ADT7476A
PIN ASSIGNMENT
Pin No.
Mnemonic
SDA
Description
1
2
3
4
Digital I/O (Open Drain). SMBus bidirectional serial data. Requires SMBus pullup.
Digital Input (Open Drain). SMBus serial clock input. Requires SMBus pullup.
Ground Pin.
SCL
GND
V
CC
Power Supply. Powered by 3.3 V standby, if monitoring in low power states is required. V is also
CC
monitored through this pin.
5
6
7
8
VID0/
GPIO0
VID1/
Digital Input. Voltage supply readouts from CPU. This value is read into the VID/GPIO register (0x43).
General-Purpose Open Drain Digital I/O.
Digital Input. Voltage supply readouts from CPU. This value is read into the VID/GPIO register (0x43).
General-Purpose Open Drain Digital I/O.
GPIO1
VID2/
Digital Input. Voltage supply readouts from CPU. This value is read into the VID/GPIO register (0x43).
General-Purpose Open Drain Digital I/O.
GPIO2
VID3/
GPIO3
Digital Input. Voltage supply readouts from CPU. This value is read into the VID/GPIO register (0x43).
General-Purpose Open Drain Digital I/O.
9
TACH3
Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 3.
10
PWM2/
SMBALERT
Digital Output (Open Drain). Requires 10 kW typical pullup. Pulse width modulated output to control Fan
2 speed. Can be configured as a high or low frequency drive.
Digital Output (Open Drain). This pin can be reconfigured as an SMBALERT interrupt output to signal
out-of-limit conditions.
11
12
13
TACH1
TACH2
Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 1.
Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 2.
PWM3
ADDREN
Digital I/O (Open Drain). Pulse width modulated output to control the speed of Fan 3 and Fan 4.
Requires 10 kW typical pullup. Can be configured as a high or low frequency drive.
If pulled low on powerup, the ADT7476A enters address select mode, and the state of Pin 14 (ADDR
SELECT) determines the ADT7476A’s slave address.
14
TACH4/
Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 4.
THERM/
SMBALERT/
GPIO6/
Alternatively, the pin can be reconfigured as a bidirectional THERM pin. Times and monitors assertions
on the THERM input. For example, it can be connected to the PROCHOT output of Intel’s Pentium 4
processor or to the output of a trip point temperature sensor. Can be used as an output to signal
overtemperature conditions.
ADDR SELECT
Digital Output (Open Drain). This pin can be reconfigured as an SMBALERT interrupt output to signal
out-of-limit conditions.
General-Purpose Open Drain Digital I/O.
If in address select mode, the logic state of this pin defines the SMBus device address.
15
16
17
18
19
D2–
D2+
Cathode Connection to Second Thermal Diode.
Anode Connection to Second Thermal Diode.
D1–
Cathode Connection to First Thermal Diode.
D1+
Anode Connection to First Thermal Diode.
VID4/
GPIO4
Digital Input. Voltage supply readouts from CPU. This value is read into the VID/GPIO register (0x43).
General-Purpose Open Drain Digital I/O.
20
21
+5.0 V
Analog Input. Monitors 5.0 V power supply.
IN
+12 V
/
Analog Input. Monitors 12 V power supply.
Digital Input. Voltage supply readouts from CPU. This value is read into the VID/GPIO register (0x43).
IN
VID5
22
+2.5 V
/
Analog Input. Monitors 2.5 V supply, typically a chipset voltage.
IN
THERM
Alternatively, this pin can be reconfigured as a bidirectional/omnidirectional THERM pin. Can be used to
time and monitor assertions on the THERM input. For example, can be connected to the PROCHOT
output of Intel’s Pentium 4 processor or to the output of a trip point temperature sensor. Can be used as
an output to signal overtemperature conditions.
23
24
V
Analog Input. Monitors processor core voltage (0 V to 3 V).
CCP
PWM1/
XTO
Digital Output (Open Drain). Pulse width modulated output to control the speed of Fan 1. Requires 10 kW
typical pullup.
Also functions as the output from the XOR tree in XOR test mode.
http://onsemi.com
6
5秒后页面跳转
SI2301 N沟道MOSFET：资料手册参数分析
ADC0809逐次逼近寄存器型模数转换器：资料手册参数分析
AD9361捷变收发器：全面参数解析与关键特性概览
IRF3205功率MOSFET：资料手册参数分析
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
技术参数
数据手册
如果您发现信息不准确，
