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參數(shù)資料
| 型號： | ADT7460ARQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | dB COOL?? Remote Thermal Controller and Fan Controller |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | 0.025 INCH PITCH, MO-137AB, QSOP-16 |
| 文件頁數(shù)： | 19/48頁 |
| 文件大?。?/td> | 695K |
| 代理商： | ADT7460ARQ |
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REV. 0
ADT7460
–19–
OOL = 1 DENOTES A PARAMETER
MONITORED THROUGH STATUS REG 2
IS OUT-OF-LIMIT
Figure 21. Status Register 1
Status Register 1 (Reg. 0x41)
Bit 7 (OOL) = 1,
denotes a bit in Status Register 2 is set and
Status Register 2 should be read.
Bit 6 (R2T) = 1,
Remote 2 Temp High or Low Limit has been
exceeded.
Bit 5 (LT) = 1,
Local Temp High or Low Limit has been
exceeded.
Bit 4 (R1T) = 1,
Remote 1 Temp High or Low Limit has been
exceeded.
Bit 3 = Unused
Bit 2 (V
CC
) = 1,
V
CC
High or Low Limit has been exceeded.
Bit 1
= Unused
Bit 0 (2.5 V) = 1,
2.5 V High or Low Limit has been exceeded.
F4P = 1, FAN4 OR
THERM
TIMER IS OUT-OF-LIMIT
Figure 22. Status Register 2
Status Register 2 (Reg. 0x42)
Bit 7 (D2) = 1,
indicates an open or short on D2+/D2– inputs.
Bit 6 (D1) = 1,
indicates an open or short on D2+/D2– inputs.
Bit 5 (F4P) = 1,
indicates Fan 4 has dropped below minimum
speed. Alternatively, indicates that
THERM
Timer limit has
been exceeded if the
THERM
Timer function is used.
Bit 4 (FAN3) = 1,
indicates Fan 3 has dropped below minimum
speed.
Bit 3 (FAN2) = 1,
indicates Fan 2 has dropped below minimum
speed.
Bit 2 (FAN1) = 1,
indicates Fan 1 has dropped below minimum
speed.
Bit 1 (OVT) = 1,
indicates that a
THERM
overtemperature
limit has been exceeded.
Bit 0
= Unused
SMBALERT
Interrupt Behavior
The ADT7460 can be polled for status, or an
SMBALERT
inter-
rupt can be generated for out-of-limit conditions. It is important
to note how the
SMBALERT
output and status bits behave
when writing Interrupt Handler software.
“STICKY”
STATUS
BIT
HIGH LIMIT
TEMPERATURE
SMBALERT
CLEARED ON READ
(TEMP BELOW LIMIT)
TEMP BACK IN LIMIT
(STATUS BIT STAYS SET)
Figure 23.
SMBALERT
and Status Bit Behavior
Figure 23 shows how the
SMBALERT
output and “sticky”
status bits behave. Once a limit is exceeded, the corresponding
status bit gets set to 1. The status bit remains set until the error
condition subsides and the Status Register gets read. The status
bits are referred to as “sticky” since they remain set until read
by software. 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 being tied up servicing interrupts, it
is recommend to handle the
SMBALERT
interrupt as follows:
1. Detect the
SMBALERT
assertion.
2. Enter the interrupt handler.
3. Read the Status Registers to identify the interrupt source.
4. Mask the interrupt source by setting the appropriate Mask
bit in the Interrupt Mask Registers (Reg. 0x74, 0x75).
5. Take the appropriate action for a given interrupt source.
6. Exit the Interrupt Handler.
7. Periodically poll the Status Registers. If the interrupt status bit
has cleared, reset the corresponding Interrupt Mask Bit to 0.
This will cause the
SMBALERT
output and status bits to
behave as shown in Figure 24.
“STICKY”
STATUS
BIT
HIGH LIMIT
TEMPERATURE
SMBALERT
CLEARED ON READ
(TEMP BELOW LIMIT)
TEMP BACK IN LIMIT
(STATUS BIT STAYS SET)
INTERRUPT
MASK BIT SET
INTERRUPT MASK BIT
CLEARED
(
SMBALERT
REARMED)
Figure 24. How Masking the Interrupt Source Affects
SMBALERT
Output
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADT7460ARQ-REEL | 功能描述:IC SENSOR TEMP FAN-CTRL 16QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7460ARQ-REEL7 | 功能描述:IC SENSOR TEMP FAN-CTRL 16QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:dBCool® 標準包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADT7460ARQZ | 功能描述:馬達/運動/點火控制器和驅(qū)動器 THERMAL MGMT CNTRLR IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| ADT7460ARQZ-R7 | 制造商:ON Semiconductor 功能描述:Temp Sensor Digital Serial (3-Wire) 16-Pin QSOP T/R |
| ADT7460ARQZ-REEL | 功能描述:板上安裝溫度傳感器 THERMAL MGMT CNTRLR IC RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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