CN1228720C - Method and circuit for using PC card bus bar in electronic equipment with PCI standard bus bar - Google Patents
Method and circuit for using PC card bus bar in electronic equipment with PCI standard bus bar Download PDFInfo
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Abstract
The present invention relates to a method and a circuit for using PC card bus bars in electronic devices with PCI standard bus bars. An electronic device which uses PCI bus bar specification is added with a set of bus bar switching lines. The bus bar switching lines can separate a command bus bar from other PCI bus bar zones, and can receive control signals sent to a CPU of the electronic device via a control line. The control signals can control the switching actions of the bus bar switching lines and can decode received commands of the command bus bar. Therefore, when the electronic device is provided with an integrated circuit which is compatible with the PC Card bus bar specification, the electronic device can directly transmit commands which need decoding by the integrated circuit to the integrated circuit, and the commands which do not need to be transmitted to the integrated circuit can be completely isolated. Therefore, the present invention can completely avoid bus bar collision and can completely solve wrong information.
Description
Technical field
The present invention relates to a kind of change-over circuit method, refer to that especially a kind of PC of order Card bus-bar is used for the method for the electronic installation of tool PCI bus-bar specification.
Background technology
In recent years, because the computing information industry is flourish, electronic product miscellaneous and peripheral equipment constantly are developed, and be widely used in life and the working environment by all trades and professions, this development trend, not only quickened the speed and the efficient of information circulation, and be that people bring great convenience in life and work.The design of these electronic products and manufacturer, in order to cater to user's demand, produce more convenient carrying and wieldy electronic product, adhering to compact design concept invariably, continuous various expansion element (expansion Card) with various difference in functionalitys, be designed to directly to be plugged in these electronic products, with the electronic product that order is developed, more light and practical.
Press, generally be used in the expansion element of the various PCMCIA of meeting (the Personal ComputerMemory Card International Association) interface specification of notebook computer now, as: storage card (memory Card), data card (modem Card) and network card (network Card) etc., these expansion size of component are made into the size as the credit card (credit Card), make in its inserting groove (slot) that can be plugged on PCMCIA specification set on the notebook computer easily, these expand elements and are a concrete illustration under the aforementioned compact development trend.Another kind of interface specification, developed PCI (the Peripheral Component Interconnect) interface specification that by US business Intel Company, this PCI interface specification has defined the zone system (local bus system) of confluxing, and this system allows the most nearly expansion element of 10 PCI interface specifications of pegging graft on a computer.So, these electronic components independently separately traditionally, can be incorporated into easily in the electronic product this moment, not only makes electronic product more compact, more because of these expand the function that element increased, makes the performance of electronic product more become complete and practical.
In aforementioned PCMCIA and PCI interface specification, the bus system (bussystem) that uses respectively, generally be referred to as PC Card bus-bar (bus) and PCI bus-bar, though this two bus-bar has very similar specification, but still exist therebetween and somely do not exist together, promptly in this PC Card bus-bar specification except that the overwhelming majority identical with PCI bus-bar specification, still has the special specification of a part, it can be designed in the slot that is compatible to the PCMCIA specification, Zui Da difference wherein, the data and the control signal that in this PCI bus-bar, are transmitted, most of shared bus-bar (share bus) that utilizes wherein, with the slot on the desktop computer is example, data bus (data bus) in its first slot and second slot all can be in order to receive the same group of signal that is transmitted by this PCI bus-bar, so in the design of these slots, must plan certain handling procedure, make this desktop computer central processing unit when issuing an order, can be issued to the object of appointment according to order, yet, for the slot of PC Card bus-bar specification, its each slot is all corresponding to one group of PC Card bus-bar, and is completely independent from one another.
Because, in many electronic installations 2 with embedded system (Embedded system) now, number average only provides PCI bus-bar 21 mostly, consult shown in Figure 1, as the expansion element controller of CPU (central processing unit) 22 in these electronic installations 2 and the path of 23 data transmission of memory cell and exchange, so when these electronic installations 2 of design, if desire is all meeting the existing integrated circuit (IC) that the deviser requires with some on the function or on the price, be mounted to electronic installation 2, if the former integrated circuit that is designed to be used in PC Card bus-bar of these integrated circuit, then be not inconsistent because of bus-bar rule, can't be applied to using on these electronic installations of PCI bus-bar, and need reach PCI bus-bar specification according to the actual requirements, redesign exploitation one is compatible to the expansion element of PCI bus-bar specification, this measure not only need expend substantial contribution and manpower, has also delayed the development time and the efficient of electronic installation.
In addition, traditionally, be compatible to the integrated circuit 24 of the bus-bar specification of PC Card for order, can be used in one uses on the electronic installation 2 of PCI bus-bar specification, consult shown in Figure 1 again, generally all can be on the circuit board of this electronic installation 2, install a bridge (Bridge IC) 25 that PCI bus-bar 21 can be converted to PC Card bus-bar additional, the effect of this bridge 25 mainly is the bus signals with PCI bus-bar 21, be transformed on this integrated circuit 24 pin position corresponding to PC Card bus-bar, and with the common bus-bar of PCI bus-bar, expansion becomes two can be connected to the independent bus-bar that is compatible to PC Card bus-bar slot respectively, and some necessary control signals are provided.This design, though can make the integrated circuit that is compatible to PC Card bus-bar specification, be used on the electronic installation of using PCI bus-bar specification, yet, total system for this electronic installation, this bridge not only will significantly increase the cost of total system, big and the pin position is numerous because of its volume, on the circuit board of this electronic installation, take many spaces, make the volume and the appearance design of this electronic installation, design object with compact runs in the opposite direction, and does not obviously accord with the demands of the market.
Summary of the invention
In view of this, use many shortcomings of bridge for improving aforementioned conventional, special development and Design goes out the method that a kind of PC of order Card bus-bar of the present invention is used for the electronic installation of tool PCI bus-bar specification, this method is used on the electronic installation of PCI bus-bar specification one, add one group of bus-bar circuit switched, this bus-bar circuit switched can be held ordering bus-bar and all the other PCI bus-bars to separate, and by an operation circuit, the control signal that reception send the CPU (central processing unit) by this electronic installation to transmit, control the change action of this bus-bar circuit switched, and according to this order order that bus-bar received is decoded, so, when installation one is compatible to the integrated circuit of PC Card bus-bar specification on this electronic installation, this electronic installation can be decoded need by this integrated circuit order, directly transmit and give this integrated circuit, and the order that will need not be sent to this integrated circuit isolates out fully, so, just can avoid bus-bar to clash fully, thoroughly solve the phenomenon that produces error message.
A purpose of the present invention, be to utilize a circuit of quite simplifying, can replace a bridge of being installed in the aforementioned conventional circuit easily, save the cost of this bridge, in addition, because this bridge has certain volume and numerous pin position, this bridge of Therefore, omited, nature can make the circuit board of this electronic installation dwindle, or vacates on circuit board more and can utilize the space.
Another object of the present invention, be to need not to redesign the element that exploitation one is compatible to PCI bus-bar specification, only need select the integrated circuit of the PC Card bus-bar that meets deviser's requirement on the function or on the price for use, directly be mounted on this electronic installation, can realize required function, not only significantly reduce development capital and manpower, also quickened the development time and the efficient of this electronic installation.
For achieving the above object, the present invention proposes the method that a kind of PC of order Card bus-bar is used for the electronic installation of tool PCI bus-bar specification, and this method comprises:
Use in the electronic installation of PCI bus-bar specification one, add a bus-bar circuit switched, make this circuit switched with in the PCI bus-bar in order to the order bus-bar of transmission command, separate out with remaining PCI bus-bar;
Make the CPU (central processing unit) in this electronic installation, this circuit switched is controlled, be compatible to the circuit between the integrated circuit of PC Card bus-bar specification with this order bus-bar and one of conducting;
If it is not the order that a setting is read or write that this CPU (central processing unit) before issuing an order, is judged this order, promptly send a conducting control signal, be sent to this bus-bar circuit switched;
Treat that this bus-bar circuit switched receives this conducting control signal, it is the circuit between this order bus-bar of conducting and this integrated circuit, make this integrated circuit receive the order of transmitting by this order bus-bar, so that this order is decoded, and the data that according to this all the other PCI bus-bars is transmitted, handle.
If it is the order that a setting is read or write that this CPU (central processing unit) before issuing an order, is judged this order, this method comprises the following steps:
This CPU (central processing unit) will be judged the target assigned of order, whether is one to be compatible to the integrated circuit of PC Card bus-bar specification, if, promptly send a conducting control signal, be sent to this bus-bar circuit switched;
Treat that this bus-bar circuit switched receives this conducting control signal, it is the circuit between this order bus-bar of conducting and this integrated circuit, make this integrated circuit receive the order of transmitting by this order bus-bar, so that this order is decoded, and the data that according to this all the other PCI bus-bars is transmitted, handle.
This method also comprises the following steps:
If this CPU (central processing unit) judges the target that this order is assigned, be not an integrated circuit that is compatible to PC Card bus-bar specification, promptly send one and cut off control signal, be sent to this bus-bar commutation circuit;
Treat that this bus-bar circuit switched receives this cut-out control signal, promptly cut off the circuit between this order bus-bar and this integrated circuit, and return abovementioned steps, continue to wait for the control signal that receives from this CPU (central processing unit).
Description of drawings
Fig. 1 is for being compatible to the integrated circuit of PC Card bus-bar specification traditionally for order, can be used in one uses on the electronic installation of PCI bus-bar specification, and on the circuit board of this electronic installation, install a circuit box synoptic diagram that the PCI bus-bar can be converted to the bridge of PC Card bus-bar additional;
Fig. 2 is the circuit box synoptic diagram of a most preferred embodiment of the present invention;
Fig. 3 is the treatment scheme synoptic diagram of a most preferred embodiment of the present invention;
Fig. 4 is for being compatible to the detailed circuit diagram of the integrated circuit 34 of PC Card bus-bar specification among Fig. 2;
Fig. 5 is the detailed circuit diagram of bus-bar circuit switched 35 among Fig. 2.
Embodiment
General speech, employed bus system on the traditional electronic devices, can be according to the difference of its transmission signals mode, generally be divided into two kinds of shared bus-bar and independent bus-bars, the difference of maximum between these two kinds of bus-bars, be to be that a central processing unit of these electronic installations is to some integrated circuit (IC) that is connected on these bus-bars, when assigning planning (programming) order, if this bus-bar belongs to an independent bus-bar, then be connected the integrated circuit on this independent bus-bar, the object that this central processing unit is issued an order only needs itself to decode, because must be this integrated circuit to ordering; Only, if this bus-bar belongs to when using bus-bar altogether, be connected the integrated circuit on this shared bus-bar, normal because of being connected with more than one other integrated circuit on this shared bus-bar, so this integrated circuit must possess the ability of itself decoding to ordering, to judge whether the object that central processing unit is issued an order serves as oneself, whether decision carries out relevant treatment according to this order again.
By as can be known aforementioned, traditionally, the PCI bus-bar belongs to a kind of of shared bus-bar, comprise in its specification that one sets the bus signals line of read-write (Configuration read or write), make the central processing unit of electronic installation can utilize this bus signals line, plan each integrated circuit of being installed on the PCI bus-bar, and these in order to the read write command of setting in, the object that generally all uses idsel signal to specify central processing unit to issue an order.Because, the inserting groove of the different integrated circuit that on the PCI bus-bar, connected, be to be connected to different bus signals line AD, for example: the inserting groove of first integrated circuit is connected to a signal wire AD31, the inserting groove of second integrated circuit is connected to another signal wire AD30, so respectively this integrated circuit can be via received idsel signal, judge the order that central processing unit is assigned, whether need to respond, if promptly represent the object that this integrated circuit central processing unit institute desire is planned, at this moment, this integrated circuit just must be decoded to order, and finishes the desired alignment processing of order.Otherwise if integrated circuit is not the object of central processing unit institute desire planning, any processing is carried out in the order that this integrated circuit does not promptly transmit bus-bar, otherwise, will make bus-bar clash, and produce the phenomenon of signal error.
Review, PC Card bus-bar belongs to a kind of independent bus-bar, so be designed to use the various integrated circuit on PC Card bus-bar, generally all be designed to be used on the independent bus-bar, so central processing unit is assigned the object of all orders, all at this kind integrated circuit, so these integrated circuit need not to pass through idsel signal fully, judge the object that central processing unit is issued an order, therefore, on these integrated circuit general all design have can be in order to receive the pin of idsel signal.Based on this factor, if will be compatible to the integrated circuit of PCCard bus-bar hastily, directly be plugged on the pin of PCI bus-bar, it oneself is the object of central processing unit institute desire planning that this integrated circuit that is compatible to PC Card bus-bar will take for, and mistaking signal or handle causes the integrated circuit related with same on the PCI bus-bar, sends back-signalling simultaneously, cause conflict, produce wrong phenomenon.
The present invention is directed to an electronic installation 3 that is compatible to PCI bus-bar specification, consult shown in Figure 2, comprise a CPU (central processing unit) 31 in this electronic installation 3, elements such as an at least one memory cell 32 and a PCI bus-bar 33, wherein this CPU (central processing unit) 31 and memory cell 32 are connected with this PCI bus-bar 33 respectively, make this CPU (central processing unit) 31 can pass through this PCI bus-bar 33, read stored data in this memory cell 32, or data write in this memory cell 32, in this electronic installation 3 and comprise at least one inserting groove, and in the signal wire on this PCI bus-bar 33, then comprise an order bus-bar 331 and a data bus 332, wherein should refer on this PCI bus-bar 33 in order to transmit the signal wire of C/BE order by order bus-bar 331, this data bus 332 refers to all the other signal wires in order to data transmission on this PCI bus-bar 33, this data bus 332 is connected with pin on this inserting groove, on this inserting groove and be inserted with an integrated circuit 34 that is compatible to PC Card bus-bar specification, make this integrated circuit 34 can pass through this PCI bus-bar 33, the order that reception is assigned by this CPU (central processing unit) 31, or back-signalling is to this CPU (central processing unit) 31.
In a most preferred embodiment of the present invention, consult shown in Figure 2ly again, and please consult Fig. 4 and Fig. 5 simultaneously, Fig. 4 is for being compatible to the detailed circuit diagram of the integrated circuit 34 of PC Card bus-bar specification among Fig. 2, and Fig. 5 is the detailed circuit diagram of bus-bar circuit switched 35 among Fig. 2; The present invention mainly adds one group of bus-bar circuit switched 35 in this electronic installation 3, this bus-bar circuit switched 35 can be in order to the transmission C/BE order order bus-bar 331 of (and cooperating the required FRAME# signal of command decode), separate out with remaining data bus 332, this group bus-bar circuit switched 35 is also passed through a control signal 351, be connected with this CPU (central processing unit) 31, make this CPU (central processing unit) 31 control signal can be sent to this bus-bar circuit switched 35, make this bus-bar circuit switched 35 can be according to this control signal, control the change action of this bus-bar circuit switched 35, so, on this inserting groove, plug an integrated circuit 34 that is compatible to PC Card bus-bar specification at this electronic installation 3, and when its CPU (central processing unit) 31 desires are issued an order to this integrated circuit 34, this CPU (central processing unit) 31 can be passed through this control signal wire 351 simultaneously, send a control signal, be sent to this bus-bar circuit switched 35, make the circuit 352 of 34 of this C/BE order bus-bar 331 of these bus-bar circuit switched 35 conductings and this integrated circuit, make this integrated circuit 34 be received C/BE order and the required FRAME# signal of cooperation command decode, and to this C/BE order is decoded, with the data that judges whether to be transmitted with regard to this data bus 332, handle, if this CPU (central processing unit) 31 is not when this integrated circuit 34 is issued an order, 35 another control signals that transmit by this control signal wire 351 according to this CPU (central processing unit) 31 of this bus-bar circuit switched, make the circuit 352 of 34 of this this C/BE order bus-bar 331 of bus-bar circuit switched 35 cut-outs and this integrated circuit, make this integrated circuit 34 not receive the data that this data bus 332 is transmitted, so, just can avoid bus-bar to clash fully, thoroughly solve the phenomenon that produces error message.
Press, the order that this C/BE order bus-bar 331 is transmitted, set the read write command (configuration read/write command) except that comprising, still comprise memory cell read write command (memory read/write) and export read write command orders such as (I/O read/write), so one group of bus-bar circuit switched 35 only can be controlled an integrated circuit 34 that is compatible to the specification of PC Card bus-bar, if desire is installed the integrated circuit 34 that is compatible to PC Card bus-bar specification more than on this electronic installation, promptly need one group of above bus-bar circuit switched 35 respectively with its collocation, respectively this bus-bar circuit switched 35 is set the state that read write command is transferred into this integrated circuit 34 in order to control, other orders as for this bus-bar 331 transmits then must be transferred into this integrated circuit 34.
In the aforementioned embodiment, in this electronic installation 3 respectively this element consult shown in Figure 3ly according to the following step, handle, to make this integrated circuit 34 that is compatible to PC Card bus-bar specification, can receive order and the data that transmits by this CPU (central processing unit) 31 by PCI bus-bar 33.
(401) at first, this CPU (central processing unit) 31 is before issuing an order, to judge whether this order is the order that a setting is read or write, if not, promptly send a conducting control signal, by this control signal wire 351, be sent to this bus-bar circuit switched 35, and continue step (402), if promptly continue step (403);
(402) wait this bus-bar circuit switched 35 to receive this conducting control signal, i.e. the circuit 352 that this C/BE order bus-bar 331 of conducting and this integrated circuit are 34, and continue step (405);
Whether (403) this CPU (central processing unit) 31 is judged the target that this order is assigned again, be one to be compatible to the integrated circuit 34 of PC Card bus-bar specification, if not, promptly send one and cut off control signal, by this control signal wire 351, be sent to this bus-bar circuit switched 35, and continue step (404); If, promptly send a conducting control signal, by this control signal wire 351, be sent to this bus-bar circuit switched 35, and continue step (402);
(404) wait this bus-bar circuit switched 35 to receive this cut-out control signal, promptly cut off the circuit 352 of 34 of this C/BE order bus-bar 331 and this integrated circuit, and continue step (405);
(405) this integrated circuit 34 is after receiving the order of being transmitted by this C/BE order bus-bar 331, to decode and carry out this order, and judge whether data that this data bus 332 is transmitted, after continuing to handle, instead go back step (401) again, continue to wait for the control signal that receives from this CPU (central processing unit) 31.
So, the present invention can utilize the circuit design of quite simplifying, replace the big and numerous bridge in pin position of a volume of installing in the aforementioned conventional circuit easily, make on this electronic installation and to install one when being compatible to the integrated circuit of PCCard bus-bar specification, this electronic installation can be with need by this integrated circuit, the order of decoding, directly transmit and give this integrated circuit, and the order that will need not be sent to this integrated circuit isolates out fully, so, the phenomenon of thoroughly avoiding bus-bar to clash not only, and can save the cost and the installing space of this bridge, make the designer need not to redesign the element that exploitation one is compatible to PC Card bus-bar specification, only need select the integrated circuit of the PC Card bus-bar that meets deviser's requirement on the function or on the price for use, directly be mounted on this electronic installation, can realize required function, not only significantly reduce development capital and manpower, also quickened the development time and the efficient of this electronic installation.
The above embodiment only is explanation technological thought of the present invention and characteristics, its purpose makes the personage who has the knack of this skill can understand content of the present invention and is implementing according to this, when not limiting claim of the present invention with it, promptly the equalization of doing according to disclosed spirit generally changes or modifies, and must be encompassed in the claim scope of the present invention.
Claims (3)
1, a kind of PC of order Card bus-bar is used for the method for the electronic installation of tool PCI bus-bar specification, and it is characterized in that: this method comprises:
Use in the electronic installation of PCI bus-bar specification one, add a bus-bar circuit switched, make this circuit switched with in the PCI bus-bar in order to the order bus-bar of transmission command, separate out with remaining PCI bus-bar;
Make the CPU (central processing unit) in this electronic installation, this circuit switched is controlled, be compatible to the circuit between the integrated circuit of PC Card bus-bar specification with this order bus-bar and one of conducting;
If it is not the order that a setting is read or write that this CPU (central processing unit) before issuing an order, is judged this order, promptly send a conducting control signal, be sent to this bus-bar circuit switched;
Treat that this bus-bar circuit switched receives this conducting control signal, it is the circuit between this order bus-bar of conducting and this integrated circuit, make this integrated circuit receive the order of transmitting by this order bus-bar, so that this order is decoded, and the data that according to this all the other PCI bus-bars is transmitted, handle.
2, the method for claim 1 is characterized in that, is the order that a setting is read or write if this CPU (central processing unit) before issuing an order, is judged this order, and this method comprises the following steps:
This CPU (central processing unit) will be judged the target assigned of order, whether is one to be compatible to the integrated circuit of PC Card bus-bar specification, if, promptly send a conducting control signal, be sent to this bus-bar circuit switched;
Treat that this bus-bar circuit switched receives this conducting control signal, it is the circuit between this order bus-bar of conducting and this integrated circuit, make this integrated circuit receive the order of transmitting by this order bus-bar, so that this order is decoded, and the data that according to this all the other PCI bus-bars is transmitted, handle.
3, method as claimed in claim 2 is characterized in that, this method also comprises the following steps:
If this CPU (central processing unit) judges the target that this order is assigned, be not an integrated circuit that is compatible to PC Card bus-bar specification, promptly send one and cut off control signal, be sent to this bus-bar commutation circuit;
Treat that this bus-bar circuit switched receives this cut-out control signal, promptly cut off the circuit between this order bus-bar and this integrated circuit, and return abovementioned steps, continue to wait for the control signal that receives from this CPU (central processing unit).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02118461 CN1228720C (en) | 2002-04-24 | 2002-04-24 | Method and circuit for using PC card bus bar in electronic equipment with PCI standard bus bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02118461 CN1228720C (en) | 2002-04-24 | 2002-04-24 | Method and circuit for using PC card bus bar in electronic equipment with PCI standard bus bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1453711A CN1453711A (en) | 2003-11-05 |
| CN1228720C true CN1228720C (en) | 2005-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02118461 Expired - Fee Related CN1228720C (en) | 2002-04-24 | 2002-04-24 | Method and circuit for using PC card bus bar in electronic equipment with PCI standard bus bar |
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| CN (1) | CN1228720C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327365C (en) * | 2003-11-27 | 2007-07-18 | 凌阳科技股份有限公司 | System for accessing a plurality of devices using the same busbar and master control device therein |
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- 2002-04-24 CN CN 02118461 patent/CN1228720C/en not_active Expired - Fee Related
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| CN1453711A (en) | 2003-11-05 |
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