ADT7473ZEVB【PDF 23/73 页】BOARD EVALUATION FOR ADT7473

您好，
买卖IC网欢迎您。
请登录
免费注册

Sheet目录1194

19页 20页 21页 22页 [23页]24页 25页 26页 27页

ADT7473

45.52 ms, Bit 1 of the THERM timer is set and Bit 0

becomes the LSB of the timer with a resolution of 22.76 ms

(see Figure 32).

When using the THERM timer, be aware of the following.

After a THERM timer read (0x79):

1. The contents of the timer are cleared on read.

2. The F4P bit (Bit 5) of Interrupt Status Register 2

needs to be cleared (assuming that the THERM

timer limit has been exceeded).

If the THERM timer is read during a THERM assertion,

then the following happens:

1. The contents of the timer are cleared.

2. Bit 0 of the THERM timer is set to 1 (because a

THERM assertion is occurring).

3. The THERM timer increments from 0.

4. If the THERM timer limit (Register 0x7A) = 0x00,

the F4P bit is set.

THERM

THERM timer events. Register 0x7A is the THERM timer

limit register. This 8-bit register allows a limit from 0 sec

(first THERM assertion) to 5.825 sec to be set before an

SMBALERT is generated. The THERM timer value is

compared with the contents of the THERM timer limit

register. If the THERM timer value exceeds the THERM

timer limit value, the F4P bit (Bit 5) of Interrupt Status

Register 2 is set and an SMBALERT is generated. The F4P

bit (Bit 5) of Interrupt Mask Register 2 (0x75) masks out the

SMBALERT if this bit is set to 1; however, the F4P bit of

Interrupt Status Register 2 still is set if the THERM timer

limit is exceeded.

Figure 33 is a functional block diagram of the THERM

timer, limit, and associated circuitry. Writing a value of 0x00

to the THERM timer limit register (0x7A) causes an

SMBALERT to be generated on the first THERM assertion.

A THERM timer limit value of 0x01 generates an

SMBALERT once cumulative THERM assertions exceed

45.52 ms.

Configuring the THERM Behavior

THERM

TIMER

(REG. 0x79)

0 0 0 0 0 0 0 1

7 6 5 4 3 2 1 0

THERM ASSERTED

? 22.76 ms

1. Configure Pin 9 as a THERM timer input. Setting

Bit 1 (THERM timer enable) of Configuration

Register 3 (0x78) enables the THERM timer

monitoring functionality. This is disabled on Pin 9

by default. Setting Bit 0 and Bit 1 (PIN9FUNC) of

THERM

ACCUMULATE THERM LOW

ASSERTION TIMES

Configuration Register 4 (0x7D) enables THERM

timer/output functionality on Pin 9 (Bit 1 of

Configuration Register 3, THERM, must also be

set). Pin 9 can also be used as TACH4. Setting

Bit 5, Bit 6, and Bit 7 of Configuration Register 5

(0x7C) makes THERM bidirectional. This means

THERM

TIMER

(REG. 0x79)

0 0 0 0 0 0 1 0

7 6 5 4 3 2 1 0

THERM ASSERTED

? 45.52 ms

that if the appropriate temperature channel exceeds

the THERM temperature limit, the THERM output

asserts. If the ADT7473 is not pulling THERM low,

but THERM is pulled low by an external device

(such as a CPU overtemperature signal), the

THERM

ACCUMULATE THERM LOW

ASSERTION TIMES

THERM timer also times THERM assertions. If

Bit 5, Bit 6, and Bit 7 of Configuration Register 5

(0x7C) are set to 0, THERM is set as a timer input

only.

2. Select the desired fan behavior for THERM timer

events. Assuming the fans are running, setting

THERM

TIMER

(REG. 0x79)

0 0 0 0 0 1 0 1

7 6 5 4 3 2 1 0

THERM ASSERTED

? 113.8 ms

(91.04 ms + 22.76 ms)

Bit 2 (BOOST) of Configuration Register 3 (0x78)

causes all fans to run at 100% duty cycle whenever

THERM is asserted. This allows fail-safe system

cooling. If this bit is 0, the fans run at their current

settings and are not affected by THERM events. If

Figure 32. Understanding the THERM Timer

Generating SMBALERT Interrupts from THERM Timer

Events

The ADT7473/ADT7473 ? 1 can generate an

SMBALERT when a programmable THERM timer limit is

exceeded. This allows the system designer to ignore brief,

infrequent THERM assertions, while capturing longer

the fans are not already running when THERM is

asserted, the fans do not run at full speed.

3. Select whether THERM timer events should

generate SMBALERT interrupts. Bit 5 (F4P) of

Interrupt Mask Register 2 (0x75), when set, masks

out the SMBALERT when the THERM timer limit

value is exceeded. This b it should be cleared if

SMBALERTis based on THERM events required.

http://onsemi.com

23

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

我的联系方式

*

*

*

相关PDF资料

ADT7475EBZEVB BOARD EVALUATION FOR ADT7475

ADT7476EBZEVB BOARD EVALUATION FOR ADT7476

ADT7490ZEVB BOARD EVALUATION FOR ADT7490

ADZS-21262-1-EZEXT BOARD DAUGHTER FOR ADSP-21262

ADZS-BF-EZEXT-1 BOARD DAUGHTER ADSP-BF533/561KIT

ADZS-BFAV-EZEXT BOARD DAUGHT ADSP-BF533,37,61KIT

ADZS-BFSHUSB-EZEXT BOARD DAUGHTER EZ EXTENDER

ADZS-BRKOUT-EX3 ADZS-BRKOUT-EX3

相关代理商/技术参数

ADT7475 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:dBCOOL Remote Thermal Monitor and Fan Controller

ADT7475_1110 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:dbCOOL Remote Thermal Monitor and Fan Controller

ADT7475ARQZ 功能描述:马达/运动/点火控制器和驱动器 MLTCH TDM FAN CTRLR RoHS:否制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube

ADT7475ARQZ-REEL 功能描述:板上安装温度传感器 MULTICH TDM FAN CTRL RoHS:否制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor

ADT7475ARQZ-REEL7 功能描述:IC REMOTE THERMAL CTRLR 16QSOP RoHS:是类别:集成电路 (IC) >> PMIC - 热管理系列:dBCool® 标准包装:1 系列:- 功能:温度监控系统（传感器）传感器类型:内部和外部感应温度:-40°C ~ 125°C，外部传感器精确度:±2.5°C 本地（最大值），±5°C 远程（最大值）拓扑:ADC，比较器，寄存器库输出类型:2 线 SMBus? 输出警报:无输出风扇:无电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6

ADT7475ARQZ-RL7 功能描述:板上安装温度传感器 MLTCH TDM FAN CTRLR RoHS:否制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor

ADT7475EBZEVB 功能描述:BOARD EVALUATION FOR ADT7475 RoHS:否类别:编程器，开发系统 >> 过时/停产零件编号系列:dBCool® 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB）传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否已供物品:成像器板已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP

ADT7476 制造商:AD 制造商全称:Analog Devices 功能描述:dBCool Remote Thermal Controller and Voltage Monitor