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EMC6D100 Datasheet(PDF) 5 Page - SMSC Corporation

Part # EMC6D100
Description  ENVIRONMENTAL MONITORING AND CONTROL DEVICE WITH AUTOMATIC FAN CAPABILITY
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

EMC6D100 Datasheet(HTML) 5 Page - SMSC Corporation

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Environmental Monitoring and Control Device
Datasheet
SMSC EMC6D100/EMC6D101
Page 5
Rev. 09-09-04
DATASHEET
7.2
LIMIT AND CONFIGURATION REGISTERS ............................................................................................. 29
7.3
DEVICE SET-UP ...............................................................................................................................30
7.4
PWM FAN SPEED CONTROL............................................................................................................. 30
7.4.1
Manual Fan Control Operating Mode ...................................................................................... 30
7.4.2
Auto Fan Control Operating Mode .......................................................................................... 31
7.4.3
Spin Up .................................................................................................................................... 34
7.4.4
Hottest Option.......................................................................................................................... 35
7.5
FAN SPEED MONITORING.................................................................................................................. 35
7.5.1
Fan Tachometer Inputs ...........................................................................................................35
7.5.2
Detection of a Stalled Fan ....................................................................................................... 36
7.5.3
Fan Interrupt Status Bits.......................................................................................................... 36
7.6
LINKING FAN TACHOMETERS TO PWMS ............................................................................................ 36
7.7
SYSTEM SYNCHRONIZATION.............................................................................................................. 36
CHAPTER 8
REGISTER SET................................................................................................................ 37
8.1
UNDEFINED REGISTERS.................................................................................................................... 40
8.2
REGISTER 10H: SMSC TEST REGISTER ............................................................................................ 40
8.3
REGISTER 1E, 1FH: OFFSET REGISTERS........................................................................................... 40
8.4
REGISTERS 20-24H, 70-72H: VOLTAGE READING .............................................................................. 40
8.5
REGISTERS 25-27H: TEMPERATURE READING ................................................................................... 41
8.6
REGISTERS 28-2FH: FAN TACHOMETER READING.............................................................................. 42
8.7
REGISTERS 30-32H: CURRENT PWM DUTY....................................................................................... 42
8.7.1
Manual Mode........................................................................................................................... 43
8.8
REGISTER 3EH: COMPANY ID ........................................................................................................... 44
8.9
REGISTER 3FH: VERSION / STEPPING................................................................................................ 44
8.10
REGISTER 40H: READY/LOCK/START MONITORING ........................................................................ 44
8.11
REGISTER 41H: INTERRUPT STATUS REGISTER 1............................................................................ 46
8.12
REGISTER 42H: INTERRUPT STATUS REGISTER 2............................................................................ 47
8.13
REGISTER 7DH: INTERRUPT STATUS REGISTER 3 ........................................................................... 48
8.14
REGISTER 43H: VID ...................................................................................................................... 48
8.15
REGISTERS 44-4DH, 73-78H: VOLTAGE LIMIT REGISTERS .............................................................. 49
8.16
REGISTERS 4E-53H: TEMPERATURE LIMIT REGISTERS ................................................................... 50
8.17
REGISTERS 54-5BH: FAN TACHOMETER LOW LIMIT ........................................................................ 51
8.18
REGISTERS 5C-5EH: FAN CONFIGURATION .................................................................................... 51
8.18.1
Bits [7:5] Zone/Mode ............................................................................................................51
8.18.2
Bit [4] PWM Invert ................................................................................................................ 52
8.18.3
Bit [3] Reserved.................................................................................................................... 52
8.18.4
Bits [2:0] Spin Up.................................................................................................................. 52
8.19
REGISTERS 5F-61H: AUTO FAN SPEED RANGE, PWM FREQUENCY ................................................ 53
8.20
REGISTER 62H, 63H: MIN/OFF, SPIKE SMOOTHING......................................................................... 55
8.21
REGISTERS 64-66H: MINIMUM PWM DUTY CYCLE ......................................................................... 56
8.22
REGISTERS 67-69H: TEMPERATURE LIMIT .................................................................................... 57
8.23
REGISTERS 6A-6CH: ABSOLUTE TEMPERATURE LIMIT .................................................................... 57
8.24
REGISTERS 6D-6EH: ZONE HYSTERESIS REGISTERS.................................................................. 58
8.25
REGISTER 6F: XOR TEST REGISTER ............................................................................................. 59
8.26
REGISTER 79H: TEST MODE REGISTER .......................................................................................... 59
8.27
REGISTER 7AH: ERROR DEBUG REGISTER..................................................................................... 60
8.28
REGISTER 7BH: TEST DIGITAL VALUE REGISTER ............................................................................ 61
8.29
REGISTER 7CH: SPECIAL FUNCTION REGISTER .............................................................................. 61
8.30
REGISTER 7EH: INTERRUPT ENABLE REGISTER .............................................................................. 62
8.31
REGISTER 7FH: CONFIGURATION REGISTER................................................................................... 63
8.32
REGISTER 80H: FAN TEMP INTERRUPT ENABLE REGISTER .............................................................. 64
8.33
REGISTER 81H: TACH_PWM REGISTER ....................................................................................... 65
8.34
REGISTER 83H: SYNC PULSE CONFIGURATION REGISTER: ON/OFF ............................................ 66
8.34.1
Bit [4] ON.............................................................................................................................. 66
8.35
REGISTERS 86-88H: SMOOTH TEMPERATURE READING REGISTERS ................................................ 66


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