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EMC6D103S Datasheet(PDF) 6 Page - SMSC Corporation

Part # EMC6D103S
Description  Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
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EMC6D103S Datasheet(HTML) 6 Page - SMSC Corporation

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Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Datasheet
Revision 0.2 (06-14-06)
6
SMSC EMC6D103S
DATASHEET
List of Tables
Table 3.1 Pin Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 3.2 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 5.1 SMBus Slave Address Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 5.2 SMBus Write Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 5.3 SMBus Read Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 5.4 Modified SMBus Receive Byte Protocol Response to ARA. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 6.1 AVG[2:0] Bit Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 6.2 Conversion Cycle Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 6.3 ADC Conversion Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 6.4 Low Power Mode Control Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 6.5 Min/Max ADC Conversion Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 6.6 Temperature Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 7.1 PWM Ramp Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 7.2 Minimum RPM Detectable Using 3 Edges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 7.3 Minimum RPM Detectable Using 2 Edges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 8.1 Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 8.2 Registers 20-24h: Voltage Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 8.3 Voltage vs. Register Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 8.4 Registers 25-27h: Temperature Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 8.5 Temperature vs. Register Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 8.6 Registers 28-2Fh: Fan Tachometer Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 8.7 Registers 30-32h: Current PWM Duty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 8.8 PWM Duty vs Register Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 8.9 Register 3Eh: Company ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 8.10 Register 3Fh: Version / Stepping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 8.11 Register 40h: Ready/Lock/Start Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 8.12 Ready/Lock/Start Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 8.13 Register 41h: Interrupt Status Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 8.15 Register 42h: Interrupt Status Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 8.17 Register 43h: VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 8.18 Registers 44-4Dh: Voltage Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 8.20 Registers 4E-53h: Temperature Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 8.21 Temperature Limits vs. Register Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 8.22 Registers 54-5Bh: Fan Tachometer Low Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 8.23 Registers 5C-5Eh: PWM Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 8.24 Fan Zone Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 8.25 Fan Spin-Up Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 8.26 Registers 5F-61h: Zone Temperature Range, PWM Frequency . . . . . . . . . . . . . . . . . . . . . . . 64
Table 8.27 Register Setting vs. PWM Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 8.28 Register Setting vs. Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 8.29 Register 62h, 63h: Min/Off, PWM Ramp Rate Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 8.30 PWM Ramp Rate Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 8.31 Registers 64-66h: Minimum PWM Duty Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 8.32 PWM Duty vs. Register Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 8.33 Registers 67-69h: Zone Low Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 8.34 Temperature Limit vs. Register Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 8.35 Registers 6A-6Ch: Absolute Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 8.36 Absolute Limit vs. Register Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 8.37 Register 6F: XOR Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 8.38 Register 7Ch: Special Function Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 8.40 AVG[2:0] Bit Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 8.41 Register 7Eh: Interrupt Enable 1 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71


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