specifications; and Buyer agrees that there are no warranties and that Seller is not responsible for such things. (f) EXCEPT AS PROVIDED ABOVE, SELLER MAKES NO WARRANTIES OR CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY; AND SELLER EXPRESSLY EXCLUDES AND DISCLAIMS ANY WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE OR APPLICATION.
Seller will, at its own expense, assist Buyer with technical support and information in connection with any claim that any parts as shipped by Seller under this purchase order infringe any valid and enforceable copyright, or trademark, provided however, that Buyer (i) gives immediate written notice to Seller, (ii) permits Seller to participate and to defend if Seller requests to do so, and (iii) gives Seller all needed information, assistance and authority. However, Seller will not be responsible for infringements resulting from anything not entirely manufactured by Seller, or from any combination with products, equipment, or materials not furnished by Seller. Seller will have no liability with respect to intellectual property matters arising out of products made to Buyer's specifications, code, or designs. Except as expressly stated in this Paragraph 8 or in another writing signed by an authorized officer, Seller makes no representations and/or warranties with respect to intellectual and/or industrial property and/or with respect to claims of infringement. Except as to claims Seller agrees in writing to defend, BUYER WILL INDEMNIFY, DEFEND AND HOLD HARMLESS SELLER FROM ALL CLAIMS, COSTS, LOSSES, AND DAMAGES (INCLUDING ATTORNEYS FEES) AGAINST AND/OR ARISING OUT OF GOODS SOLD AND/OR SHIPPED HEREUNDER.
9.
10.
NO CONFIDENTIAL INFORMATION
Seller shall have no obligation to hold any information in confidence except as provided in a separate non-disclosure agreement signed by both parties.
ENTIRE AGREEMENT
(a) These terms and conditions are the entire agreement and the only representations and understandings between Seller and Buyer, and no addition, deletion or modification shall be binding on Seller unless expressly agreed to in a writing signed by an officer of Seller. (b) Buyer is not relying upon any warranty or representation except for those specifically stated here.
11.
APPLICABLE LAW
5.
LIMITATION OF LIABILITY
(a) Seller will not be liable for any loss, damage or penalty resulting from causes beyond its reasonable control, including but not limited to delay by others, force majeure, acts of God, or labor conditions. In any such event, the date(s) for Seller's performance will be deemed extended for a period equal to any delay resulting. (b) THE LIABILITY OF SELLER ARISING OUT OF THE CONTRACT OR ANY GOODS SOLD WILL BE LIMITED TO REFUND OF THE PURCHASE PRICE OR REPLACEMENT OF PURCHASED GOODS (RETURNED TO SELLER FREIGHT PRE-PAID) OR, WITH SELLER' S PRIOR WRITTEN CONSENT, REPAIR. (c) Buyer will not return any goods without first obtaining a customer return order number. (d) AS A SEPARATE LIMITATION, IN NO EVENT WILL SELLER BE LIABLE FOR COSTS OF SUBSTITUTE GOODS; FOR ANY SPECIAL, CONSEQUENTIAL, INCIDENTAL OR INDIRECT DAMAGES; OR LOSS OF USE, OPPORTUNITY, MARKET POTENTIAL, AND/OR PROFIT ON ANY THEORY (CONTRACT, TORT, FROM THIRD PARTY CLAIMS OR
The contract and all performance and disputes arising out of or relating to goods involved will be governed where Seller is ITE Taiwan by the laws of Taiwan, Republic of China or, where Seller is ITE California, by the laws of California and the United States of America, in either event without reference to the U.N. Convention on Contracts for the International Sale of Goods or to conflict of laws principles. Buyer agrees at its sole expense to comply with all applicable laws in connection with the purchase, use or sale of the goods provided hereunder and to indemnify Seller from any failure by Buyer to so comply. Without limiting the foregoing, Buyer certifies that no technical data or direct products thereof will be made available or re-exported, directly or indirectly, to any country to which such export or access is prohibited or restricted under U.S. law or regulations, unless prior authorization is obtained from the appropriate officials and agencies of the government as required under U.S. laws and regulations.
12.
JURISDICTION AND VENUE
Where Seller is ITE Taiwan, the courts located in Hsinchu, Taiwan, Republic of China, will have the sole and exclusive jurisdiction and venue over any dispute arising out of or relating to the contract or any sale of goods hereunder. Where Seller is ITE California, the courts located in Santa Clara County, California, USA, will have the sole and exclusive jurisdiction and venue over any dispute arising out of or relating to the contract or any sale of goods hereunder. Buyer hereby consents to the jurisdiction of such courts.
13.
ATTORNEYS' FEES
Reasonable attorneys' fees and costs will be awarded to the prevailing party in the event of litigation involving and/or relating to the enforcement or interpretation of the contract and/or any goods sold under it.
www.ite.com.tw www.iteusa.com
HEADQUARTERS: 3F, No. 13, Innovation Rd.1, Science-Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel: 886-3-5798658 Fax: 886-3-5794803
ASIA SALES OFFICE: 7F, No. 435, Nei Hu District, Jui Kuang Road, Taipei 114, Taiwan, R.O.C. Tel: 886-2-26579896 Fax: 886-2-26578561, 26578576 Contact Person: Willy Peng E-mail: willy.peng@ite.com.tw
ITE (U.S.A. West) Inc.: 1235 Midas Way, Sunnyvale, CA 94086, U.S.A. Tel: (408) 5308860 Fax: (408) 5308861 Contact Person: David Lin E-mail: david.lin@iteusa.com
ITE (U.S.A. Eastern) Inc.: 896 Summit St., #105, Round Rock, TX 78664, U.S.A. Tel: (512) 3887880 Fax: (512) 3883108 Contact Person: Don Gardenhire E-mail: don.gardenhire@iteusa.com

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