Rainbow-electronics LM63 Bedienungsanleitung

LM63±1˚C/±3˚C Accurate Remote Diode Digital TemperatureSensor with Integrated Fan ControlGeneral DescriptionThe LM63 is a remote diode temperature sen

1.0 Functional Description (Continued)1.3 SMBus INTERFACESince the LM63 operates as a slave on the SMBus theSMBCLK line is an input and the SMBDAT lin

1.0 Functional Description (Continued)No-Acknowledge from the Master. Note that the No-Acknowledge is typically used as a signal for the slaveindicati

1.0 Functional Description (Continued)1.10 FAULT QUEUEThe LM63 incorporates a Fault Queue to suppress errone-ous ALERT triggering . The Fault Queue pr

2.0 LM63 RegistersThe following pages include: Section 2.1, a Register Map in Hexadecimal Order, which shows a summary of all registers and theirbit a

2.0 LM63 Registers (Continued)Register0x[HEX]Register NameDATA BITSD7 D6 D5 D4 D3 D2 D1 D04F Lookup Table Hystersis 0 0 0 LOOKH4 LOOKH3 LOOKH2 LOOKH1

2.0 LM63 Registers (Continued)Register[HEX]Register Name Read/WritePOR Default[HEX]ALERT STATUS AND MASK REGISTERS02 ALERT Status Read Only N/A16 ALER

2.0 LM63 Registers (Continued)LM63 Register Descriptions In Functional OrderFan Control RegistersAddressHexRead/WriteBitsPORValueName Description4AHEX

2.0 LM63 Registers (Continued)Fan Control Registers (Continued)AddressHexRead/WriteBitsPORValueName Description4BHEXFAN PWM AND TACHOMETER CONFIGURATI

2.0 LM63 Registers (Continued)Fan Control Registers (Continued)AddressHexRead/WriteBitsPORValueName Description50HEXto 5FHEXLOOKUP TABLE (7 Bits for T

2.0 LM63 Registers (Continued)Configuration RegisterADDRESSHexRead/WriteBitsPORValueName Description03 (09)HEXCONFIGURATION REGISTER03 (09) R/W70ALERT

Pin DescriptionsPin Name Input/Output Function and Connection1VDDPower Supply InputConnect to a low-noise +3.3±0.3 VDC power supply, and bypass to GND

2.0 LM63 Registers (Continued)Tachometer Count And Limit RegistersADDRESSHexRead/WriteBitsPORValueName Description47HEXTACHOMETER COUNT (MSB) and 46HE

2.0 LM63 Registers (Continued)Remote Diode Temperature, Offset And Setpoint RegistersADDRESSHexRead/WriteBitsPORValueName Description01ReadOnly7:0 N/A

2.0 LM63 Registers (Continued)ALERT Status And Mask RegistersADDRESSHexRead/WriteBitsPORValueName Description02HEXALERT STATUS REGISTER (8-bits) (All

2.0 LM63 Registers (Continued)ALERT Status And Mask Registers (Continued)ADDRESSHexRead/WriteBitsPORValueName Description16HEXALERT MASK REGISTER (8-b

3.0 Application Notes3.1 FAN CONTROL DUTY CYCLE VS. REGISTER SETTINGS AND FREQUENCYPWMFreq4D[4:0]StepResolution,%PWMValue4D [5:0]for 100%PWMValue4C [5

3.0 Application Notes (Continued)3.2 USE OF THE LOOKUP TABLE FOR NON-LINEARPWM VALUES VS TEMPERATUREThe Lookup Table, Registers 50 through 5F, can be

3.0 Application Notes (Continued)Pentium 4 processor’s thermal diode. The non-ideality factor,η, is the only other parameter not accounted for and de-

3.0 Application Notes (Continued)3.5 PCB LAYOUT FOR MINIMIZING NOISEIn a noisy environment, such as a processor mother board,layout considerations are

Physical Dimensions inches (millimeters) unless otherwise noted8-Lead (0.154-Inch Wide) Molded Narrow Small-Outline Package (SOIC)JEDEC Registration N

Typical Application20057003Ordering InformationPart Description Top Mark Order Number Transport MediaLM63C (±1˚C) 8-pin SOIC LM63CIMA LM63CIMAX 2500 U

Absolute Maximum Ratings (Notes 1,2)Supply Voltage, VDD−0.3 V to 6.0 VVoltage on SMBDAT, SMBCLK,ALERT/Tach, PWM Pins −0.5 V to 6.0 VVoltage on Other P

AC Electrical CharacteristicsThe following specifications apply for VDD= 3.0 VDC to 3.6 VDC, and all analog source impedance RS=50Ω unless other-wise

SMBus Digital Switching CharacteristicsUnless otherwise noted, these specifications apply for VDD= +3.0 VDC to +3.6 VDC, CL(load capacitance) on outpu

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the devi

1.0 Functional Description (Continued)Standby mode the user may choose to allow the PWMoutput signal to continue, or not, by programming the PWMDisabl

1.0 Functional Description (Continued)cleared only upon a read command from the master (seeFigure 4 ) and will be re-asserted at the end of the nextco