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參數資料
| 型號： | W83791D |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 模擬信號調理 |
| 英文描述： | W83791D Winbond H/W Monitoring IC |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PQFP48 |
| 封裝： | LQFP-48 |
| 文件頁數： | 8/46頁 |
| 文件大小： | 636K |
| 代理商： | W83791D |
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W83791D
Preliminary
Publication Release Date: Aug, 2001
Revision 0.41
1
1. GENERAL DESCRIPTION
W83791D is an evolving version of the W83782D --- Winbond's most popular hardware status monitoring
IC. Besides the conventional functions of W83782D, W83791D uniquely provides several innovative features such
as speech function, ASF sensor compliant, SMBus 2.0 ARP command compatible, VID table selection trapping, and
5VID output control. Conventionally, W83791D 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 stably and efficiently. As for data access, W83791D provides slave SMBus 2.0 interface
which can reply PEC (Packet Error Code) when as ASF sensor.
An 8-bit analog-to-digital converter (ADC) was built inside W83791D. W83791D can simultaneously
monitor 10 analog voltage inputs (including power VDD/5VSB monitoring), 5 fan tachometer inputs, 3 remote
temperatures, and one case open detection signal. The sense of remote temperature can be performed by thermistors,
2N3904 NPN-type transistors, or directly from Intel
TM
CPU with thermal diode output. W83791D provides 3 PWM
(pulse width modulation) outputs for two modes of smart fan control-
}
Thermal Cruise
TM
~
mode and
}
Speed
Cruise
}
mode. Under
}
Thermal Cruise
TM
~
mode, temperatures of CPU and the system can be maintained within
specific programmable ranges under the hardware control.
}
Speed Cruise
}
, namely, is to keep the fan operate in the
specific programmable r.p.m . As for warning mechanism, W83791D provides speech voice warning, beep tone
warning, and SMI#, OVT#, IRQ signals for system protection events.
Additionally, 5 VID inputs are provided to read the VID of CPU (i.e. Pentium
TM
II/III) if applicable. These
VID inputs provide the information of Vcore voltage that CPU expects. Furthermore, W83791D provides
programmable VID output control to alter the voltage CPU consumes. W83791D also uniquely provides an optional
feature: early stage (before BIOS was loaded) beep / speech warning to detect if the fatal elements present --- Vcore
or +3.3V voltage fail and thus the system can not be boomed up. If the VSB power on setting refers to Intel VRM
9.x, the VID table within W83791D will be according to the new one. W83791D also has 2 specific pins to provide
selectable address setting for application of multiple devices (up to 4 devices) wired through I
2
C
TM
interface.
W83791D speech function is enabled by building in a programmable speech synthesizer with a 9-bit current
DAC output as well as a connectable external flash memory for storing voice data. W83791D supports 1 CPU
present or absent event trap, 5 external event traps, 17 hardware monitor event traps (10 analog voltage, 3 fan
tachometer, 3 remote temperature, 1 case open) and 128 internal programmable event traps, amounting to 151
different speech outputs. If more than two events happen simultaneously, the priority set is: SLOTOCC# >
EVNTRP1 > EVNTRP2 > EVNTRP3 > EVNTRP4 > EVNTRP5 > 128 Programmable events (Bank0 index 09h) >
17 Hardware status events. Voice data stored in the external flash memory interface with Winbond W55FXX is
flexible to change by Winbond application software and
on-line
programming flash data is provided also. Besides,
An external resistor is added to provide ring oscillator.
When you do not use the speech function, W83791D provides a set of flexible I/O control functions to the system
designer through a set of General Purpose I/O ports. These GPIO ports may serve as simple I/O or may be
individually configured to provide a pre-defined alternate function. If pin 9 (SPEECH_SEL) is trapped to high at
VSB power on, this function will be active.
W83791D can uniquely serve as an ASF sensor to respond to ASF master’s request for the implementation of
network management in OS-absent state. Through W83791D’s compliance with ASF sensor spec , network server is
able to monitor the environmental status of the client in OS-absent state by PET frame values returned from
W83791D, such as temperatures, voltages, fan speed, and case open. Moreover, W83791D supports SMBus 2.0
ARP command to solve the problem of address conflicts by dynamically assigning a new unique address to
W83791D after W83791D’s UDID is sent.
Through the application software or BIOS, the users can read all the monitored parameters of the system
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W83791G | 功能描述:IC MONITOR H/W 48-LQFP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:1 系列:- 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓撲:ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應商設備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| W83791SD | 制造商:WINBOND 制造商全稱:Winbond 功能描述:H/W MONITORING IC |
| W83791SG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:H/W MONITORING IC |
| W83792AD | 制造商:WINBOND 制造商全稱:Winbond 功能描述:H/W Monitoring IC (CSB Version) |
| W83792AG | 功能描述:IC MONITOR H/W 48-LQFP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標準包裝:2,500 系列:SilentSense™ 功能:溫度監控系統（傳感器） 傳感器類型:內部和外部 感應溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠程（最大） 拓撲:ADC（三角積分型），比較器，寄存器庫 輸出類型:I²C?/SMBus? 輸出警報:是 輸出風扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND |
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