CN1125862A

CN1125862A - Control electric circuit and method for hard disk/optical disk unit signal supported directly by PCMCIA interface

Info

Publication number: CN1125862A
Application number: CN 94113521
Authority: CN
Inventors: 陈志贤
Original assignee: United Microelectronics Corp
Current assignee: United Microelectronics Corp
Priority date: 1994-12-27
Filing date: 1994-12-27
Publication date: 1996-07-03
Anticipated expiration: 2014-12-27
Also published as: CN1075895C

Abstract

The method for directly supporting hard disk/optical disk drive's signals by PCMCIA interface features that an ATA logic circuit is added to PCMCIA controller chip, and the circuit comprises PCMCIA controller for converting bus signals into PCMCIA interface ones, ATA logic for converting bus signals into ATA interface ones, and a selector for selectively outputting PCMCIA or ATA interface signals under control of control signal..

Description

Directly by pcmcia interface hard disk/optical disk unit signal supported control circuit and method

The present invention is particularly to a kind of directly by PCMCIA (Personal Computer Memory CardInternational Association) hard disk/optical disk unit signal supported control circuit and the method for interface relevant for a kind of hard disk/optical disk unit signal supported device and method.

At present on PC, Winchester disk drive and CD player all have been to use extremely general standard to be equipped with, and in the interface specification that connects Winchester disk drive/CD player, most popular now also modal is so-called ATA (Advanced Technology Attachment) specification.This kind ATA specification is the signal definition specification of a kind of 40-pin, and general PC all is arranged at it in host computer system.

Use ata interface can support 4 hard disk/optical disk units altogether, yet general computer system all only is equipped with a Winchester disk drive usually when dispatching from the factory.When the user wished to expand increase Winchester disk drive or CD player, the user of desktop computer can directly take computer chassis apart to be installed additional, and the user of notebook computer is then fixing because of the structure of notebook computer, therefore installs very difficulty additional.

In order to solve aforesaid problem, there are several different modes to take in certainly.At first, the most direct mode is to imitate desktop computer, just first headspace in notebook computer when dispatching from the factory, but with regard to the compact day by day trend of notebook computer, this mode is obviously also infeasible, does not also meet cost benefit, and therefore this way seldom is used.

Another way of knowing is exactly by originally just being present in the PCMCIA joint in the notebook computer, and having seen also Fig. 1, and made a conversion chip 20, is connected with the signal of ata bus 30 through the signal with pcmcia bus 10 of conversion chip 20 thus.Utilize this method can on pcmcia interface, directly connect Winchester disk drive or CD player, yet this way still has its shortcoming, it at first is its cost that must increase conversion chip, next is the ATA signal of Winchester disk drive will to be inserted via pcmcia interface, this just must provide the software service program of card and the slot of PCMCIA, is very complicated but utilize the support of software.

In order to solve the problem that runs into when notebook computer expands the increase hard disk/optical disk unit, simultaneously also in order to overcome the aforementioned shortcoming of utilizing the mode of chip conversion, the object of the present invention is to provide a kind of control circuit and method, make that PCMCIA commonly used and ATA specification can shared interfaces, dispense above-mentioned PCMCIA and the conversion chip between ATA, and only need the adapter of simple 68 pin to 40 pin, can directly on pcmcia interface, connect Winchester disk drive or CD player.

Method of the present invention is in original PCMCIA control chip, and the ATA controller is set, and by the setting of hardware or software, makes pcmcia interface can be converted to ata interface when needed then, therefore can direct plug-in hard disk/optical disk unit.

See also Fig. 2, control circuit 100 of the present invention comprises: a pcmcia controller of knowing 40, one ATA logical circuits 50, and a MUX 60.In addition, can comprise a jumper or register 70.Wherein, pcmcia controller 40 and ATA logical circuit 50 all are connected to isa bus 80, and be connected to MUX 60 respectively, MUX 60 is controlled by the set condition of jumper or register 70 then, with the signal of selecting I/O pcmcia controller 40 or ATA logical circuit 50 to pcmcia bus 10.

In order more to clearly reveal method of the present invention, structure and feature, it is as follows that this paper conjunction with figs. describes preferred embodiment of the present invention in detail:

Fig. 1 is that the conversion pcmcia interface of knowing is the circuit block diagram of the method for ata interface;

Fig. 2 is a circuit block diagram of the present invention;

Fig. 3 is the circuit diagram of a preferred embodiment of the present invention.

See also Fig. 3, wherein, the connector 90 of pcmcia controller 40 and 68 pin is the circuits that were present in originally in the general PCMCIA control chip, and the present invention is in order to make PCMCIA and the AIA specification can a shared interface, so increased an ATA logical circuit 50 and a two-way MUX 60 (bi-direct multi-plexer) in the PCMCIA control chip.That is control circuit of the present invention is to be connected in isa bus 80, and it comprises: a pcmcia controller 40 in order to the signal of reception via aforementioned isa bus 80 inputs, and converts thereof into the pcmcia interface signal; One ATA logical circuit 50 in order to the signal of reception via aforementioned isa bus 80 inputs, and converts thereof into the ata interface signal; One two-way MUX 60, in order to receiving aforementioned pcmcia interface signal and aforementioned ata interface signal, and to be subjected to control signal control still be the ata interface signal to select I/O pcmcia interface signal; The connector 90 of one 68 pin, the connector 90 of this 68 pin are the connectors of the PCMCIA specification of a standard.And when this control circuit when supporting the ata interface specification, pcmcia interface originally only need connect the adapter of one 68 pin to 40 pin again, just is convertible into the ata interface of standard, directly connects hard disk or CD player.Aforementioned 68 pin to the pin corresponding tables of an embodiment of the adapter of 40 pin promptly shown in annex one.

Aforementioned ATA logical circuit 50 mainly is with the address signal (SA) by the isa bus input, see also Fig. 3, after the processing of a plurality of logic gates, produce chip and select (chip select) signal CS1FX# and CS3FX#, these two signals are sent to the pin B25 and the B26 of MUX 60, and are sent to the pin CE1 and the CE2 of PCMCIA connector 90 when MUX 60 is selected I/O ata interface signal.In addition and utilize the phase inverter 1X will be anti-phase by the reset signal RESETDRV of isa bus input.Other input signal does not then change.

60 of aforementioned MUX are controlled by a control signal via pin S, are set to select I/O A0 to A26, or the signal of B0 to B26 pin.Aforementioned control signal can utilize the method for a hardware mode or software to produce.Hardware mode can be used a jumper (Jumper) control output one high level signal or the low level signal pin S to multichannel selector switch 60; The method of software then can be set the parameter of basic input/output (BIOS) behind booting computer, utilize the data of a register storing and setting, and controls the position of the input/output end port of MUX 60 according to this setting data value.

Though the present invention discloses as above with a preferred embodiment; but it is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; a little change and retouching of Ying Kezuo, so protection scope of the present invention should be as the criterion with accompanying Claim institute restricted portion.Annex one

Pcmcia interface ata interface pin title pin numbering pin title pin numbering GND 1 Ground 2D3 2 DD3 1,1D4 3 DD4 9D5 4 DD5 7D6 5 DD6 5D7 6 DD7 3,CE1 7 CS1FX# 37. .. ... annex one (continuing)

Pcmcia interface ata interface pin title pin numbering pin title pin numbering IREQ 16 INTRQ 31     A2 27 DA2 3,6A1 28 DA1 3,3A0 29 DA0 35DO 30 DD0 1,7D1 31 DD1 1,5D2 32 DD2 13,IOI,S16 33 IOCS16# 32 annexes one (continuing)

Pcmcia interface ata interface pin title pin numbering pin title pin numbering GND 34 Ground 19.22GND 35 Ground 24.26     D11 37 DD11 10,D12 38 DD12 12,D13 39 DD13 14,D14 40 DD14 16,D15 41 DD15 18,CE2 42 CS3FX# 38 annexes one (continuing)

Pcmcia interface ata interface pin title pin numbering pin title pin numbering IORD 44 DIOR# 25 IOWR 45 DIOW# 23     RESET 58 RESET# 1 WAIT 59 IORDY 27INPACK 60 DMARQ 21 REG 61 DMACK# 29 annexes one (continuing)

Pcmcia interface ata interface pin title pin numbering pin title pin numbering D8 64 DD8 4D9 65 DD9 6,D10 66 DD10 8     GND 68 Ground 40.30

Claims

1, a kind of directly by the hard disk/optical disk unit signal supported method of pcmcia interface, be in the control chip of a PCMCIA, one ATA logical circuit is set, signal by the bus input can convert the pcmcia interface signal to via the pcmcia controller in the described control chip, can convert the ata interface signal to via described ATA logical circuit simultaneously.

2, the method for claim 1, wherein, described pcmcia interface signal and described ata interface signal can input in the MUX simultaneously, and described MUX can be in order to control described pcmcia interface signal of I/O or described ata interface signal.

3, method as claimed in claim 2, wherein, described MUX can be set via the method for hardware or software, with control described pcmcia interface signal of I/O or described ata interface signal.

4, a kind of directly by the hard disk/optical disk unit signal supported control circuit of pcmcia interface, described control circuit is connected to a bus, comprising:

One pcmcia controller in order to the signal of reception via the bus input, and converts thereof into the pcmcia interface signal;

One ATA logical circuit in order to the signal of reception via the bus input, and converts thereof into the ata interface signal;

One selecting arrangement in order to receiving described pcmcia interface signal and described ata interface signal, and is subjected to control signal control to select described pcmcia interface signal of I/O or described ata interface signal.

5, circuit as claimed in claim 4, wherein, described selecting arrangement is a MUX.

6, circuit as claimed in claim 4 also comprises a register, in order to write setting data in advance, controls the output of described selecting arrangement thus.

7, circuit as claimed in claim 4 also comprises a jumper, controls the output of described selecting arrangement in order to produce a control signal.