参数资料
型号: ADT7468ARQ
厂商: ON Semiconductor
文件页数: 24/81页
文件大小: 0K
描述: IC REMOTE THERMAL CTRLR 24-QSOP
产品变化通告: MFG CHG Notification ADI to ON Semi
Product Obsolescence 11/Feb/2009
标准包装: 56
系列: dBCool®
功能: 风扇控制,温度监控器
传感器类型: 内部和外部
感应温度: -40°C ~ 120°C,外部传感器
精确度: ±2°C(最小值)
拓扑: ADC,比较器,风扇速度计数器,多路复用器,寄存器库
输出类型: SMBus?
输出警报:
输出风扇:
电源电压: 3 V ~ 5.5 V
工作温度: -40°C ~ 120°C
安装类型: 表面贴装
封装/外壳: 24-SSOP(0.154",3.90mm 宽)
供应商设备封装: 24-QSOP
包装: 管件
ADT7468
Figure 28 shows how the SMBALERT output and sticky status
bits behave. Once a limit is exceeded, the corresponding status
bit is set to 1. The status bit remains set until the error condition
subsides and the status register is read. This ensures that an out-
of-limit event cannot be missed, if software is polling the device
periodically. Note that the SMBALERT output remains low for
the entire duration that a reading is out-of-limit and until the
status register has been read. This has implications on how
software handles the interrupt.
Handling SMBALERT Interrupts
To prevent the system from b eing   tied up servicing interrupts, it
is recommend to handle the SMBALERT interrupt as follows:
Figure 29. How Masking the Interrupt Source Affects SMBALERT Output
Interrupt Mask Register 1 (Reg. 0x74)
Bit 7 (OOL) = 1, masks SMBALERT for any alert condition
flagged in Status Register 2.
Bit 6 (R2T) = 1, masks SMBALERT for Remote 2 temperature.
Bit 5 (LT) = 1, masks SMBALERT for local temperature.
Bit 4 (R1T) = 1, masks SMBALERT for Remote 1 temperature.
Bit 3 (5 V) = 1, masks SMBALERT for 5 V channel.
Bit 2 (V CC ) = 1, masks SMBALERT for V CC channel.
Bit 0 (V CCP ) = 1, masks SMBALERT for V CCP channel.
Interrupt Mask Register 2 (Reg. 0x75)
1.
2.
3.
4.
5.
6.
7.
Detect the SMBALERT assertion.
Enter the interrupt handler.
Read the status registers to identify the interrupt source.
Mask the interrupt source by setting the appropriate mask
bit in the interrupt mask registers (Reg. 0x74 and
Reg. 0x75).
Take the appropriate action for a given interrupt source.
Exit the interrupt handler.
Periodically poll the status registers. If the interrupt status
bit has cleared, reset the corresponding interrupt mask bit
Bit 7 (D2) = 1, masks SMBALERT for Diode 2 errors.
Bit 6 (D1) = 1, masks SMBALERT for Diode 1 errors.
Bit 5 (FAN4) = 1, masks SMBALERT for Fan 4 failure.
If the T ACH4    pin i s being used as the THERM input, this bit
masks SMBALERT for a THERM event.
Bit 4 (FAN3) = 1, masks SMBALERT for Fan 3.
Bit 3 (FAN2) = 1, masks SMBALERT for Fan 2.
Bit 2 (FAN1) = 1, masks SMBALERT for Fan 1.
Bit 1 (OVT) = 1, masks SMBALERT for overtemperature
(exceeding THERM temperature limits).
Bit 0 (12V/VC) = 1, masks SMBALERT for 12 V channel or for
to 0. This causes the SMBALERT output and status bits to
behave as shown in Figure 29.
Masking Interrupt Sources
Interrupt Mask Registers 1 and 2 are located at Addresses 0x74
and 0x75. These allow individual interrupt sources to be
masked out to prevent SMBALERT interrupts. Note that
a VID code change, depending on the function used.
Enabling the SMBALERT Interrupt Output
The SMBALERT interrupt function is disabled by default.
Pin 10 or Pin 14 can be reconfigured as an SMBALERT output
to signal out-of-limit conditions.
Table 12. Configuring Pin 10 a s SMBALERT Output
masking an interrupt source prevents only the SMBALERT
output from being asserted; the appropriate status bit is set
normally.
Register
Configuration Register 3
(Reg. 0x78)
Bit Setting
<0> Pin 10 = alert
<1> Pin 10 = PWM2
HIGH LIMIT
TEMPERATURE
“STICKY”
CLEARED ON READ
(TEMP BELOW LIMIT)
Assigning THERM Functionality to a Pin
Pin 14 on th e ADT7468 has four possible functions:
SMBALERT, THERM, GPIO, and TACH4. The user chooses
the required functionality by setting Bit 0 and Bit 1 of
Configuration Register 4 at Address 0x7D.
STATUS BIT
TEMP BACK IN LIMIT
(STATUS BIT STAYS SET)
SMBALERT
INTERRUPT
MASK BIT SET
INTERRUPT MASK BIT
CLEARED
(SMBALERT REARMED)
Rev. 3 | Page 24 of 81 | www.onsemi.com
相关PDF资料
PDF描述
VE-J3H-CW CONVERTER MOD DC/DC 52V 100W
ASC05DRES CONN EDGECARD 10POS .100 EYELET
EP1K30FC256-3N IC ACEX 1K FPGA 30K 256-FBGA
VE-J3F-CW CONVERTER MOD DC/DC 72V 100W
EB81-S0K0660W CONN EDGEBOARD DUAL 12POS 5A
相关代理商/技术参数
参数描述
ADT7468ARQ-REEL 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:否 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
ADT7468ARQ-REEL7 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:否 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
ADT7468ARQZ 功能描述:板上安装温度传感器 RMT THRM CTR VLT MON 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
ADT7468ARQZ-REEL 功能描述:板上安装温度传感器 RMT THRM CTR VLT MON 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
ADT7468ARQZ-REEL7 功能描述:IC REMOTE THERMAL CTRLR 24QSOP 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