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Method for monitoring device by SMBus chip on PCI plate and its device

A chip and device technology, applied in the expansion and application fields of serial bus and its devices, can solve the problems of unresolved device monitoring on PCI, no way to know the state, noise, etc., and the method and device are simple, cost-effective The effect of high and broad application prospects

Inactive Publication Date: 2005-03-23
李谦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the prior art has had the above-mentioned various developments, the monitoring of equipment in the computer is limited to the monitoring circuit on the computer motherboard, and the monitoring of devices on the PCI is not solved, such as important chip operating voltage monitoring on the PCI board, PCI board Monitor the cooling fan of the high-heating chip. There is no speed adjustment of the fans on the PCI board, and there is no way to know their status. The temperature of the device on the PCI has nothing to do with the fan speed. The fan speed cannot be automatically adjusted according to the temperature. there is some noise

Method used

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  • Method for monitoring device by SMBus chip on PCI plate and its device
  • Method for monitoring device by SMBus chip on PCI plate and its device
  • Method for monitoring device by SMBus chip on PCI plate and its device

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Such as image 3 , In this example, the computer uses an Intel desktop motherboard, the model is D865PESO, and the motherboard has 3 PCI slots. There is an SMBus bus expansion interface on the No. 2 PCI slot of the motherboard, from which SMBCLK and SMBDAT are connected to the PCI equipment monitoring device , that is to connect the 7 pins and 8 pins of LM63. The LM63 chip is used as the monitoring chip in the circuit. Here LM63 is a slave device on the SMBus bus. The device address of LM63 is 1001 100. The main functions of LM63 are as follows:

[0050] Use 2N3904 transistor or PN junction temperature measurement, D+, D- terminal input

[0051] Automatic correction of self-heating effects

[0052] ·Support P4 or P4-m processor's built-in diode temperature measurement method

[0053] Integrated PWM fan speed control function, PWM terminal output

[0054] · Programmable 8-level variable speed adjustment to reduce noise

[0055] ·With fan speed counting, TACH terminal...

Embodiment 2

[0065] Invented circuit principles such as Figure 4 In this example, the computer uses an Intel desktop motherboard, the model is D865PERL, and the motherboard has 5 PCI slots. There is an SMBus bus expansion interface on the No. 2 PCI slot of the motherboard. From pins 40 and 41 of the A side of the PCI slot, That is, lead SMBDATA and SMBCLK to the computer PCI board device monitoring circuit on the SMBus bus, connect the SMBus bus of the chip to the SCL and SDA of the circuit W83L785. The W83L785 used in the PCI device monitoring circuit is often used in the hardware monitoring circuit of the notebook computer. The device address of the W83L785 is 0101101. It can monitor parameters including: voltage, temperature, fan speed, etc. It has a built-in 8-bit ADC and provides 2 sets of PWM output control. Fan speed, providing SMI#, OUT# signal and GPIO, with I2C / compatible SMBus bus interface, through the application software and BIOS, the user can monitor all parameters at any t...

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PUM

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Abstract

The invention discloses an approach and equipment of using SMBus chip monitor device. It relates to bus extension and chip application. The invention is to extend SMBus node. Using SMBus chip on PCI board; device parameters such as pressure, rotate speed and temperature are measured. Temperature signal is served as feedback to input chip and computed and controlled inside chip. Through amplification driver circuit, fan rotate speed is controlled to form closed loop. The equipment is made up with monitor chip on PCI board, temperature sensor, amplification driver circuit, fan, power supply, rotate speed measure matching circuit, voltage division circuit and SMBus. Merits of the invention are: being able to monitor PCI board, such as monitoring and controlling fan's rotate, reducing noise, protecting environment and being helpful to manager computer device by communicating with computer through SMBus.

Description

technical field [0001] The invention relates to the expansion and application of the serial bus and its devices in computers, in particular to a method and device for monitoring devices with a system management bus (also known as SMBus bus) integrated circuit chip on a PCI board. Background technique [0002] PCI bus The PCI (Peripheral Component Interconnect) bus is a computer local bus independent of the CPU. It adopts a unique intermediate buffer design, which can directly hang high-speed peripheral devices such as display cards, sound cards, network cards, and hard disk controllers on the CPU bus. In fact, many of these boards have cooling fans that spin at a constant speed, and 5 PCI expansion slots are usually allowed on the computer. When Intel released the 486 processor in 1992, it also proposed a 32-bit PCI bus. The earliest proposed PCI bus works at a frequency of 33MHz, and the transmission bandwidth reaches 133MB / s. With the requirement for higher performance, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/30
Inventor 李谦
Owner 李谦
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