GENERAL DESCRIPTION

W83L784R/G is an evolving product of W83782D/G --- Winbonds most popular hardware status monitoring IC. Specifically designed for the Notebook system, W83L784R/G 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.

FEATURES

Monitoring Items

• 2 thermal inputs from remote thermistors or 2N3904 NPN-type transistors or PentiumTM II (Deschutes) thermal diode output

• One on-chip temperature detection

• 4 voltage inputs

--- typical for Vcore, +3.3V, +5V, Battery

• 2 sets of fan speed control and fan speed monitoring input

• WATCHDOG comparison of all monitored values

• Programmable hysteresis and setting points (alarm thresholds) for all monitored items

Actions Enabling

• Issue fan fault signal as fans are abnomally stopped

• Issue battery low signal as bettery voltage is abnomally out of range

• 2 PWM (pulse width modulation) outputs for fan speed control to support Thermal CruiseTM or Speed CruiseTM

--- Automatically maintain the CPU or system in the specific temperature or keep the fans in the specific speed under the H/W control

• Issue SMI#, OVT#, GPO to activate system protection

• PWR_DN# setting for the Power down mode

• Warning signal pop-up in application software

Power Good

• Issue RESET# outputs as the Power Good signal when 3V and 5V rise across a reset threshold.

General

• I2CTM serial bus interface

• IntelTM LDCM (DMI driver 2.0) support

• AcerTM ADM (DMI driver 2.0) support

• Winbond hardware monitoring application software (Hardware DoctorTM ) support, for both Windows 95/98

• Meet WfM 2.0 (Wired for Management) spec.

• 5V Vcc operation

Package

• 20-pin SSOP (209mil)