CN2266153Y

CN2266153Y - Intelligent graph and text telephone terminal

Info

Publication number: CN2266153Y
Application number: CN 96222706
Authority: CN
Inventors: 卢晓科
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-28
Filing date: 1996-08-28
Publication date: 1997-10-29
Anticipated expiration: 2006-08-28

Abstract

The utility model relates to an intelligent graph and text telephone terminal which is composed of a display controlling circuit, a main controlling circuit and a keyboard circuit. The utility model is characterized in that two parallel position buffers 8 connected between a CPU1 and a CPU2 of the display controlling circuit and the main controlling circuit, and the opposite phase of an output open circuit forming a two-shipper handshaking circuit form a two-shipper communication circuit. A blinking memory of the terminal uses a distant host and a communication program to load application software and data. The keyboard circuit uses a diode to translate the code directly. The terminal has the advantages of simple structure, low cost, high speed of writing screen, high work efficiency, simple keyboard, etc.

Description

Intelligent graphic message telephone terminal

The utility model relates to a kind of terminal device of telephone network.

At present, general calculation machine terminal device kind is a lot, and homemade has: state's light, dolphin, Fuda, tree peony etc., external special-purpose terminal has 3270 of IBM, the VT-100 of DEC and international famous brand WAYS.Above-mentioned terminal device technology is more advanced, and price is also higher, generally all designs as common apparatus.Nearest 1 year, a kind of babyphone terminal of liquid crystal display also began to come out, and most representative is wide company and the Japanese wide telephone terminal of cooperating.Above terminal and telephone terminal are all as the common apparatus design, and in order to satisfy the needs of each side development, it is more complete that function designs, thereby price is higher.They all are pure terminal devices in addition, do not contain any application software, in case left main frame, just can't work.Except that two above-mentioned big shortcomings, also have following 3 weak points, some dedicated system of the first, as: real-time foreground system, the use of PC is more loaded down with trivial details, and operating personnel are had relatively high expectations; It two is that the use of terminating machine too relies on main frame, and some are had the system of specific (special) requirements, as the change of keyboard and mode of operation difficulty relatively again; It three is that the universal telephone terminal exists character and shows fewly, and picture is clear inadequately, can not display graphics etc. deficiency.

The purpose of this utility model is to provide a kind of intelligent graphic message telephone terminal, and then reaches following purpose:

1, can under non-on-line mode, work;

2, can display text, again can display graphics and image;

3, price is low, simple to operate;

4, be mainly used in dedicated system, also can satisfy the requirement of general-purpose system simultaneously.

The utility model is made up of display control circuit, governor circuit and keyboard circuit; Display circuit wherein comprises: character chip IC ₄, Display Register IC ₁₂, auxiliary circuit; Governor circuit wherein comprises: flash memory IC ₀₅, static memory IC ₀₆, serial communication circuit IC ₁₁, IC ₁₂, IC ₁₃, IC ₁₄It is characterized in that: display circuit and governor circuit also comprise central processor CPU separately ₂, CPU ₁, described CPU ₁, CPU ₂Constitute the two machine communication circuit, described dual-machine communication circuit is by being connected CPU ₁, CPU ₂Between two parallel 8 buffer IC ₁₅, IC ₁₆Inverter ic with the output open circuit that constitutes the two-shipper handshake circuit ₁₃Form; The P of two single-chip microcomputers ₁₁Be data output token position, the while is as the look-at-me line of receiving chip; P ₁₂Be the data accepted flag position; CPU ₁P ₁₁With CPU ₂P ₁₂Constitute a unidirectional handshake circuit; Otherwise, CPU ₂P ₁₁With CPU ₁Be P ₁₂Constitute the handshake circuit of another direction, P ₁₁With P ₁₂Bistable circuit two ends that the pair of phase inverters of the phase inverter by output open circuit constitutes connect, and put 0 and are operating as and put 0 earlier, and rearmounted 1 activates, and its port and handshake circuit have determined that its value still is 0; Described flash memory IC ₀₅Be application software and data to be packed into by distance host and communication program; Described display control circuit is mainly by IC ₁₀, IC ₁₁Two programmable sieve are collected array chip and are formed; Display circuit also comprises: the display interface device PIN that is connected with display driver chip ₂, and dual-machine communication interface PIN ₁Governor circuit also comprises: a keyboard interface PIN ₃, a dual-machine communication interface PIN ₁Interface PIN with a serial communication circuit ₂, described PIN ₂Be connected with MODEM module in the machine or external MODEM and enter public switched telephone network and constitute and the getting in touch of remote host, engage in the dialogue and data communication; As main line, 1 in per 5 is that compound keys is used to described keyboard circuit by 5 or 10 single data buses, and all the other 4 are common key-press decoding usefulness, every line all has one to draw high resistance, when 5 lines when being high entirely, is the on-keyboard input, when being not 0 entirely, the keyboard input is just arranged; 4 single data buses except that the 1 single data bus of using as compound keys are connected with 8 buttons by the connected mode of 1 to 3 diode with permutation and combination respectively, constitute the circuit of directly deciphering with diode.

The utlity model has following effect:

In a single day 1. adopt non-volatile memory chip and related management software, make application software download to terminal from main frame, and obtained application software by telephone network, unless need to upgrade, otherwise can forever preserve down.Renewal to software can be carried out under dynamic remote mode;

2. adopt extensive programmable integrated circuit to be used for the control of display circuit, overcome general computing machine and adopted CRTC display control chip CPU is had relatively high expectations, peripheral circuit is more complicated also, the shortcoming that cost is high.

3. this device employing gate array is to design for interface microcontroller specially; Can give full play to the characteristics of single-chip microcomputer at a low price, improve the speed of writing screen.

4. adopt two CPU working methods, to increase work efficiency;

5. the keyboard of this device can be configured according to different application systems, little is configurable as telephone key-press, have only 12 or less than 20 keys, many to more than tens, owing to adopt the method for directly deciphering with diode, the common mode with the scanning of single-chip microcomputer procession is compared, and structure is more simple, price is more cheap;

6. this device is primarily aimed at the display of the low TV compatibility of price comparison, and specific targets are as follows:

Graphic dot matrix: 388 * 256

Chinese character shows: 24 row (character 48 row) * 13 row

Character attibute: normal, anti-phase, highlighted, flicker

Write screen speed: all over the screen＜0.1 second

The monitor higher as usability, figure and Chinese character show that index all can improve greatly.

The drawing explanation:

Fig. 1 is a structured flowchart of the present utility model.

Fig. 2 is a display controller logic diagram of the present utility model

Fig. 3 is display control circuit figure of the present utility model.

Fig. 4 is governor circuit figure of the present utility model

Fig. 5 is a dual-machine communication circuit diagram in demonstration control of the present utility model and the governor circuit.

Fig. 6 is keyboard circuit figure of the present utility model.

Fig. 7 is the two machine communication process flow diagram.

Embodiment of the present utility model sees accompanying drawing: display control circuit is partly seen Fig. 3, comprising: CPU ₂(IC ₁), Chinese character base (IC ₀₄), Display Register (IC ₁₂), display controller (IC ₁₀, IC ₁₁), auxiliary circuit, two machine communication circuit (IC ₁₅, IC ₁₆, IC ₁₈), governor circuit sees Fig. 4, comprising: CPU ₁(IC ₀₁), flash memory (IC ₀₅), static memory (IC ₀₆), serial communication circuit (IC ₁₁, IC ₁₂, IC ₁₃, IC ₁₄) wait circuit.IC wherein ₁₂, IC ₁₃, IC ₁₄And PIN ₂(DB ₂₅) is connected with MODEM module or external MODEM in the machine and enters that the public circuit switching network constitutes and the getting in touch of remote host, engage in the dialogue and data communication.

System software is divided into management software and application software two parts, and management software mainly is responsible for equipment control and communication etc., and application software and data can be contained in non-volatile memory feature IC by main frame and communication program ₀₅Among, IC ₀₅Be 29EE010,1M position or 29EE040,4M position.Have one section to be responsible for the communication management of uploading and downloading specially in the system program, the data that upload and will read by the fair meter of password password main frame in the storage chip utilize this function can realize the monitoring (as tax supervision) of main frame to terminal.Download and the data of main frame and program can be packed in the storage chip, can realize the inquiry of data, ask for kinetic energy such as renewal with program.

PIN in Fig. 4 ₅Be by IC ₀₁(8051) another serial communication interface that provides, it links to each other PIN with mini-printer in the main frame ₃Be keyboard interface, the PIN among it and Fig. 6 ₁Connect.PIN ₁Be the dual-machine communication interface, with the PIN of Fig. 3 ₁Connect, constitute parallel communication.

IC among Fig. 3 ₀₄Be character chip, deposited GB GB2312 15 * 16 Chinese character dot matrix data.IC ₁₂Be to show refresh memory (static store chip 62256 etc.), provide character display and graphic dot matrix to refresh storage.IC ₁₄Be that the display driver chip display message is through PIN ₂Export on the display.IC ₁₀And IC ₁₁Being two programmable logic array chips, serves as the main display circuit that constitutes with this two chip, is a basic read-write sequence with 8 pixels, in a basic sequential, is divided into 4 different read-write cycles again, and its first cycle is the CPU read-write cycle; Second period is the first byte read cycle of CRT; Period 3 is an external write cycle; Period 4 is the second byte read cycle of CRT.Under character mode, first byte of CRT is an attribute, and second byte is a character pattern; Under figure and image mode, first and second byte is dot pattern; Under image mode, need the more storage chip of configuration, will read the view data of 2 or 4 bytes simultaneously at each CRT in the read cycle.

IC in the dual-machine communication circuit diagram ₁₅With IC ₁₆Be two parallel 8 buffers, IC ₁₈Constitute the two-shipper handshake circuit.IC ₁₈(74LS05) be the phase inverter of output open circuit, single-chip microcomputer (IC ₁With IC ₂) P ₁₁Be data output token position, the while is as the look-at-me line of receiving chip; P ₁₂Be the data accepted flag position.CPU ₁P ₁₁With CPU ₂P ₁₂Constitute a single-phase handshake circuit, otherwise constitute the handshake circuit of another direction.P ₁₁With P ₁₂Bistable circuit two ends that pair of phase inverters by 74LS05 constitutes connect.Its workflow is seen Fig. 7.

Keyboard circuit is seen Fig. 6, and as main line, wherein 1 is the compound keys use by 5 single data buses, and all the other 4 is that common key-press decoding is used.Every line all has one to draw high resistance.When root line when being high entirely, be the keyboard input like this.When being not 0 entirely, the keyboard input is just arranged.When CPU need adopt the interruption of work mode, its non-complete 0 signal can be translated and make look-at-me.When a key was pressed, its pairing coding was directly produced by its decoding diode.Diode as the button of a need output code 5, so only needs two diodes only to electronegative potential decoding, and one is connected on DD0, and one is connected on DD2 and upward gets final product.

Claims

A kind of intelligent graphic message telephone terminal, it is made up of display control circuit, governor circuit and keyboard circuit; Display circuit wherein comprises: character chip IC ₄, Display Register IC ₁₂, auxiliary circuit; Governor circuit wherein comprises: flash memory IC ₀₅, static memory IC ₀₆, serial communication circuit IC ₁₁, IC ₁₂, IC ₁₃, IC ₁₄It is characterized in that: display circuit and governor circuit also comprise central processor CPU separately ₂, CPU ₁, described CPU ₁, CPU ₂Constitute the two machine communication circuit, described dual-machine communication circuit is by being connected CPU ₁, CPU ₂Between two parallel 8 buffer IC ₁₅, IC ₁₆Inverter ic with the output open circuit that constitutes the two-shipper handshake circuit ₁₈Form; The P of two single-chip microcomputers ₁₁Be data output token position, the while is as the look-at-me line of receiving chip; P ₁₂Be the data accepted flag position; CPU ₁P ₁₁With CPU ₂P ₁₂Constitute a unidirectional handshake circuit; Otherwise, CPU ₂P ₁₁With CPU ₁Be P ₁₂Constitute the handshake circuit of another direction, P ₁₁With P ₁₂Bistable circuit two ends that the pair of phase inverters of the phase inverter by output open circuit constitutes connect, and put 0 and are operating as and put 0 earlier, and rearmounted 1 activates, and its port and handshake circuit have determined that its value still is 0; Described flash memory IC ₀₅Be application software and data to be packed into by distance host and communication program; Described display control circuit is mainly by IC ₁₀, IC ₁₁Two programmable sieve are collected array chip and are formed; Display circuit also comprises: the display interface device PIN that is connected with display driver chip ₂, and dual-machine communication interface PIN ₁Governor circuit also comprises: a keyboard interface PIN ₃, a dual-machine communication interface PIN ₁Interface PIN with a serial communication circuit ₂, described PIN ₂Be connected with MODEM module in the machine or external MODEM and enter public switched telephone network and constitute and the getting in touch of remote host, engage in the dialogue and data communication; As main line, 1 in per 5 is that compound keys is used to described keyboard circuit by 5 or 10 single data buses, and all the other 4 are common key-press decoding usefulness, every line all has one to draw high resistance, when 5 lines when being high entirely, is the on-keyboard input, when being not 0 entirely, the keyboard input is just arranged; 4 single data buses except that the 1 single data bus of using as compound keys are connected with 8 buttons by the connected mode of 1 to 3 diode with permutation and combination respectively, constitute the circuit of directly deciphering with diode.