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PDF W83783G Data sheet ( Hoja de datos )
| Número de pieza | W83783G | |
| Descripción | Monitoring IC | |
| Fabricantes | Winbond | |
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W83783S/W83783G
Winbond H/W
Monitoring IC
1 page  
W83783S
1. GENERAL DESCRIPTION
W83783S is an evolving version of W83782D --- Winbond's most popular hardware status monitoring
IC. The W83783S 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 computer system to work stable and properly. W83783S provides I2CTM serial bus interface.
An 8-bit analog-to-digital converter (ADC) was built inside W83783S. The W83783S can monitor 6
analog voltage inputs, 3 fan tachometer inputs, and 3 remote temperatures. The remote temperature
sensing can be performed by thermistors, or 2N3904 NPN-type transistors, or directly from IntelTM
Deschutes CPU thermal diode output. Also the W83783S provides: 2 PWM (pulse width modulation)
outputs for the fan speed control; beep tone output for warning; SMI#, OVT#, GPO# signals for
system protection events.
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. An optional beep tone could be used as warning signal
when the monitored parameters are out of the preset range.
Additionally, 5 VID inputs are provided to read the VID of CPU (i.e. PentiumTM II) if applicable. This is
to provide the Vcore voltage correction automatically. Also W83783S uniquely provides an optional
feature: early stage (before BIOS was loaded) beep warning. This is to detect if the fatal elements
present --- Vcore or +3.3V voltage fail, and the system can not be boomed up.
Publication Release Date: Oct. 2004
- 3 - Revision 1.1
5 Page 
W83783S
(b) Serial bus write to internal address register only
0
SCL
780
78
SDA
Start By
Master
0
10110
Frame 1
Serial Bus Address Byte
1 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Ack
by
Frame 2
781D Internal Index Register Byte
Ack
by
781D
Stop by
Master
0
Figure 2. Serial Bus Write to Internal Address Register Only
(c) Serial bus read from a register with the internal address register prefer to desired location
SCL
0
780
78
SDA
Start By
Master
0
10110
Frame 1
Serial Bus Address Byte
1 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Ack
by Frame 2
781D Internal Index Register Byte
Ack
by
Master
Stop by
Master
0
Figure 3. Serial Bus Write to Internal Address Register Only
6.2.2 The serial bus timing of the temperature 2 and 3 is shown as follow:
(a) Typical 2-byte read from preset pointer location (Temp, TOS, THYST)
0
SCL
SDA
Start By
Master
0
10110
Frame 1
Serial Bus Address Byte
7 8 0 ...
7 8 0 ...
7
1 R/W
D7 ...
D1 D0
D7 ...
D1 D0
Ack
by
782D
Frame 2
MSB Data Byte
Ack
by
Master
Frame 3
LSB Data Byte
Ack
by
Master
Stop by
Master
Figure 4. Typical 2-Byte Read From Preset Pointer Location
Publication Release Date: Oct. 2004
- 9 - Revision 1.1
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet W83783G.PDF ] | |
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