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參數(shù)資料
| 型號(hào)： | ADT7466ARQZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | dBCool Remote Thermal Controller and Voltage Monitor |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | LEAD FREE, MO-137AB, QSOP-16 |
| 文件頁數(shù)： | 24/48頁 |
| 文件大小： | 1269K |
| 代理商： | ADT7466ARQZ |
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ADT7466
Measuring PROCHOT Assertion Time
Rev. 0 | Page 24 of 48
The ADT7466 has an internal timer to measure PROCHOT
assertion time. The timer is started on the assertion of the
ADT7466 PROCHOT input, and stopped on the negation of
the pin. The timer counts PROCHOT times cumulatively, that
is, the timer resumes counting on the next PROCHOT
assertion. The PROCHOT timer continues to accumulate
PROCHOT assertion times until the timer is read (it is cleared
on read) or until it reaches full scale. If the counter reaches full
scale, it stops at that reading until it is cleared.
The 8-bit PROCHOT timer register (0x0F) is designed such
that Bit 0 is set to 1 on the first PROCHOT assertion. Once the
cumulative PROCHOT assertion time exceeds 50 ms, Bit 1 of
the PROCHOT timer is set, and Bit 0 becomes the LSB of the
timer with a resolution of 22.76 ms.
0
7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 1
PROCHOT
PROCHOT
TIMER
(REG. 0x0F)
PROCHOT ASSERTED < OR = 25ms
PROCHOT
ACCUMULATE PROCHOT LOW
ASSERTION TIMES
7 6 5 4 3 2 1 0
0 0 0 0 0 0 1 0
PROCHOT
TIMER
(REG. 0x0F)
PROCHOT ASSERTED > OR = 50ms
PROCHOT
ACCUMULATE PROCHOT LOW
ASSERTION TIMES
7 6 5 4 3 2 1 0
0 0 0 0 0 1 0 1
PROCHOT
TIMER
(REG. 0x0F)
PROCHOT ASSERTED > OR = 125ms
(100ms + 25ms)
Figure 30. PROCHOT Timer
Figure 30 shows how the PROCHOT timer behaves as the
PROCHOT input is asserted and negated. Bit 0 is set on the first
PROCHOT assertion that is detected. This bit remains set until
the cumulative PROCHOT assertions exceed 50 ms. At this
time, Bit 1 of the PROCHOT timer is set, and Bit 0 is cleared.
Bit 0 now reflects timer readings with a resolution of 25 ms.
When using the PROCHOT timer, be aware of the following.
After a PROCHOT timer read (0x0F):
The contents of the timer are cleared on read.
The PHOT bit (Bit 1) of Status Register 2 is cleared
automatically.
If the PROCHOT timer is read during a PROCHOT assertion,
the following happens:
The contents of the timer are cleared.
Bit 0 of the PROCHOT timer is set to 1 (since a
PROCHOT assertion is occurring).
The PROCHOT timer increments from 0.
If the PROCHOT limit (0x1E) = 0x00, the PHOT bit is set.
Generating ALERT Interrupts from PROCHOT Events
The ADT7466 can generate ALERTs when a programmable
PROCHOT limit is exceeded. This allows the systems designer
to ignore brief, infrequent PROCHOT assertions, while
capturing longer PROCHOT events that could signify a more
serious thermal problem within the system. Register 0x1E is the
PROCHOT limit register. This 8-bit register allows a limit from
0 seconds (first PROCHOT assertion) to 6.4 seconds to be set
before an ALERT is generated. The PROCHOT timer value is
compared with the contents of the PROCHOT limit register. If
the PROCHOT timer value exceeds the PROCHOT limit value,
the PHOT bit (Bit 1) of Status Register 2 is set, and an ALERT is
generated. The PHOT bit (Bit 1) of Mask Register 2 (0x13)
masks ALERTs if this bit is set to 1, although the PHOT bit of
Interrupt Status Register 2 is still set if the PROCHOT limit is
exceeded.
Figure 32 is a functional block diagram of the PROCHOT timer
limit and associated circuitry. Writing a value of 0x00 to the
PROCHOT limit register (0x21) causes ALERT to be generated
on the first PROCHOT assertion. A PROCHOT limit value of
0x01 generates an ALERT when cumulative PROCHOT
assertions exceed 50 ms.
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| ADT7466ARQZ-REEL | 功能描述:板上安裝溫度傳感器 RMT THRM CTR VLT MON 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 |
| ADT7466ARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 16QSOP RoHS:是 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 輸出風(fēng)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 |
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| ADT7467 | 制造商:AD 制造商全稱:Analog Devices 功能描述:dBCool Remote Thermal Monitor and Fan Controller |
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