CN104978457A

CN104978457A - Domestic FT1500A chip based DDR3 interface board-grade power supply design method

Info

Publication number: CN104978457A
Application number: CN201510367956.XA
Authority: CN
Inventors: 王振; 刘泽; 翟西斌
Original assignee: Inspur Group Co Ltd
Current assignee: Inspur Group Co Ltd
Priority date: 2015-06-29
Filing date: 2015-06-29
Publication date: 2015-10-14

Abstract

The invention particularly relates to a domestic FT1500A chip based DDR3 interface board-grade power supply design method. In the domestic FT1500A chip based DDR3 interface board-grade power supply design method, a power supply module PMU, a DDR3 interface and other domestic FT-1500A chip series processor interfaces are used; a power supply circuit is separately led out of the power supply module PMU and separately supplied to the DDR3 interface; and the power supply circuit of the DDR3 interface is independent of a power supply circuit for the other domestic FT-1500A chip series processor interfaces. According to the domestic FT1500A chip based DDR3 interface board-grade power supply design method, the parasitic inductance can be reduced by about 19.07%, and the parasitic inductance from the power supply module PMU to a power supply path of the DDR3 interface is effectively reduced, so that the power voltage drop of the DDR3 interface is improved, the voltage of the DDR3 interface is ensured to reach a rated value, and further the working performance of the DDR3 interface is ensured.

Description

A kind of DDR3 interface board level power supply power-supply service method based on domestic FT1500A chip

Technical field

The present invention relates to motherboard power supply power-supply service technical field, particularly a kind of DDR3 interface board level power supply power-supply service method based on domestic FT1500A chip.

Background technology

Along with the raising of domestic IC design level, emerge as Godson, soared and a collection of high-quality homemade chip such as Shen Wei.Domestic FT-1500A chip series processor is 64 universal cpus, compatible ARM V8 instruction set, adopts international advanced 28nm technique flow, has the feature such as high-performance, low-power consumption.After tested, domestic FT-1500A chip series processor is suitable with the Intel processor performance of 2010, partial properties is advantage slightly, substituting Intel middle and high end " to strong " server chips can be realized, and be widely used among the every profession and trade information systems such as government and finance, the tax.

At present, domestic FT-1500A chip series comprises 4 cores and 16 core two products.Wherein 4 core processor chips are mainly towards desktop terminal and lightweight service device application, are applicable to build the products such as terminal console, all-in-one, Portable notebook, microserver; The service-oriented device application of 16 core processor chip, supports virtualization, is applicable to build the products such as network front end access server, transaction server, mail server, database server, storage server.The support of this series processors to image, video surpasss the expectation, and numerous user claims it to be the chip of a " be suitable for, available, handy " in the industry.

What processor needed to be connected with mainboard by certain interface just can carry out work.Processor is through development so for many years, and the interface mode of employing has pinned, cassette, contact, stitch etc.And the interface of processor is all stitch interface at present, corresponds on mainboard and just have corresponding slot-type.Processor interface type is different, all changes, so can not patch mutually in jack number, volume, shape.

DDR3, namely third generation double data rate Synchronous Dynamic Random Access Memory (Double-Data-Rate Three Synchronous Dynamic Random Access Memory, is commonly referred to as DDR3 SDRAM), is a kind of computer memory specification.It belongs to the memory product of SDRAM family, provide compared to the higher runnability of DDR2 SDRAM and lower voltage, that DDR2 SDRAM(quadruple is according to rate Synchronous Dynamic Random Access Memory) succession's (being increased to octuple), be also memory product popular now.

As everyone knows, the use of DDR3 interface is extensively in consumption electronic product, server, security device etc.Present main flow ddr interface has arrived DDR3, and speed can reach 1600Mbps especially, the signal risk how changing down increases day by day, shortens the design cycle, is that Hardware Engineer has to problems faced.

When carrying out Power Management Design, for the consideration reduced costs, generally, voltage identical for numerical value can be carried out merging treatment.

And along with signal rate more and more faster, the stray inductance value the Power supply path from PMU chip to IC can cause initial voltage to fall, and receiving end IC voltage cannot reach ratings, thus affects DDR3 interface capability and duty.How reducing the stray inductance value on DDR3 supply path, is one of important measures improving DDR3 performance.

Traditional DDR3 interface board level power supply power-supply service method, as shown in Figure 1.Power for PCIE interface and ddr interface, power supply directly can be powered to DDR3 interface and PCIE interface from supply module PMU, and DDR3 interface is identical with PCIE interface supply voltage numerical value, has thus carried out merging treatment.

Accompanying drawing 3 is the stray inductance values on legacy ddr 3 interface board level power supply power-supply service method plate level path.As seen from the figure, power to DDR3 interface and PCIE interface together, DDR3 interface power supply path stray inductance value is about 215pH.

In order to solve legacy ddr 3 interface board level power supply power-supply service method, the problem that the stray inductance value on DDR3 interface supply path is high, the present invention proposes a kind of high DDR3 interface board level power supply power-supply service method based on domestic FT1500A chip of intelligence degree.Specializing in by carrying out special despatch to DDR3 interface, reducing the stray inductance value on supply path, reaching the object improved DDR3 interface supply voltage and fall.

Summary of the invention

The present invention, in order to make up the defect of prior art, provides a kind of simple, the effectively practical DDR3 interface board level power supply power-supply service method based on domestic FT1500A chip.

The present invention is achieved through the following technical solutions:

A kind of DDR3 interface board level power supply power-supply service method based on domestic FT1500A chip, it is characterized in that: comprise supply module PMU, DDR3 interface and domestic other interfaces of FT-1500A chip series processor, road feed circuit are drawn separately from described supply module PMU, the described DDR3 interface of independent supply, DDR3 interface feed circuit are independent of the feed circuit of described domestic other interfaces of FT-1500A chip series processor, the initial voltage caused from the stray inductance value the Power supply path of supply module PMU to DDR3 interface is avoided to fall, ensure that DDR3 interface voltage reaches ratings.

Described domestic other interfaces of FT-1500A chip series processor refer to the interface that supply voltage numerical value is identical with DDR3 interface supply voltage numerical value, can be PCIE interface or AGP interface.

Described DDR3 interface voltage ratings is 1.5V.

The invention has the beneficial effects as follows: should based on the DDR3 interface board level power supply power-supply service method of domestic FT1500A chip, stray inductance value can be made to reduce about 19.07%, effectively reduce from the stray inductance value the Power supply path of supply module PMU to DDR3 interface, thus improve DDR3 interface power Voltage Drop, ensure that DDR3 interface voltage reaches ratings, and then ensure that the serviceability of DDR3 interface.

Accompanying drawing explanation

Accompanying drawing 1 is traditional DDR3 interface board level power supply power-supply service method schematic diagram;

Accompanying drawing 2 is for the present invention is based on the DDR3 interface board level power supply power-supply service method schematic diagram of domestic FT1500A chip;

Accompanying drawing 3 is the stray inductance value on legacy ddr 3 interface board level power supply power-supply service method plate level path;

Accompanying drawing 4 is for the present invention is based on the stray inductance value on the DDR3 interface board level power supply power-supply service method plate level path of domestic FT1500A chip.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in detail.

Should based on the DDR3 interface board level power supply power-supply service method of domestic FT1500A chip, comprise supply module PMU, DDR3 interface and domestic other interfaces of FT-1500A chip series processor, road feed circuit are drawn separately from described supply module PMU, the described DDR3 interface of independent supply, DDR3 interface feed circuit are independent of the feed circuit of described domestic other interfaces of FT-1500A chip series processor, the initial voltage caused from the stray inductance value the Power supply path of supply module PMU to DDR3 interface is avoided to fall, ensure that DDR3 interface voltage reaches ratings.

Described DDR3 interface voltage ratings is 1.5V.

Power for PCIE interface and ddr interface, accompanying drawing 2 is for the present invention is based on the DDR3 interface board level power supply power-supply service method schematic diagram of domestic FT1500A chip.As shown in drawings, draw duplex feeding circuit respectively from supply module PMU, supply DDR3 interface and PCIE interface respectively.

Accompanying drawing 4 is for the present invention is based on the stray inductance value on the DDR3 interface board level power supply power-supply service method plate level path of domestic FT1500A chip.Draw separately road feed circuit from supply module PMU, separately supply DDR3 interface, DDR3 interface power supply path stray inductance value is about 174pH.

Contrast accompanying drawing 3, stray inductance value on legacy ddr 3 interface board level power supply power-supply service method plate level path is about 215pH, can find out, the scheme that this patent proposes can make stray inductance value reduce about 19.07%, effectively reduce from the stray inductance value the Power supply path of supply module PMU to DDR3 interface, thus improve DDR3 interface power Voltage Drop, ensure that DDR3 interface voltage reaches ratings, and then ensure that the serviceability of DDR3 interface.

Claims

1. the DDR3 interface board level power supply power-supply service method based on domestic FT1500A chip, it is characterized in that: comprise supply module PMU, DDR3 interface and domestic other interfaces of FT-1500A chip series processor, road feed circuit are drawn separately from described supply module PMU, the described DDR3 interface of independent supply, DDR3 interface feed circuit are independent of the feed circuit of described domestic other interfaces of FT-1500A chip series processor, the initial voltage caused from the stray inductance value the Power supply path of supply module PMU to DDR3 interface is avoided to fall, ensure that DDR3 interface voltage reaches ratings.

2. the DDR3 interface board level power supply power-supply service method based on domestic FT1500A chip according to claim 1, it is characterized in that: described domestic other interfaces of FT-1500A chip series processor refer to the interface that supply voltage numerical value is identical with DDR3 interface supply voltage numerical value, can be PCIE interface or AGP interface.

3. the DDR3 interface board level power supply power-supply service method based on domestic FT1500A chip according to claim 1, is characterized in that: described DDR3 interface voltage ratings is 1.5V.