W83L784 데이터 시트보기 (PDF) - Winbond

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W83L784

Winbond H/W Monitoring IC

Winbond 

W83L784R

Preliminary

2. FEATURES

2.1 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

2.2 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

2.3 Power Good

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

2.4 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

2.5 Package

• 20-pin SSOP (209mil)

Confidential, For Beta-site Only

-6 -

Publication Release Date: Sep.

1999

Revision 0.54

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