AMC6821-Q1 Datasheet, PDF (47/54 Pages) Texas Instruments – INTELLIGENT TEMPERATURE MONITOR AND PWM FAN CONTROLLER

AMC6821-Q1
www.ti.com ...................................................................................................................................................................................................... SBAS475 – JUNE 2009
Remote-Low-Temp-Limit Register (Address 0x19, Value After Power-On or Reset = 0x00, 0°C)
Bit 7 (MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0 (LSB)
RT-L10 (MSB)
RT-L9
RT-L8
RT-L7
RT-L6
RT-L5
RT-L4
RT-L3
These bits are the lower bounds of the remote temperature.
Remote-THERM-Limit Register (Address 0x1A, Value After Power-On or Reset = 0x64, +100°C)
Bit 7 (MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0 (LSB)
RT-T10 (MSB)
RT-T9
RT-T8
RT-T7
RT-T6
RT-T5
RT-T4
RT-T3
These bits are the thermal threshold of the remote temperature.
Local-Critical-Temp Register (Address 0x1B, Value After Power-On or Reset = 0x50, +80°C)
Bit 7 (MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0 (LSB)
LT-C10
LT-C9
LT-C8
LT-C7
LT-C6
LT-C5
LT-C4
LT-C3
These bits are the critical threshold of the local temperature.
Bit 7 (MSB)
0
PSV-Temp Register (Address 0x1C, Value After Power-On or Reset = 0x00, 0°C)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
0
PSV8
PSV7
PSV6
PSV5
PSV4
Bit 0 (LSB)
PSV3
Bits [PSV10:PSV0] are the passive cooling temperature threshold. Bits PSV10, PSV9, and [PSV2:PSV0] are
always '0'. The PSV ranges from 0°C to +64°C.
In the auto fan temperature loop, the fan stops and the duty cycle is forced to 0% when the active temperature is
equal to or below the PSV temperature.
Remote-Critical-Temp Register (Address 0x1D, Value After Power-On or Reset = 0x69, +105°C)
Bit 7 (MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0 (LSB)
RT-C10
RT-C9
RT-C8
RT-C7
RT-C6
RT-C5
RT-C4
RT-C3
Bits [RT-C10:RT-C0] are the critical threshold of the remote temperature.
Copyright © 2009, Texas Instruments Incorporated
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