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PDF W83L785R Data sheet ( Hoja de datos )
| Número de pieza | W83L785R | |
| Descripción | WINBOND H/W MONITORING IC FOR NOTEBOOK | |
| Fabricantes | Winbond | |
| Logotipo |  |
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W83L785R
WINBOND H/W MONITORING IC FOR NOTEBOOK
1. GENERAL DESCRIPTION
W83L785R is a condensed product of W83L785R --- Winbond's most popular hardware monitoring IC
for notebook. Specifically designed for the graphic cards and notebook systems, W83L785R 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.
An 8-bit analog-to-digital converter (ADC) was built inside W83L785R. The W83L785R can monitor 4
analog voltage inputs, 2 fan tachometer inputs, 2 remote temperature sensors. The remote
temperature sensing can be performed by thermistors, or 2N3904 NPN-type transistors, or connected
from IntelTM Deschutes CPU thermal diode output. The W83L785R provides 2 PWM (pulse width
modulation) outputs for the fan speed control. Also the W83L785R provides: SMI#, OVT#, Temp
fault, GPIO signals for system protection events; I2CTM serial bus interface. W83L785R also provides
4 pure GPIO and 7 multifunctional GPIO pins, and powered by 3.3V.
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, W83L785R is in the package of 209mil 20pins-SSOP.
1 page  
W83L785R
Pin Discription, continued
PIN NAME PIN NO.
GPIO13
13
+2.5V/
14
GPIO14
+1.5V/
GPIO15
VCORE/
GPIO16
15
16
VREF
CPUT2 /
PII2
CPUT1 /
PII1
VCC
17
18
19
20
TYPE
I/OD12ts
AIN
I/OD12ts
AIN
I/OD12ts
AIN
I/OD12ts
AOUT
AIN
AIN
POWER
Preliminary
DESCRIPTION
General purpose I/O function. Default Open drain.
0V to 2.048V FSR Analog Inputs. (This pin is connected to the
+2.5V).
General purpose I/O function.
This multi-functional pin is programmable.
0V to 2.048V FSR Analog Inputs. (This pin is connected to the
+1.5V).
General purpose I/O function.
This multi-functional pin is programmable.
0V to 2.048V FSR Analog Inputs. (This pin connected to
VCORE)
General purpose I/O function.
This multi-functional pin is programmable.
Reference Voltage.
Thermistor terminal input.(Default) /
PentiumTM II diode input.
This multi-functional pin is programmable.
Thermistor terminal input.(Default) /
PentiumTM II diode input.
This multi-functional pin is programmable.
+3.3 VCC power supply input.
Publication Release Date: Apr. 2001
- 5 - Revision 0.28web
5 Page 
W83L785R
Preliminary
To
THYST
(Comparator Mode; default)
(Interrupt Mode)
OVT#
OVT#
* **
*Interrupt Reset when Interrupt Status Register is read
Figure 5.
*
6.4.4 Temperature Fault (Temp_fault #)
W83L785R provides a good protection for temperature. Set pin11(TEMP_FAULT#) to
monitor temperature and enable TEMP_FAULT# function. When VTIN1(Pin19) or VTIN(Pin18)
temperature exceeds Temperature fault limit in CR53,or R54 pin11 TEMP_FAULT# will be
asserted(Figure 6).
TEMP_FAULT limit
TEMP_FAULT#
Figure 6. TEMP_FAULT
- 11 -
Publication Release Date: Apr. 2001
Revision 0.28web
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet W83L785R.PDF ] | |
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