LM64EVAL National Semiconductor, LM64EVAL Datasheet
LM64EVAL
Specifications of LM64EVAL
Related parts for LM64EVAL
LM64EVAL Summary of contents
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... SMBus 2.0 compatible interface, supports TIMEOUT n 5 General Purpose Input/Output pins n 5 General Purpose Default input pins n 24-pin LLP package Connection Diagram © 2003 National Semiconductor Corporation Key Specifications n Remote Diode Temperature Accuracy (includes quantization error) Ambient Temp 30˚C to 50˚C ...
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Pin Descriptions Pin Name Input/Output Digital Input/ 1 GPIO1 Open-Drain Output Digital Input/ 2 GPIO2 Open-Drain Output Digital Input/ 3 GPIO3 Open-Drain Output Open-Drain 4 PWM Digital Output 5 V Power Supply Input Analog Input 7 D- ...
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... Ordering Information Part Description LM64 24-pin LLP LM64 24-pin LLP LM64 Evaluation Board With Software and Manual Order Number Top Mark LM64CILQ-F 64CILQF LM64CILQX-F 64CILQF LM64EVAL N/A 3 20065502 Transport Media 1000 Units in Tape and Reel 4500 Units in Tape and Reel Packaged www.national.com ...
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Typical Application www.national.com 4 20065503 ...
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... Power-On-Reset Threshold Voltage Supply Current (Note 9) (Notes 1, ESD Susceptibility (Note 4) Human Body Model Machine Model −0 6.0 V SMT Soldering Information See National Semiconductor Application Note AN-1187, −0 6.0 V "Leadless Leadframe Package" for information on SMT + Assembly using LLP Packages. This is available at ± http://www ...
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AC Electrical Characteristics The following specifications apply for V wise 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 ...
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SMBus Digital Switching Characteristics Unless otherwise noted, these specifications apply for V 80 pF. Boldface limits apply for T A switching characteristics of the LM64 fully meet or exceed the published specifications of the SMBus version 2.0. The following parameters ...
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... Protection Input Structure. Note 5: See the National Semiconductor Application Note AN-1187 for Thermal Resistance Junction-to-Ambient Temperature. Note 6: See the National Semiconductor Application Note AN-1187 for recommendations on SMT assembly using the LLP packages. Note 7: “Typicals” are 25˚C and represent most likely parametric norm. They are to be used as general reference values not for critical design calculations. ...
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Functional Description The LM64 Remote Diode Temperature Sensor with Inte- grated Fan Control incorporates a ∆V BE sensor using a Local or Remote diode and a 10-bit plus sign ∆Σ ADC (Delta-Sigma Analog-to-Digital Converter). The pulse-width modulated (PWM) open-drain ...
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Functional Description FIGURE 4. ALERT Output as Temperature Comparator Response Diagram 1.2.2 ALERT Output as an Interrupt The LM64’s ALERT output can be implemented as a simple interrupt signal when it is used to trigger an interrupt service routine. ...
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Functional Description 2. Master sends a START followed by the Alert Response Address (ARA) with a Read Command. 3. Alerting Device(s) send ACK. 4. Alerting Device(s) send their address. While transmitting their address, alerting devices sense whether their ad- ...
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Functional Description 1.5 TEMPERATURE DATA FORMAT Temperature data can only be read from the Local and Remote Temperature registers. The High, Low and T_CRIT setpoint registers are Read/Write. Actual Remote Diode Temperature,˚C 120 125 126 130 135 140 Output ...
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Functional Description The data byte has the Most Significant Bit (MSB) first. At the end of a read, the LM64 can accept either Acknowledge or No-Acknowledge from the Master. Note that the No- Acknowledge is typically used as a ...
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Functional Description 1.10 FAULT QUEUE The LM64 incorporates a Fault Queue to suppress errone- ous ALERT triggering . The Fault Queue prevents false triggering by requiring three consecutive out-of-limit HIGH, LOW, or T_CRIT temperature readings. See Figure 10. The ...
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LM64 Registers The following pages include: Section 2.1, a Register Map in Hexadecimal Order, which shows a summary of all registers and their bit assignments, Section 2.2, a Register Map in Functional Order, and Section 2.3, a detailed explanation ...
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LM64 Registers (Continued) Register Register Name 0x[HEX] 4D PWM Frequency 4E [Reserved] 4F Lookup Table Hystersis 50–5F Lookup Table 60–BE [Reserved] BF Rmt Diode Temp Filter C0–FD [Reserved] FE Manufacturer’ Stepping/Die Rev. ID 2.2 LM64 REGISTER MAP ...
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LM64 Registers (Continued) Register Register Name [HEX] CONVERSION AND ONE-SHOT REGISTERS 04 (0A) Conversion Rate 0F One-Shot ALERT STATUS AND MASK REGISTERS 02 ALERT Status 16 ALERT Mask ID REGISTERS FE Manufacturer’ Stepping/Die Rev. ID GENERAL PURPOSE ...
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LM64 Registers (Continued) 2.4 LM64 REGISTER DESCRIPTIONS IN FUNCTIONAL ORDER Fan Control Registers Address Read/ POR Bits Hex Write Value 4A PWM AND RPM REGISTER HEX 7 R 1:0 ...
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LM64 Registers (Continued) Fan Control Registers Address Read/ POR Bits Hex Write Value 4D FAN PWM FREQUENCY REGISTER HEX 7:5 000 4D R/W 4:0 10111 4C PWM VALUE REGISTER HEX 7:6 00 Read (Write only if 4C reg 5:0 ...
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LM64 Registers (Continued) Fan Control Registers Address Read/ POR Bits Hex Write Value LOOKUP TABLE (7 Bits for Temperature and 6 Bits for PWM for each Temperature/PWM Pair) HEX HEX 6:0 0x7F 7:6 ...
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LM64 Registers (Continued) Configuration Register ADDRESS Read/ POR Bits Hex Write Value 03 (09) CONFIGURATION REGISTER HEX (09) R 4:1 0000 0 0 Tachometer Count And Limit Registers ADDRESS Read/ POR Bits ...
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LM64 Registers (Continued) Local Temperature And Local High Setpoint Registers ADDRESS Read/ POR Bits Hex Write Value 00 LOCAL TEMPERATURE REGISTER (8-bits) HEX Read 00 7:0 N/A Local Temperature Reading (8-bit) Only 05 (0B) LOCAL HIGH SETPOINT REGISTER (8-bits) ...
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LM64 Registers (Continued) ALERT Status And Mask Registers ADDRESS Read/ POR Bits Hex Write Value 02 ALERT STATUS REGISTER (8-bits) (All Alarms are latched until read, then cleared if alarm condition was removed HEX at the time of the ...
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... These bits are unused and always set to 0. General These 5 bits reflect the GPI register bits [4:0] except for Purpose Power-On-Default when they are the 5 logic states of the Output General Pupose Default (GPD) input pins. 24 Description Description Version of LM64 0x01 = National Semiconductor Description ...
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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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Application Notes 3.2 USE OF THE LOOKUP TABLE FOR NON-LINEAR PWM VALUES VS TEMPERATURE The Lookup Table, Registers 50 through 5F, can be used to create a non-linear PWM vs Temperature curve that could be used to reduce the ...
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... Refer to the processor datasheet for the non-ideality factor. 3.3.2 Compensating for Diode Non-Ideality In order to compensate for the errors introduced by non- ideality, 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 LM64 is calibrated for a MMBT3904 diode-connected transistor ...
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Application Notes 3.5 PCB LAYOUT FOR MINIMIZING NOISE FIGURE 11. Ideal Diode Trace Layout In a noisy environment, such as a processor mother board, layout considerations are very critical. Noise induced on traces running between the remote temperature diode ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...