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LM94 Datasheet(PDF) 15 Page - National Semiconductor (TI) |
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LM94 Datasheet(HTML) 15 Page - National Semiconductor (TI) |
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15 / 24 page  13.0 Registers (Continued) Lock Register Name Address Description OTHER LIMIT REGISTERS FAN Tach 4 Limit MSB BBh FAN Tach 4 Limit MSB SETUP REGISTERS Special Function Control 1 BCh Controls the hysteresis for voltage limit comparisons. Also selects filtered or unfiltered temperature usage for temperature limit comparisons and fan control. Special Function Control 2 BDh Enables smart tach detection. Also selects 0.5˚C or 1.0˚C resolution for fan control. x GPI / VID Level Control BEh Control the input threshold levels for the P1_VIDx, P2_VIDx and GPIO_x inputs. x PWM Ramp Control BFh Controls the ramp rate of the PWM duty cycle when VRDx_HOT is asserted, as well as the ramp rate when PROCHOT exceeds the user threshold. x Fan Boost Hysteresis (Zones 1/2) C0h Fan Boost Hysteresis for zones 1 and 2 x Fan Boost Hysteresis (Zones 3/4) C1h Fan Boost Hysteresis for zones 3 and 4 x Zones 1/2 Spike Smoothing Control C2h Configures Spike Smoothing for zones 1 and 2 x LUT 1/2 MinPWM and Hysteresis C3h Controls MinPWM and hysteresis setting for LUT 1 and 2 auto-fan control x LUT 3/4 MinPWM and Hysteresis C4h Controls MinPWM and hysteresis setting for LUT 3 and 4 auto-fan control GPO C5h Controls the output state of the GPIO pins PROCHOT Control C6h Controls assertion of P1_PROCHOT or P2_PROCHOT PROCHOT Time Interval C7h Configures the time window over which the PROCHOT inputs are measured x PWM1 Control 1 C8h Controls PWM control source bindings. x PWM1 Control 2 C9h Controls PWM override and output polarity x PWM1 Control 3 CAh Controls PWM spin-up duration and duty cycle x PWM1 Control 4 CBh Frequency control for PWM1. x PWM2 Control 1 CCh Controls PWM control source bindings. x PWM2 Control 2 CDh Controls PWM override and output polarity x PWM2 Control 3 CEh Controls PWM spin-up duration and duty cycle x PWM2 Control 4 CFh Frequency control for PWM2 x LUT 1 Base Temperature D0h Base temperature to which look-up table offset is applied for LUT 1 x LUT 2 Base Temperature D1h Base temperature to which look-up table offset is applied for LUT 2 x LUT 3 Base Temperature D2h Base temperature to which look-up table offset is applied for LUT 3 x LUT 4 Base Temperature D3h Base temperature to which look-up table offset is applied for LUT 4 x Step 2 Temp Offset D4h Step 2 LUT 1/2 and LUT 3/4 Offset Temperatures x Step 3 Temp Offset D5h Step 3 LUT 1/2 and LUT 3/4 Offset Temperatures x Step 4 Temp Offset D6h Step 4 LUT 1/2 and LUT 3/4 Offset Temperatures x Step 5 Temp Offset D7h Step 5 LUT 1/2 and LUT 3/4 Offset Temperatures www.national.com 15 |
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