lm64cilqx-f National Semiconductor Corporation, lm64cilqx-f Datasheet
lm64cilqx-f
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lm64cilqx-f 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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Absolute Maximum Ratings 2) Supply Voltage Voltage on SMBDAT, SMBCLK, ALERT, T_Crit, PWM Pins Voltage on Other Pins −0 Input Current, D− Pin Input Current at All Other Pins (Note 3) Package Input Current (Note ...
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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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Notes Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee performance limits. For guaranteed specifications and test conditions, see the ...
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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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LM64 Registers (Continued) Conversion Rate And One-Shot Registers ADDRESS Read/ POR Bits Hex Write Value 04 (0A) CONVERSION RATE REGISTER (8-bits) HEX 04 (0A) R/W 7:0 0x08 04 (0A) ONE-SHOT REGISTER (8-bits) HEX Write 0F 7:0 N/A Only ID ...
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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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Application Notes (Continued) For example processor manufacturer specifies a variation in η from part to part example, assume that a temperature sensor has an accuracy specification of at room temperature of 25˚C. The resulting accuracy ...
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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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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...