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AMC6821 Datasheet(PDF) 15 Page - Texas Instruments |
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AMC6821 Datasheet(HTML) 15 Page - Texas Instruments |
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15 / 56 page  www.ti.com Local-High-Temp-Limit LocalTemperature Local-Low-Temp-Limit Remote-High-Temp-Limit RemoteTemperature Remote-Low-Temp-Limit Local-Critical-Temp LocalTemperature Remote-Critical-Temp RemoteTemperature ActiveControlTemperature PSV-Temp L-THERMLimit LocalTemperature R-THERMLimit RemoteTemperature LTOIE RTOIE PSVIE THERM-FAN-EN THERMOVIE THERM-FAN-EN THERMOVIE LTOInterrupt PinLow SMBALERT RTOInterrupt PinLow SMBALERT OVR PinLow SMBALERT PinLow OVR PinLow SMBALERT PinLow PSVInterrupt PinLow SMBALERT Assert PinLow THERM ForceFantoFullSpeed LocalThermInterrupt PinLow SMBALERT Assert PinLow THERM ForceFantoFullSpeed RemoteThermInterrupt PinLow SMBALERT LTH LTL LTO RTH RTL RTO LTCBitinStatusRegister2 RTCBitinStatusRegister2 LPSVBitinStatusRegister2 R-THERMBitinStatusRegister1 L-THERMBitinStatusRegister2 AMC6821 SBAS386C – MAY 2006 – REVISED JULY 2007 4. THERM Limit: This limit is an additional fail-safe threshold. When the local or remote temperature is equal to or above this limit, the corresponding L-THERM or R-THERM bit is set ('1'), and the THERM pin is asserted low, which can be used to throttle the CPU clock. Furthermore, the THERM interrupt is generated on the SMBALERT pin if enabled (THERMOVIE = 1). Reading Status Register 1 clears the R-THERM and L-THERM bits. Once cleared, these bits are not reasserted until the temperature falls 5 °C below the THERM limit, even if the THERM condition persists. If the THERM-FAN-EN bit of Configuration Register 3 is set ('1'), L-THERM = 1 or R-THERM = 1 forces the fan to run at full speed. When THERM-FAN-EN = 0, the status of the L-THERM and R-THERM bits do not affect the fan speed directly. Note that the THERM limit can be lower or higher than other temperature limits. For example, if the THERM limit is lower than the PSV temperature limit, then the CPU clock can be throttled while the cooling fan is off. Figure 14. Temperature Out-of-Range Detection Copyright © 2006–2007, Texas Instruments Incorporated Submit Documentation Feedback 15 Product Folder Link(s): AMC6821 |
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