W83L784 查看數據表（PDF） - Winbond

零件编号

产品描述 (功能)

比赛名单

W83L784

Winbond H/W Monitoring IC

Winbond 

W83L784R

Preliminary

1. GENERAL DESCRIPTION

W83L784R is an evolving product of W83782D --- Winbond's most popular hardware status

monitoring IC. Specifically designed for the Notebook system, W83L784R can be used to monitor

several critical hardware parameters of the system, including power supply voltages, fan speeds, and

temperatures, which are very important for a high-end Notebook system to work stably and properly.

An 8-bit analog-to-digital converter (ADC) was built inside W83L784R. The W83L784R can

monitor 4 analog voltage inputs, 2 fan tachometer inputs, one on-chip internal temperature sensor

and 2 remote temperature sensors. The remote temperature sensing can be performed by

thermistors, or 2N3904 NPN-type transistors, or directly from IntelTM Deschutes CPU thermal diode

output. The W83L784R provides 2 PWM (pulse width modulation) outputs for the fan speed control

to support the } Thermal CruiseTM ~ system, which can maintain the CPU or system in the specific

programmable temperature under the hardware control. Another Fan speed control mode is }Speed

Cruise} to Keep the fan operating in the specific r.p.m.. On the other hand, the W83L784R provides

low active outputs such as fan fault and Battery low which could issue the hardware warning signals

when the fan speed or battery voltage drop out of the preset range. Also the W83L784R provides:

power good reset for 3V and 5V; power down mode for power saving; fault pin for necessary H/W

shutdown control; SMI#, OVT#, GPO# signals for system protection events; I2CTM serial bus interface.

Through the application software or BIOS, the users can read all the monitored parameters of

system from time to time. And a pop-up warning can be also activated when the monitored item was

out of the proper/preset range. The application software could be Winbond's Hardware DoctorTM, or

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 to

activate one programmable and maskable interrupts. For the spacing saving consideration of the

Notebook system, W83L784R is in the package of 209mil 20pins-SSOP.

Confidential, For Beta-site Only

-5 -

Publication Release Date: Sep.

1999

Revision 0.54

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