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EMC6D103 Datasheet(PDF) 68 Page - SMSC Corporation |
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EMC6D103 Datasheet(HTML) 68 Page - SMSC Corporation |
68 / 92 page Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features Datasheet Revision 0.3 (03-01-07) 68 SMSC EMC6D103 DATASHEET 8.2.17 Registers 5F-61h: Zone Temperature Range, PWM Frequency These registers become read only when the Lock bit is set. Any further attempts to write to these registers shall have no effect. In Auto Fan Mode, when the temperature for a zone is above the Low Temperature Limit (registers 67-69h) and below the Absolute Temperature Limit (registers 6A-6Ch) the speed of a fan assigned to that zone is determined as follows by the auto fan control logic. When the temperature reaches the temperature value programmed in the Zone x Low Temp Limit register, the PWM output assigned to that zone is at PWMx Minimum Duty Cycle. Between Zone x Low Temp Limit and (Zone x Low Temp Limit + Zone x Range), the PWM duty cycle increases linearly according to the temperature as shown in the figure below. Figure 8.1 Fan Activity Above Fan Temp Limit Table 8.27 Fan Spin-Up Register SPIN[2:0] SPIN UP TIME 000 0 sec 001 100ms 010 250ms (default) 011 400ms 100 700ms 101 1000ms 110 2000ms 111 4000ms Table 8.28 Registers 5F-61h: Zone Temperature Range, PWM Frequency Register Address Read/ Write Register Name Bit 7 (MSb) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSb) Default Value 5Fh R/W Zone 1 Range / Fan 1 Frequency RAN3 RAN2 RAN1 RAN0 FRQ3 FRQ2 FRQ1 FRQ0 C3h 60h R/W Zone 2 Range / Fan 2 Frequency RAN3 RAN2 RAN1 RAN0 FRQ3 FRQ2 FRQ1 FRQ0 C3h 61h R/W Zone 3 Range / Fan 3 Frequency RAN3 RAN2 RAN1 RAN0 FRQ3 FRQ2 FRQ1 FRQ0 C3h Temperature Below Fan Temp Limit: Fan is off or at Fan PWM Minimum depending on bit[7:5] of register 62h and bit 2 of register 7Fh Temperature LIMIT: PWM output at MIN FAN SPEED LIMIT+ RANGE: PWM Output at 100% Duty PWM Duty is linear over this range |
Similar Part No. - EMC6D103_07 |
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Similar Description - EMC6D103_07 |
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