CN2190324Y

CN2190324Y - Electronic information card and its recorder

Info

Publication number: CN2190324Y
Application number: CN 93248261
Authority: CN
Inventors: 吴汉华
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-10
Filing date: 1993-12-10
Publication date: 1995-02-22
Anticipated expiration: 2003-12-10

Abstract

The utility model relates to an electronic information card and a reading and writing device thereof. The electronic information card adopts an eight-pin serial EEPROM as a recording medium, and thus the electronic information card has the advantages of small size, light weight, low cost, convenient operation, portability and stable and reliable performance. The reading and writing device is composed of a single-chip microprocessor and few peripheral elements, or the electronic information card is connected with the parallel interface of a microcomputer by a socket, and the read and the writing of the electronic information card is realized by software. The utility model has the advantages of low hardware cost and wide application.

Description

Electronic information card and its recorder

The utility model relates to a kind of electronic information card and read write line thereof.

In the relevant prior art, its function singleness, purposes are not extensive, and circuit complexity, hardware spending are big, the cost height, because card adopts parallel EEPROM, volume is big, carries inconvenience.

The purpose of this utility model is to provide a kind of electronic information card and read write line thereof, and its circuit is simple, hardware spending is little, with low cost, stable and reliable for performance.The volume of card is little, in light weight, is easy to carry, of many uses.

Technical solution of the present utility model is: electronic information card comprises the printed-wiring board (PWB) that is contained in the double-sided belt pin in the package casing, it is characterized in that being welded with on the printed-wiring board (PWB) 8 pin serial EEPROMs, the program voltage test pin of 8 pin serial EEPROMs need not, chip select pin, the data output pin, the data input pin, the clock signal pin connects first to fourth pin of printed-wiring board (PWB) component side pin, foot of the ground wire connects the 5th of printed-wiring board (PWB) component side pin, the 6th pin, the model selection pin, the operating voltage pin connects the 7th pin of printed-wiring board (PWB) component side pin, also in succession accordingly first to the 7th pin of printed-wiring board (PWB) another side pin of each pin that above-mentioned 8 pin serial EEPROMs are drawn.

The 8 pin serial EEPROMs that its feature also is to be welded on the printed-wiring board (PWB) can be made up of several pieces identical 8 pin serial EEPROMs of model, the data input pin of each sheet links to each other, and the data output pin links to each other, and the clock signal pin links to each other, chip select pin is drawn separately, is chosen respectively by program and realizes read-write.

The model of 8 pin serial EEPROMs is MCM2814, and the integrated package packing forms is the P(plastic packaging) or the little profile IC encapsulation of SOIC() or soft encapsulation IC.

A kind of read write line of reading and writing the aforementioned electronic release, comprise read-only memory that links to each other with address latch and the single-chip microcomputer that links to each other with them, it is characterized in that the read write line panel is provided with a red led, one green indicating lamp also has a card inserting mouth, the dustproof rubber membrane that cracks in the middle of sticking a slice on the card inserting mouth, be fixed with the socket of the sub-release of a plug-in in the card inserting mouth, socket is 14 pin sockets (double 7 pin), the annexation of each pin is: 1 connects 8,2 connect 9,3

companies

10,4 connect 11,5 and connect 12,6 connect 13,7 connect 14, and continuous rear socket has seven pin, and wherein chip select pin connects the P3.3 of single-chip microcomputer, the data output pin, the data input pin, the clock signal pin connects the P1 mouth of single-chip microcomputer, and foot of the ground wire connects the ground end of read write line.Socket the 6th pin connects 2,6 pin of time-base generator, the operating voltage pin connects read write line+5V end, 3 pin of time-base generator connect 1 pin of T0 pin, red light emitting diodes and the rejection gate of single-chip microcomputer, 2 pin of rejection gate meet the P3.2 of single-chip microcomputer (14), the output of rejection gate connects the base stage of triode, and its collector connects green LED.

The model of single-chip microcomputer is 8031, and the model of time-base generator is NE555, and the model of rejection gate is 74LS27, and the model of read-only memory is 2716, and the model of address latch is 74LS373.

The read write line of another kind of read-write aforementioned electronic release is that the connection plug-in unit that passes through is connected to the microcomputer parallel port, by the read-write of software realization to electronic information card, the socket that it is characterized in that the sub-release of plug-in is 14 pin sockets (double 7 pin), the annexation of each pin is, 1 connects 8,2 connect 9,3 connect 10,4 connect 11,5 connect 12,6 connect 13,7 connects 14, after linking to each other 7 pin is arranged, link to each other with microcomputer parallel port 25 core plugs by cable, the chip selection signal pin of socket connects the 4th pin of microcomputer parallel port 25 core plugs, and the data output pin connects the 3rd pin of parallel port 25 core plugs after triode amplifies, and the data input pin connects the 2nd pin of parallel port 25 core plugs, the clock signal pin connects the 5th pin of parallel port 25 core plugs, foot of the ground wire connects the 18th pin of parallel port 25 core plugs, and the operating voltage pin connects the 6th of parallel port 25 core plugs, the 7th pin, all the other pin of parallel port 25 core plugs are empty.By the read-write of microcomputer software realization to electronic information card.

Advantage of the present utility model is: 1, owing to adopted 8 pin serial EEPROMs, the volume of card is little, in light weight, easy to carry, and is with low cost; Only need externally draw 6 pin owing to 8 pin again, thereby the circuit connection is very simple, does not take system address line and data line; 2, because of card has two-sided pin, the socket of card is double 7 pin sockets, and all to be that double each pin is corresponding is connected for card and socket, thereby card is regardless of pros and cons when inserting, and card doubles with the socket contact area, and assurance contacts well; 3, the read write line circuit of being made up of single-chip minimum system is simple, only needs single-chip microcomputer to add a spot of peripheral cell, and hardware spending is little, and cost is low; 4, the read write line of being realized by microcomputer software adopts socket to link to each other with microcomputer parallel port 25 core plugs by cable, finishes read-write to release with software, has saved very considerable hardware spending; 5, stable and reliable for performance, of many uses, can be used for fields such as finance, traffic, automatic charging, encryption device, multifunctional household electrical appliance.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is an electronic information card outside drawing of the present utility model.

Fig. 2 is the core of the card of electronic information card of the present utility model.

Fig. 3 is the read write line circuit diagram that single-chip minimum system of the present utility model is formed.

Fig. 4 is a read write line outside drawing of the present utility model.

Fig. 5 is the connection layout of each pin of socket.

Fig. 6 is the main program block diagram that chip microcontroller is read and write electronic information card.

Fig. 7 is an interrupt service subroutine PITo block diagram.

Fig. 8 is that the utility model realizes that with microcomputer software the read write line of read-write capability connects plug-in unit figure.

Referring to Fig. 1, Fig. 2, is a slice model that the 8 pin serial EEPROMs (3) of MCM2814 are welded on the component side of printed on both sides wiring board (2), its chip select pin (6), data output pin (7), data input pin (8), clock signal pin (9) is connected in first to fourth pin of printed-wiring board (PWB) (2) component side pin (4), foot of the ground wire (10) connects the 5th of component side pin (4), the 6th pin, operating voltage pin (12), model selection pin (11) connects the 7th pin of component side pin (4), also in succession accordingly first to the 7th pin of printed-wiring board (PWB) (2) another side pin of each pin that above-mentioned 8 pin serial EEPROMs (3) are drawn.If containing much information of storage, can be several pieces models that each data output pin (7), data input pin (8), clock signal pin (9) of the 8 pin serial EEPROMs (3) of MCM2814 links to each other respectively, chip select pin (6) is drawn separately, is chosen respectively by program and realizes read-write.Printed-wiring board (PWB) (2) is used plastic package, and pin (4) part is exposed outside.

Referring to Fig. 3, Fig. 4, Fig. 5, read write line (29) is made up of 5 integrated packages, model be 8031 single-chip microcomputer (14) after energising+the 5V power supply automatically resets single-chip microcomputer (14) through capacitor C 1, the most-significant byte of the P2 mouth OPADD of single-chip microcomputer (14), P0 mouth timesharing OPADD least-significant byte and move instruction byte.The external model of P0 mouth is that the address latch (20) of 74LS373 and model are 2716 read-only memory (21), read-only memory is solidified with working routine in (21), finish reading and writing to electronic information card (1), its flow chart is seen Fig. 6, Fig. 7, when single-chip microcomputer (14) visit read-only memory (21), the least-significant byte address is exported by the P0 mouth, and be latched in the address latch (20) by the 30th pin ALE positive pulse signal of single-chip microcomputer (14), the address information Q0-Q7 of its output receives the address wire A0-A7 of read-only memory (21).P2.0-P2.2 meets the A8-A10 of read-only memory (21), and the data that the external program memory gating signal PSEN of single-chip microcomputer (14) connects read-only memory (21) allow output terminal OE.The socket (13) of the sub-release of plug-in (1) is 14 pin sockets (double 7 pin), and the annexation of each pin is: 1 connects 8,2 connects 9,3 and connects 10,4 and connect 11,5 and connect 12,6 and connect 13,7 and connect 14, becomes the socket that 7 pin are arranged after linking to each other.

Model is the Schmidt trigger that the time-base generator (15) of NE555 is connected into the band hysteresis characteristic, have only when the level of

input end

2,6 pin is higher than 2/3Vcc, output terminal 3 pin just become high level " 1 ", when the input end level is lower than 1/3Vcc, output just is low level " 0 ", so this circuit has very wide anti-interference level range.2,6 pin of time-base generator (15) connect the pin (136) of socket (13), when electronic information card (1) when not inserting, this pin is in high level " 1 " by resistance R 2, therefore 3 pin of time-base generator (15) are " 1 ", red light emitting diodes (17) is bright to be that red led (24) on the panel (22) is bright, and expression can be inserted electronic information card (1).Interrupt input because of 3 pin of time-base generator (15) meet single-chip microcomputer (14) TO(simultaneously again) and model be input end 1 pin of the rejection gate (16) of 74LS27, be that green indicating lamp (25) on the panel (22) does not work so green LED at quarter (18) does not work.When electronic information card (1) inserts socket (13), because going up the 5th, six bipods of printed-wiring board (PWB) (2), card links to each other, so the pin (136) of socket (13) is " 0 ", 3 pin of time-base generator (15) become " 0 " by " 1 ", and red light emitting diodes (17) is that the red led (24) on the panel (22) extinguishes; Simultaneously, the TO that the negative saltus step of 3 pin of time-base generator (15) triggers single-chip microcomputer (14) produces interruption, thereby changes interrupt service subroutine (flow chart is seen Fig. 7) over to.When the card holder inserts socket (13) with electronic information card (1), can not guaranteeing to block upward, pin contacts well simultaneously with socket (13), in order to finish correct read-write, in interrupt service subroutine, take the data in the electronic information card (1) are carried out initial testing and verification measure, promptly to MCM2814(3) the address be that the FEH byte writes a byte OAAH earlier, and then read, if read-write content unanimity, show that contact is good, otherwise continue test.Before interrupt service subroutine returns, the P3.2 pin of single-chip microcomputer (14) becomes " 0 ", and the input of rejection gate (16) is " 0 " entirely, is output as " 1 ", green LED (18) is that the green indicating lamp (25) on the panel (22) is bright, and signal can be taken out card.

Realization referring to Fig. 8, is write read-write program with the assembly language of microcomputer to the another kind of device of electronic information card (1) read-write capability, by 25 core plugs (27) that insert the microcomputer parallel port electronic information card (1) is read and write data.With one 1 to several meters long flat cables, one end is welded on the socket (26) identical with aforesaid sockets (13), the other end is connected on parallel port 25 core plugs (27), the chip select pin (267) of socket (26) connects the 4th pin of parallel port 25 core plugs (27), data output pin (266) connects the 3rd pin of parallel port 25 core plugs (27) after triode (28) amplifies, data input pin (265) connects the 2nd pin of parallel port 25 core plugs (27), clock signal pin (264) connects the 5th pin of parallel port 25 core plugs (27), foot of the ground wire (263) connects the 18th pin of parallel port 25 core plugs (27), operating voltage pin (261) connects the 6th of parallel port 25 core plugs (27), 7 pin, all the other pin of parallel port 25 core plugs (27) are empty.By the read-write of microcomputer software realization to electronic information card (1).

Because being " mouth " that be connected read write line, the socket of electronic information card goes up (P3.3 of single-chip microcomputer 8031, P1.0-P1.2 mouth or microcomputer parallel port PI0), these mouthfuls all are accurate bidirectional interfaces, every output line all will meet Vcc(+5V through a pull down resistor) voltage, therefore, even the mutual accidental short circuit of the adjacent pin in the read write line socket, can not cause component wear, not disturb the normal execution of cpu instruction yet.

Referring to Fig. 7, " the sense byte subroutine READ " in the block diagram, two assembly subroutines of " writing byte subroutine WRITE ", the sequential chart that sees also relevant MCM2814 in the semiconductor devices handbook of MOTOROLA company is write.

Claims

1, a kind of electronic information card, comprise the printed-wiring board (PWB) that is contained in the double-sided belt pin in the package casing, it is characterized in that being welded with on the printed-wiring board (PWB) (2) 8 pin serial EEPROMs (3), the program voltage test pin (5) of 8 pin serial EEPROMs (3) need not, chip select pin (6), data output pin (7), data input pin (8), clock signal pin (9) connects first to fourth pin of printed-wiring board (PWB) (2) component side pin (4) respectively, foot of the ground wire (10) connects the 5th of printed-wiring board (PWB) (2) component side pin (4), the 6th pin, model selection pin (11), operating voltage pin (12) connects the 7th pin of printed-wiring board (PWB) (2) component side pin (4), also in succession accordingly first to the 7th pin of printed-wiring board (PWB) (2) another side pin of each pin that above-mentioned 8 pin serial EEPROMs (3) are drawn.

2, a kind of electronic information card according to claim 1, the 8 pin serial EEPROMs (3) that it is characterized in that being welded on the printed-wiring board (PWB) (2) can be made up of several pieces identical 8 pin serial EEPROMs of model, the data input pin (8) of each sheet links to each other, data output pin (7) links to each other, clock signal pin (9) links to each other, chip select pin (6) is drawn separately, is chosen respectively by program, realizes read-write.

3, a kind of electronic information card according to claim 1 and 2, the model that it is characterized in that 8 pin serial EEPROMs (3) is MCM2814, the integrated package packing forms is the P(plastic packaging) or the little profile IC encapsulation of SOIC() or soft encapsulation IC.

4, a kind of read write line of electronic information card, comprise read-only memory that links to each other with address latch and the single-chip microcomputer that links to each other with them, it is characterized in that read write line (29) panel (22) is provided with a red led (24), one green indicating lamp (25) also has a card inserting mouth (23), the socket (13) that the sub-release of one plug-in (1) is arranged in the card inserting mouth (23), socket (13) is 14 pin sockets (double 7 pin), the annexation of each pin is: 1 connects 8,2 connect 9,3 connect 10,4 connect 11,5 connect 12,6 connect 13,7 connect 14, the rear socket (13) that links to each other has seven pin, wherein chip select pin (131) connects the P3.3 of single-chip microcomputer (14), data output pin (132), data input pin (133), clock signal pin (134) connects the P1 mouth of single-chip microcomputer (14), foot of the ground wire (135) connects the ground end of read write line (29), the 6th pin (136) connects 2 of time-base generator (15) on the socket, 6 pin, operating voltage pin (137) connects read write line (29)+5V end, 3 pin of time-base generator (15) connect the T0 pin of single-chip microcomputer (14), 1 pin of red light emitting diodes (17) and rejection gate (16), 2 pin of rejection gate (16) meet the P3.2 of single-chip microcomputer (14), the output of rejection gate (16) connects the base stage of triode (19), and its collector connects green LED (18).

5, the read write line of a kind of electronic information card according to claim 4, the model that it is characterized in that single-chip microcomputer (14) is 8031, the model of time-base generator (15) is NE555, the model of rejection gate (16) is 74LS27, the model of read-only memory (21) is 2716, and the model of address latch (20) is 74LS373.