LM63CIMA National Semiconductor, LM63CIMA Datasheet

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... Offset register can adjust for a variety of thermal diodes Connection Diagram Intel ™ trademark of Intel Corporation. Pentium ™ trademark of Intel Corporation. © 2010 National Semiconductor Corporation LM63 ■ 10 bit plus sign remote diode temperature data format, with 0.125°C resolution ■ ...

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Pin Descriptions Pin Name Input/Output V 1 Power Supply Input Analog Input 3 D− Analog Input Open-Drain 4 PWM Digital Output 5 GND Ground 6 ALERT/TACH Digital I/O Digital Input/ 7 SMBDAT Open-Drain Output 8 SMBCLK Digital ...

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... LM63C (±1°C) 8-pin SOIC LM63D (±3°C) 8-pin SOIC LM63D (±3°C) 8-pin SOIC LM63 Evaluation Board With Software and User’s Guide Top Mark Order Number LM63CIMA LM63CIMAX LM63CIMA LM63CIMA LM63DIMA LM63DIMAX LM63DIMA LM63DIMA N/A LM63EVAL 3 20057003 Transport Media ...

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... Parameter Temperature Error Using the Remote Thermal Diode of an Intel Pentium 4 or Mobile Pentium 4 Processor-M with typical non-ideality of 1.0021. Temperature Error Using the Local Diode T Remote Diode Resolution Local Diode Resolution Conversion Time, All Temperatures D− Source Voltage Diode Source Current ...

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AC Electrical Characteristics The following specifications apply for V specified in the conditions. Boldface limits apply for T Symbol Parameter TACHOMETER ACCURACY Fan Control Accuracy Fan Full-Scale Count Fan Counter Clock Frequency Fan Count Update Frequency FAN PWM OUTPUT Frequency ...

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SMBus Digital Switching Characteristics Unless otherwise noted, these specifications apply for V pF. Boldface limits apply for characteristics of the LM63 fully meet or exceed the published specifications of the SMBus version 2.0. The following parameters ...

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... ESD protection circuitry are shown below for the LM63's pins. The nominal breakdown voltage 6.5 V. Care should be taken not to forward bias the parasitic diode, D1, present on pins D+ and D−. Doing so by more than 50 mV may corrupt temperature measurements. An "X" means it exists in the circuit ...

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... ALERT Status Register, with the exception of Busy or Open, will cause the ALERT output to be pulled low. Any temperature conversion that is out of the limits defined in the temperature setpoint registers will trigger an ALERT. Addi- tionally, the ALERT Mask Bit must be cleared to trigger an ALERT in all modes ...

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... In order for the ALERT to be used as a dedicated interrupt signal, the Com- parator Mode bit in the Remote Diode Temperature Filter and Comparator Mode Register must be set low. This is the pow- er-on default state. The following sequence describes the ...

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... Temperature High Byte (RTHB) register is loaded with −128°C (1000 0000) and the OPEN bit in the ALERT Status Register will not be set. A temperature reading of −128°C in- dicates that D+ is shorted to either ground or D-. If the value in the Remote Low Setpoint High Byte (RLSHB) Register is more than − ...

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... DIGITAL FILTER The LM63 incorporates a user-configured digital filter to sup- press erroneous Remote Temperature readings due to noise. The filter is accessed in the Remote Diode Temperature Filter and Comparator Mode Register. The filter can be set accord- ing to the following table. Level 2 is maximum filtering. ...

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... FIGURE 9. Fault Queue Temperature Response Diagram 1.11 ONE-SHOT REGISTER The One-Shot Register is used to initiate a single conversion and comparison cycle when the device is in standby mode, after which the data returns to standby. This is not a data reg- www.national.com ister. A write operation causes the one-shot conversion. The data written to this address is irrelevant and is not stored ...

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... LT7 LT6 LT5 LT4 RTHB14 RTHB13 RTHB12 LHIGH 0 RHIGH STBY PWMDIS LHS7 LHS6 LHS5 LHS4 Write Only. Write command triggers one temperature conversion cycle. RTLB6 RTLB5 0 RTOLB6 RTOLB5 0 RHSLB6 RHSLB5 0 RLSLB6 RLSLB5 0 1 ALTMSK6 1 ALTMSK4 ALTMSK3 RCS7 RCS6 RCS5 RCS4 RTH7 ...

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... Lookup Table Hysteresis CONFIGURATION REGISTER 03 (09) TACHOMETER COUNT AND LIMIT REGISTERS LOCAL TEMPERATURE AND LOCAL SETPOINT REGISTERS 00 Local Temperature 05 (0B) Local High Setpoint REMOTE DIODE TEMPERATURE AND SETPOINT REGISTERS 01 Remote Temperature MSB 10 Remote Temperature LSB 11 Remote Temperature Offset MSB ...

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Register Register Name [HEX] ALERT STATUS AND MASK REGISTERS AND TEST REGISTERS FF Stepping/Die Rev. ID [RESERVED] REGISTERS—NOT USED 1A–1F 20 22–2F 30–3F 40–45 4E 60–BE C0–FD 2.3 LM63 INITIAL REGISTER SEQUENCE ...

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... These bits are unused and always set the PWM Value (register 4C) and the Lookup Table (50–5F) are read-only. The PWM value (0 to 100%) is determined by the current remote diode temperature PWM and the Lookup Table, and can be read from the PWM value register. ...

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Address Read/ Bit POR Hex Write s Value 4D FAN PWM FREQUENCY REGISTER HEX 7:5 000 4D R/W Frequency 4:0 10111 4C PWM VALUE REGISTER HEX 7:6 00 Read (Write only if 4C reg 4A 5:0 000000 bit 5 = ...

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... Address Read/ Bit POR Hex Write s Value LOOKUP TABLE (7 Bits for Temperature and 6 Bits for PWM for each Temperature/PWM Pair) HEX HEX 7 0 Lookup Table 50 Temperature 6:0 0x7F 7:6 00 Lookup Table 51 PWM Entry 1 5:0 0x3F 7 0 Lookup Table 52 Temperature 6:0 0x7F ...

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Configuration Register Address Read/ POR Bits Hex Write Value 03 (09) CONFIGURATION REGISTER HEX STANDBY PWM Disable STANDBY 03 (09) R/W 4:3 00 ALERT/Tach 2 0 T_CRIT Limit 1 0 RDTS Fault 0 ...

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... Note that the 16-bit tachometer MSB and LSB are reversed from Limit (LSB) the 16 bit temperature readings. [Reserved] Not Used. Name 8-bit integer representing the temperature of the LM63 die. Local HIGH High Setpoint for the internal diode. Setpoint 20 Description Tach_Count_Multiple ...

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... These registers contain the value added to or subtracted from the remote diode’s reading to compensate for the different non-ideality factors of different processors, diodes, etc. The 2’s complement value, in these registers is added to the output of the LM63’s ADC to form the temperature reading contained in Remote registers 01 and 10. ...

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... When this bit the ADC is not converting. Busy When this bit is set the ADC is performing a conversion. This bit does not affect ALERT status. When this bit the internal temperature of the LM63 below the Local Local High Setpoint. High Alarm When this bit the internal temperature of the LM63 is above the Local High Setpoint, and an ALERT is triggered ...

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... Only Revision ID FE MANUFACTURER’S ID REGISTER (8-bits) HEX Read FE 7:0 0x01 Manufacturer’s ID 0x01 = National Semiconductor Only Name Sets the conversion rate of the LM63. 00000000 = 0.0625 Hz 00000001 = 0.125 Hz 00000010 = 0.25 Hz 00000011 = 0.5 Hz 00000100 = 1 Hz Rate 00000101 = 2 Hz 00000110 = 4 Hz ...

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Application Notes 3.1 FAN CONTROL DUTY CYCLE VS. REGISTER SETTINGS AND FREQUENCY PWM PWM Step Freq Value Resolution [5:0] % [4:0] for 100 16 12 ...

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... Intel Pentium Mobile Pentium 4 Processor-M processor. FIGURE 10. Processor Connection to LM63 A discrete diode can also be used to sense the temperature of external objects or ambient air. Remember that a discrete diode’s temperature will be affected, and often dominated by, the temperature of its leads ...

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... Compensating for Diode Non-Ideality In order to compensate for the errors introduced by non-ide- ality, the temperature sensor is calibrated for a particular processor. National Semiconductor temperature sensors are always calibrated to the typical non-ideality of a particular processor type. The LM63 is calibrated for the non-ideality of the 0.13 micron Intel Pentium 4 and Mobile Pentium 4 Processor-M proces- sors ...

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... Leakage current between D+ and GND should be kept to a minimum. One nano-ampere of leakage can cause as much as 1°C of error in the diode temperature reading. Keeping the printed circuit board as clean as possible will minimize leakage current. Noise coupling into the digital lines greater than 400 mVp-p ...

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Physical Dimensions 8-Lead (0.154-Inch Wide) Molded Narrow Small-Outline Package (SOIC) www.national.com inches (millimeters) unless otherwise noted JEDEC Registration Number MS-012 Order Number LM63CIM NS Package Number M008A 28 ...

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Notes 29 www.national.com ...

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