ADT7463 Configurations

AN-612
APPLICATION NOTE
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ADT7463 Configurations
by Mary Burke
4. VCC Measured Internally through Pin 4.
5. CPU Core Voltage Measurement (VCORE).
6. 2.5 V Measurement Input Used to Monitor CPU
Current (connected to VCOMP output of ADP316x VRM
controller). This is used to determine CPU power
consumption.
7. 5 V Measurement Input.
8. VRM temperature uses local temperature sensor.
9. CPU Temperature Measured Using Remote 1
Temperature Channel.
10. Ambient Temperature Measured through Remote 2
Temperature Channel.
11. If not using VID5, this pin can be reconfigured as the
+12 V monitoring input.
12. Bidirectional THERM Pin. Allows Intel® Pentium 4®
PROCHOT monitoring and can function as an overtemperature THERM output.
13. SMBALERT System Interrupt Output.
INTRODUCTION
This document is intended as a supplement to the
ADT7463 data sheet. Since many of the pins on the
ADT7463 are multifunctional, there are many possible
configurations of the ADT7463. The purpose of this document is to describe all the possible options and their
configuration register settings.
RECOMMENDED IMPLEMENTATION
Configuring the ADT7463 as in Figure 2 provides the systems designer with the following features:
1. Six VID Inputs (VID0 to VID5) for VRM10 Support.
2. Two PWM Outputs for Fan Control of up to
Three Fans (the front and rear chassis fans are connected in parallel).
3. Three TACH Fan Speed Measurement Inputs.
TACH2
PWM1
FRONT
CHASSIS
FAN
TACH1
ADT7463
PWM3
REAR
CHASSIS
FAN
5(VRM9)/6(VRM10)
TACH3
VID[0:4]/VID[0:5]
D2+
D2–
THERM
D1+
AMBIENT
TEMPERATURE
PROCHOT
D1–
3.3VSB
5V
12V/VID5
ADP316x
VRM
CONTROLLER
VCOMP
SDA
SCL
CURRENT
VCORE
SMBALERT
GND
Figure 1. Recommended Implementation
©2008 SCILLC. All rights reserved.
April 2008 - Rev. 1
REV. 0
Publication Order Number:
AN612/D
AN-612
CONFIGURATION OPTION 1
Configuring the ADT7463 as in Figure 2 provides the systems designer with the following features:
1. Six VID Inputs (VID0 to VID5) for VRM10 Support.
Enabling VID5 also enables the VID code change
detect feature.
2. Three PWM Outputs for Fan Control of up to Four
Fans (PWM1 to PWM3).
3. Four TACH Fan Speed Measurement Inputs.
4. VCC Measured Internally through Pin 4.
5. CPU Core Voltage Measurement (VCCP).
6. SMBALERT Interrupt Output.
7. Bidirectional THERM Pin. Allows P4 PROCHOT
monitoring and can function as an overtemperature
THERM output.
8. Two Remote Diode Temperature Measurements.
PWM1/XTO
SDA 1
24
SCL 2
23
VCCP
GND 3
22
SMBALERT
VCC 4
21
VID5
VID0 5
20
THERM
VID1
6
VID2
7
VID3
ADT7463
19 VID4
TOP VIEW
(Not to Scale) 18 D1+
D1–
8
17
TACH3 9
16
D2+
PWM2 10
15
D2–
TACH1 11
14
TACH4/ADDRESS SELECT
TACH2 12
13
PWM3/ADDRESS ENABLE
Figure 2. Recommended Pinout Option
CONFIGURING THE ADT7463 FOR CONFIGURATION 1
The following bits need to be configured for the recommended pinout:
Register
Bit Setting
Function Selected
VID Register (0x43)
Configuration Register 4 (0x7D)
Configuration Register 3 (0x78)
Configuration Register 4 (0x7D)
<7> VIDSEL = 1
<0> AL2.5V = 1
<1> Therm Timer = 1
<1> TH5V = 1
Configures Pin 21 as the VID5 input
Configures Pin 22 as the SMBALERT output
Enables the THERM monitoring function
Configures Pin 20 as the bidirectional THERM pin
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AN-612
CONFIGURATION OPTION 2
Configuring the ADT7463 as in Figure 3 provides the
systems designer with the following features:
1. Five VID Inputs (VID0 to VID4) for VRM9.x Support.
2. Two PWM Outputs for Fan Control (PWM1 and
PWM3).
3. Three TACH Fan Speed Measurement Inputs.
4. VCC Measured Internally through Pin 4.
5. CPU Core Voltage Measurement (VCCP).
6. 2.5 V Measurement Input.
7. 12 V Measurement Input.
8. 5 V Measurement Input.
9. Two Remote Diode Temperature Measurements.
10. SMBALERT Interrupt Output.
11. Bidirectional THERM Pin. Allows Intel P4 PROCHOT
monitoring and can function as an overtemperature
THERM output.
PWM1/XTO
SDA 1
24
SCL 2
23
VCCP
GND 3
22
2.5V
VCC 4
21
12V
VID0 5
20
5V
ADT7463
VID2
19 VID4
TOP VIEW
7 (Not to Scale) 18 D1+
VID3
VID1
6
D1–
8
17
TACH3 9
16
D2+
SMBALERT 10
15
D2–
TACH1 11
14
ADDRESS SELECT/THERM
TACH2 12
13
PWM3/ADDRESS ENABLE
Figure 3. Pinout Option 2
CONFIGURING THE ADT7463 FOR PINOUT OPTION 2
The following bits need to be configured for Pinout Option 2:
Register
Bit Setting
Function Selected
VID Register (0x43)
Configuration Register 3 (0x78)
Configuration Register 3 (0x78)
Configuration Register 4 (0x7D)
Configuration Register 4 (0x7D)
<7> VIDSEL = 0
<0> ALERT = 1
<1> Therm Timer = 1
<0> AL2.5V = 0
<1> TH5V = 0
Configures Pin 21 as the 12 V input
Configures Pin 10 as SMBALERT output
Enables THERM monitoring on Pin 14
Configures Pin 22 as 2.5 V input
Configures Pin 20 as 5 V input
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AN-612
CONFIGURATION OPTION 3
Configuring the ADT7463 as in Figure 4 provides the systems designer with the following features:
1. Five VID Inputs (VID0 to VID4) for VRM9.x Support.
2. Three PWM Outputs for Fan Control of up to Four
Fans (PWM1 to PWM3).
3. Four TACH Fan Speed Measurement Inputs.
4. VCC Measured Internally through Pin 4.
5. CPU Core Voltage Measurement (VCCP).
6. 2.5 V Measurement Input.
7. 12 V Measurement Input.
8. 5 V Measurement Input.
9. Two Remote Diode Temperature Measurements.
PWM1/XTO
SDA 1
24
SCL 2
23
VCCP
GND 3
22
2.5V
VCC 4
21
12V
VID0 5
20
5V
19
VID4
D1–
VID1
6
VID2
7
VID3
ADT7463
TOP VIEW
(Not to Scale) 18 D1+
8
17
TACH3 9
16
D2+
PWM2 10
15
D2–
TACH1 11
14
TACH4/ADDRESS SELECT
TACH2 12
13
PWM3/ADDRESS ENABLE
Figure 4. Pinout Option 3
CONFIGURING THE ADT7463 FOR PINOUT OPTION 3
The following bits need to be configured for Pinout Option 3:
Register
Bit Setting
Function Selected
VID Register (0x43)
Configuration Register 4 (0x7D)
Configuration Register 4 (0x7D)
<7> VIDSEL = 0
<0> AL2.5V = 0
<1> TH5V = 0
Configures Pin 21 as the 12 V input
Configures Pin 22 as 2.5 V input
Configures Pin 20 as 5 V input
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AN-612
CONFIGURATION OPTION 4
Configuring the ADT7463 as in Figure 5 provides the systems designer with the following features:
SDA
1. Six VID Inputs (VID0 to VID5) for VRM10 Support.
Enabling VID5 also enables the VID code change
detect feature.
2. Three PWM Outputs for Fan Control of up to Four
Fans (PWM1 to PWM3).
3. Four TACH Fan Speed Measurement Inputs.
4. VCC Measured Internally through Pin 4.
5. CPU Core Voltage Measurement (VCCP).
6. 2.5 V Measurement Input.
7. 5 V Measurement Input.
8. Two Remote Diode Temperature Measurements.
PWM1/XTO
1
24
SCL 2
23
VCCP
GND
3
22
2.5V
VCC
4
21
VID5
VID0
5
20
5V
VID1
6
ADT7463
VID2
19 VID4
TOP VIEW
7 (Not to Scale) 18 D1+
VID3
D1–
8
17
TACH3 9
16
D2+
PWM2 10
15
D2–
TACH1 11
14
TACH4/ADDRESS SELECT
TACH2 12
13
PWM3/ADDRESS ENABLE
Figure 5. Pinout Option 4
CONFIGURING THE ADT7463 FOR PINOUT OPTION 4
The following bits need to be configured for Pinout Option 4:
Register
Bit Setting
Function Selected
VID Register (0x43)
Configuration Register 4 (0x7D)
Configuration Register 4 (0x7D)
<7> VIDSEL = 1
<0> AL2.5V = 0
<1> TH5V = 0
Configures Pin 21 as the VID5 input
Configures Pin 22 as 2.5 V input
Configures Pin 20 as 5 V input
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AN-612
CONFIGURATION OPTION 5
Configuring the ADT7463 as in Figure 6 provides the systems designer with the following features:
SDA
1. Five VID Inputs (VID0 to VID4) for VRM9.x Support.
2. Three PWM Outputs for Fan Control of up to Four
Fans (PWM1 to PWM3).
3. Four TACH Fan Speed Measurement Inputs.
4. VCC Measured Internally through Pin 4.
5. CPU Core Voltage Measurement (VCCP).
6. Two Remote Diode Temperature Measurements
7. 12 V Measurement Input.
8. SMBALERT Interrupt Output.
9. Bidirectional THERM Pin. Allows Intel P4 PROCHOT
monitoring and can function as an overtemperature
THERM output.
PWM1/XTO
1
24
SCL 2
23
VCCP
GND
3
22
SMBALERT
VCC
4
21
12V
VID0
5
20
THERM
VID1
6
ADT7463
VID2
19 VID4
TOP VIEW
7 (Not to Scale) 18 D1+
VID3
D1–
8
17
TACH3 9
16
D2+
PWM2 10
15
D2–
TACH1 11
14
TACH4/ADDRESS SELECT
TACH2 12
13
PWM3/ADDRESS ENABLE
Figure 6. Pinout Option 5
CONFIGURING THE ADT7463 FOR PINOUT OPTION 5
The following bits need to be configured for Pinout Option 5:
Register
Bit Setting
Function Selected
VID Register (0x43)
Configuration Register 3 (0x78)
Configuration Register 4 (0x7D)
Configuration Register 3 (0x78)
Configuration Register 4 (0x7D)
<7> VIDSEL = 0
<0> ALERT = 0
<0> AL2.5V = 1
<1> Therm Timer = 1
<1> TH5V = 1
Configures Pin 21 as the 12 V input
Configures Pin 10 as PWM2 output
Configures Pin 22 as SMBALERT output
Enables THERM monitoring
Configures Pin 20 as THERM output
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AN-612
CONFIGURATION OPTION 6
Configuring the ADT7463 as in Figure 7 provides the systems designer with the following features:
SDA
1. Five VID Inputs (VID0 to VID4) for VRM9.x Support.
2. Three PWM Outputs for Fan Control of up to Four
Fans (PWM1 to PWM3).
3. Four TACH Fan Speed Measurement Inputs.
4. VCC Measured Internally through Pin 4.
5. CPU Core Voltage Measurement (VCCP).
6. 2.5 V Measurement Input.
7. 12 V Measurement Input.
8. Bidirectional THERM Pin. Allows P4 PROCHOT
monitoring and can function as an overtemperature
THERM output.
9. Two Remote Diode Temperature Measurements.
PWM1/XTO
1
24
SCL 2
23
VCCP
GND
3
22
2.5V
VCC
4
21
12V
VID0
5
20
THERM
VID1
6
ADT7463
VID2
19 VID4
TOP VIEW
7 (Not to Scale) 18 D1+
VID3
D1–
8
17
TACH3 9
16
D2+
PWM2 10
15
D2–
TACH1 11
14
TACH4/ADDRESS SELECT
TACH2 12
13
PWM3/ADDRESS ENABLE
Figure 7. Pinout Option 6
CONFIGURING THE ADT7463 FOR PINOUT OPTION 6
The following bits need to be configured for Pinout Option 6:
Register
Bit Setting
Function Selected
VID Register (0x43)
Configuration Register 4 (0x7D)
Configuration Register 3 (0x78)
Configuration Register 4 (0x7D)
<7> VIDSEL = 0
<0> AL2.5V = 0
<1> Therm Timer = 1
<1> TH5V = 1
Configures Pin 21 as the 12 V input
Configures Pin 22 as the 2.5 V input
Enables THERM monitoring
Configures Pin 20 as the bidirectional THERM pin
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