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參數(shù)資料
| 型號(hào)： | ADT7460ARQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號(hào)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(yè)數(shù)： | 20/48頁(yè) |
| 文件大?。?/td> | 695K |
| 代理商： | ADT7460ARQ |
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REV. 0
–20–
ADT7460
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
masking an interrupt source only prevents the
SMBALERT
output from being asserted; the appropriate Status bit will get
set as normal.
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 = Unused
Bit 2 (V
CC
) = 1,
masks
SMBALERT
for V
CC
channel.
Bit 1 = Unused
Bit 0 (2.5 V) = 1,
masks
SMBALERT
for 2.5 V channel.
Interrupt Mask Register 2 (Reg. 0x75)
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
TACH4 pin is 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
limits).
Bit 0 = Unused
Enabling the
SMBALERT
Interrupt Output
The
SMBALERT
interrupt function is disabled by default. Pin 5
or Pin 14 can be reconfigured as an
SMBALERT
output to signal
out-of-limit conditions.
CONFIGURING PIN 5 AS SMBALERT OUTPUT
REGISTER
Config Reg 3 (Reg. 0x78)
BIT SETTING
<0> ALERT = 1
CONFIGURING PIN 14 AS SMBALERT OUTPUT
REGISTER
Config Reg 4 (Reg. 0x7D)
Therm Input
The ADT7460 has an internal timer to measure
THERM
assertion time. For example, the
THERM
input may be connected
to
the
PROCHOT
output of a Pentium 4 CPU and measure
system performance. The
THERM
input may also be connected
to the output of a trip point temperature sensor.
The timer is started on the assertion of the ADT7460’s
THERM
input, and stopped on the negation of the pin. The
timer counts
THERM
times cumulatively, i.e., the timer
resumes counting on the next
THERM
assertion. The
THERM
timer will continue to accumulate
THERM
assertion times until
BIT SETTING
<0> AL2.5V = 1
the timer is read (it is cleared on read) or until it reaches full
scale. If the counter reaches full scale, it will stop at that reading
until cleared.
The 8-bit
THERM
Timer register (Reg. 0x79) is designed such
that Bit 0 will get set to 1 on the first
THERM
assertion. Once
the cumulative
THERM
assertion time has exceeded 45.52 ms,
Bit 1 of the
THERM
timer gets set, and Bit 0 now becomes the
LSB of the timer with a resolution of 22.76 ms.
THERM
TIMER
(REG. 0x79)
THERM
0 0 0 0 0 0 1 0
7 6 5 4 3 2 1 0
THERM
ASSERTED
22.76ms
THERM
ACCUMULATE
THERM
LOW
ASSERTION TIMES
THERM
ASSERTED
45.52ms
0 0 0 0 0 1 0 1
7 6 5 4 3 2 1 0
THERM
ASSERTED
113.8ms
(91.04ms + 22.76ms)
THERM
TIMER
(REG. 0x79)
THERM
TIMER
(REG. 0x79)
THERM
ACCUMULATE
THERM
LOW
ASSERTION TIMES
0 0 0 0 0 0 0 1
7 6 5 4 3 2 1 0
Figure 25. Understanding the
THERM
Timer
Figure 25 illustrates how the
THERM
timer behaves as the
THERM
input is asserted and negated. Bit 0 gets set on the
first
THERM
assertion detected. This bit remains set until
such time as the cumulative
THERM
assertions exceed
45.52 ms. At this time, Bit 1 of the
THERM
timer gets set,
and Bit 0 is cleared. Bit 0 now reflects timer readings with a
resolution of 22.76 ms.
When using the
THERM
timer, be aware of the following:
After a
THERM
timer read (Reg. 0x79):
a) The contents of the timer get cleared on read.
b) The F4P bit (Bit 5) of Status Register 2 needs to be cleared
(assuming the
THERM
limit has been exceeded).
If the
THERM
timer is read during a
THERM
assertion, then
the following will happen:
a) The contents of the timer are cleared.
b) Bit 0 of the
THERM
timer is set to 1 (since a
THERM
assertion is occurring).
c) The
THERM
timer increments from zero.
d) If the
THERM
limit (Reg. 0x7A) = 0x00, then the F4P bit
gets set.
Generating
SMBALERT
Interrupts from
THERM
Events
The ADT7460 can generate
SMBALERT
s when a program-
mable
THERM
limit has been exceeded. This allows the
systems designer to ignore brief, infrequent
THERM
assertions,
while capturing longer
THERM
events. Register 0x7A is the
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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(biāo)準(zhǔn)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(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫(kù) 輸出類型:2 線 SMBus? 輸出警報(bào):無(wú) 輸出風(fēng)扇:無(wú) 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(biāo)準(zhǔn)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(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫(kù) 輸出類型:2 線 SMBus? 輸出警報(bào):無(wú) 輸出風(fēng)扇:無(wú) 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(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)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(fēng)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(zhǔn)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(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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