KR20010046535A - Main board embedding on-board ultra 2 scsi controller - Google Patents

Abstract

PURPOSE: A main board equipped with an on-board SCSI controller is provided to display a full performance of an Ultra 2 SCSI by providing a main board equipped with an on-board LVD(Low Voltage Differential) SCSI controller and a single ended SCSI controller. CONSTITUTION: An on-board LVD SCSI controller(200) includes an Ultra 2 SCSI control unit(220) connected to a host-PCI bridge controller(210) equipped in a main board. The host-bridge controller(210) and the Ultra 2 SCSI control unit(220) are interfaced through a PCI bus. The Ultra 2 SCSI control unit(220) includes a core which provides a PCI protocol for performing an interface through the PCI bus connected to the host-PCI bridge controller(210) and a core which a Ultra 2 SCSI protocol for interfacing with LVD devices.

Description

MAIN BOARD EMBEDDING ON-BOARD ULTRA 2 SCSI CONTROLLER}

The present invention relates to a main board of a computer system, and more particularly to a main board having an on-board SCSI controller.

A small computer system interface (SCSI) is an interface device having a very low dependency of a central processing unit (CPU) on data input / output. In addition, unlike integrated device electronics (IDE) devices, SCSI systems can be used with any peripheral device as long as they have a SCSI interface. In addition, SCSI helps improve the performance of personal computers (PCs). Therefore, in server systems, SCSI interface peripherals are primarily used.

Such SCSI can be classified into various types according to specifications such as command set, SCSI standard, bandwidth, and maximum speed. Ultra 2 SCSI is an emerging class of SCSI products. This is the latest development in the SCSI technology evolution leading to SCSI, Fast SCSI, Wide Fast SCSI, and Ultra SCSI, which is twice as much as previous SCSI. It has the data transmission capability and four times the transmission distance. For example, the maximum transfer speed of Ultra SCSI is 40MB / s, whereas the maximum transfer distance of Ultra 2 SCSI is 80MB / s, and the maximum transfer distance of Ultra SCSI is 3m, while the maximum transfer distance of Ultra 2 SCSI is 12m. This increase is due to the fact that Ultra 2 SCSI has doubled the data transfer rate, and the increased transfer distance is due to the introduction of a low power consumption technology called Low Voltage Differential (LVD). As such, Ultra 2 SCSI uses less power to generate less heat, resulting in less noise and the ability to transfer data over long distances.

In general, SCSI specifications differ from one another, which also affects how peripherals are connected. For example, if a higher and lower specification product is connected to a single host adapter and running at the same time, the SCSI interface will conform to the lower specification. Therefore, in order to achieve the full performance of Ultra 2 SCSI, an LVD SCSI controller must be used separately.

1 is a block diagram illustrating a circuit configuration of a conventional LVD SCSI controller 20. Referring to FIG. 1, a conventional LVD SCSI controller 20 is mounted in a PCI slot provided in the computer system 10. As a result, an interface via a PCI bus is made between the computer system 10 and the LVD SCSI controller 20. The LVD SCSI controller 20 shown in FIG. 1 is a controller developed and used by Adaptec, and is provided in a card form. The LVD SCSI controller 20 includes an Ultra 2 SCSI controller 21, which is interfaced with the LVD devices 23 by the control of the Ultra 2 SCSI controller 21. The LVD SCSI controller 20 includes an Ultra SCSI transceiver 22 connected to the Ultra 2 SCSI controller 21 therein. The Ultra SCSI transceiver 22 converts the LVD signal provided from the Ultra 2 SCSI controller 21 into a single ended SCSI signal and converts it into a single ended SCSI signal such as a CD player, a DVD device, a tape recorder, a scanner, and the like. It performs the function provided to the end devices 24.

However, the LVD SCSI controller developed and used by Adpatec and LSI Logic (Symbios) has to be installed in a PCI slot provided in the motherboard of the computer system 10 and the like. A separate slot for the SCSI controller 20 is needed. In addition, the LVD SCSI controller 20 is very expensive and difficult for users to easily purchase and use. Thus, there is a need for a device that is more convenient and can provide the full performance of Ultra 2 SCSI at a lower cost.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a main board having an on-boarded LVD SCSI controller and a single ended SCSI controller. have.

1 is a block diagram showing a circuit configuration of a conventional LVD chassis controller; And

Figure 2 is a block diagram showing the circuit configuration of the on-board LVD chassis controller according to the present invention.

* Description of the symbols for the main parts of the drawings *

210: Host-PCI Bridge Controller 220: Ultra 2 SCSI Control Unit

230: Ultra SCSI control unit 240: LVD SCSI connector

250: single-ended SCSI connector

According to a feature of the present invention for achieving the object of the present invention as described above, the main board having an on-board chassis controller is connected to the bridge controller and the bridge controller provided on the main board from the bridge controller; A first control unit for converting a signal into an LVD signal, a second control unit connected to the first control unit for converting the LVD signal into a single-ended signal, and connected to the first and second control units; A voltage regulator module for providing an LVD voltage to a second controller, an LVD connector connected to the first controller for providing the LVD signal to a plurality of LVD devices, and a single ended signal connected to the second controller It includes an LVD connector for providing a plurality of single-ended devices.

(Example)

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The mainboard with the novel on-board chassis controller of the present invention includes both onboard Ultra 2 SCSI controller and Ultra SCSI controller for performing LVD interface and single-ended interface, so that the LVD is not required through a separate slot. Interface with the SCSI devices as well as single-ended SCSI devices can be easily performed. As a result, the full performance of Ultra 2 SCSI can be achieved with a simpler hardware configuration and lower cost.

2 is a block diagram illustrating a circuit configuration of the on-board LVD chassis controller 200 according to the present invention. Referring to FIG. 2, the on-board LVD chassis controller 200 includes an Ultra 2 SCSI controller 220 connected to a host-PCI bridge controller 210 provided on the main board. An interface through a PCI bus is formed between the host-PCI bridge controller 210 and the Ultra 2 SCSI controller 220. The Ultra 2 SCSI controller 220 includes a core (not shown) that provides a PCI protocol for performing an interface through a PCI bus connected to the host-PCI bridge controller 210, and an LVD. A core (not shown) is provided to provide an Ultra 2 SCSI protocol for interfacing with devices.

The on-board LVD chassis controller 200 further includes an Ultra SCSI controller 230 for supporting general SCSI functions, that is, a single-ended SCSI function, in addition to the Ultra 2 SCSI controller 220 for supporting the LVD function. . The Ultra 2 SCSI controller 220 and the Ultra SCSI controller 230 are connected to a voltage regulator module (VRM) 260 of 2.85V for supplying a voltage for supporting LVD.

The Ultra 2 SCSI controller 220 and the Ultra SCSI controller 230 are connected to the LVD SCSI connector 240 for connecting the LVD devices and the single-ended SCSI connector 250 for connecting the single-ended devices, respectively. Herein, an interface through a SCSI bus is formed between the controllers 220 and 230 and the connectors 240 and 250.

As shown in FIG. 2, the host-PCI bridge controller 210 performs a PCI bus interface with the Ultra 2 SCSI controller 220 at a 64-bit, 33 MHz speed. This is done according to PCI specification 2.1. The core for PCI interface (not shown) provided in the Ultra 2 SCSI control unit 220 converts the PCI interface signals to the SCSI protocol (ie, Ultra 2 SCSI protocol) provided to the core for the SCSI interface (not shown). To interface with the LVD SCSI connector 240.

At this time, the Ultra SCSI controller 230 receives the LVD signal from the Ultra 2 SCSI controller 220 and converts it into an Ultra SCSI protocol therein and then converts the signal into a single-ended signal. The converted single ended signal is transferred to the single ended SCSI connector 250 to interface with the single ended devices.

As described above, the motherboard with the on-board SCSI controller 200 according to the present invention, the on-boarded Ultra 2 SCSI controller 220 and Ultra SCSI controller 230 for performing the LVD interface and single-ended interface Since it includes all, it is possible to easily interface with LVD SCSI devices as well as single-ended SCSI devices without going through a separate slot. As a result, the full performance of Ultra 2 SCSI can be achieved with a simpler hardware configuration and lower cost.

In the above, the configuration and operation of the circuit according to the present invention are shown in accordance with the above description and drawings, but this is merely described, for example, and various changes and modifications are possible without departing from the spirit of the present invention. .

According to the present invention as described above, by providing a LVD SCSI controller function at a more convenient and lower cost by the main board having an on-boarded LVD SCSI controller and a single-ended SCSI controller, ultra-to-SCSI full performance Can exert.

Claims (3)

A bridge controller provided on the main board; A first control unit connected to the bridge controller for converting a signal from the bridge controller into an LVD signal; A second control unit connected to the first control unit for converting the LVD signal into a single ended signal; A voltage regulator module coupled to the first and second controllers for providing an LVD voltage to the first and second controllers; An LVD connector connected to the first control unit to provide the LVD signal to a plurality of LVD devices; And And an LVD connector connected to the second control unit for providing the single ended signal to a plurality of single ended devices. The method of claim 1, And the first controller is an ultra-to-SCSI controller for providing an LVD interface. The method of claim 1, And the second controller is an ultra-SCSI controller for providing a single-ended interface.