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W83L786NG Datasheet(PDF) 6 Page - Winbond |
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W83L786NG Datasheet(HTML) 6 Page - Winbond |
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6 / 50 page  W83L786NR/ W83L786NG Publication Release Date: March 31, 2006 - 1 - Revision 0.9 1. GENERAL DESCRIPTION W83L786NR/NG is an evolving product of W83L785R -- Winbond's most popular hardware monitoring IC, and intelligent fan controlling IC. Specifically designed for the graphic cards and barebone /mini systems, W83L786NR/NG can be used to monitor several critical hardware parameters of the system, including voltages, fan speeds, and temperatures, which are very important for the system to work stably and properly. W83L786NR/NG can monitor up to 3 analog voltage inputs, 2 fan tachometer inputs, and 2 remote temperature sensors. One of the temperature inputs is connected to CPU/GPU thermal diode sensor, and the other remote temperature sensor could be performed by either thermal diode or thermistor. Power-on fan_set configuration offers the function to choose one of the four duty cycles, 100%, 81%, 62%, 43%, as initial fan speed. 2 sets of PWM (Pulse Width Modulation) / DC (Direct Current) fan output for SMART FAN TM control – “Thermal CruiseTM” mode and “SMART FANTM II “mode. Under “Thermal Cruise TM “mode, temperatures of GPU and the system can be maintained within specific programmable ranges under the hardware control. Under “SMART FAN TM II” mode, the fan could be operated at the lowest possible speed for minimum acoustic noise, and the dynamic intelligent fan management could create the most quiet system environment and stable working performance. An 8- bit analog-to-digital converter (ADC) is built inside W83L786NR/NG. As for warning mechanism, W83L786NR/NG provides four pure hardware event pins for independent warning signals: VOLTAGE_FAULT#, FAN_FAULT#, TEMP_FAULT#, and INT#. All threshold values could be set for system protection without any timing delay. One bit power-on address selection is used to decide the address of the W83L786NR/NG over I 2C serial bus interface. W83L786NR/NG also provides up to 7 optional multifunctional GPIO. W83L786NR/NG is powered by 3.3V. Through the application software or BIOS, the users can read all the monitored parameters of system from time to time. A pop-up warning can also be activated when the monitored item is out of the proper / preset range. The application software could be Winbond's Hardware Doctor TM, IntelTM LDCM (LanDesk Client Management), or other management application software. Also the users can set up the upper and lower limits (alarm thresholds) of these monitored parameters and activate one programmable interrupts. For the spacing saving consideration of the Graphic cards and Notebook system, W83L786NR/NG is 20-pin SSOP package. |
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