CN2218399Y

CN2218399Y - intellectual deposit rate display screen

Info

Publication number: CN2218399Y
Application number: CN 94220983
Authority: CN
Inventors: 岳昕阳
Original assignee: TUOPU COMPUTER CO CHENGDE CITY
Current assignee: TUOPU COMPUTER CO CHENGDE CITY
Priority date: 1994-09-28
Filing date: 1994-09-28
Publication date: 1996-01-24
Anticipated expiration: 2004-09-28

Abstract

The utility model discloses a deposit rate display screen which is convenient for depositors and can modify display data at any time, comprising a machine case and a monolithic microcomputer circuit. The data port of the monolithic computer 1 is connected with the data ports of an address latch 2, a data latch 6, a program memory 4, a data memory 3, and a clock chip 5. An outlet port is combined with the data output port of the address latch and then connected with a memory address port and the input of a decoder 7. An input port is connected with a function key, and a serial port is connected with the input of a shift register 8. Each output of the decoder is separately connected with the data memory, the clock chip and the chip select foot of the data latch. The outputs of the data latch and the shift register are separately connected with the segment data foot and the bit data foot of a display light emitting device through a display drive circuit.

Description

Intelligent deposit rate display screen

The utility model relates to a kind of deposit rate display screen, belongs to G09F 15/00 class notice board device.

At present, all kinds of financial deposit units of China generally show various deposit rates with the mode of word board or paper form.These display mode function singlenesses, and do not have alterability, making each interest rate change all needs to manufacture again, not only time-consuming but also require great effort.Particularly value preserving rate, every monthly variation once seldom have the savings certificate potential energy in time to announce and show the value preserving rate.Thereby bring very big inconvenience to the depositor.

In view of above-mentioned, the purpose of this utility model is a kind of convenient depositor of design, can revises the deposit rate display screen of video data at any time.

The purpose of this utility model is achieved in that intelligent deposit rate display screen has cabinet and power supply, is equipped with the single chip microcomputer circuit of being made up of single-chip microcomputer, address latch, program storage, data-carrier store, clock chip, code translator, data latches, shift register, display driver circuit, demonstration luminescent device, function key in the cabinet.Wherein:

The data port ground connection location latch of single-chip microcomputer and the data input port of data latches and program storage, data-carrier store, clock chip three's data port; After merging, the delivery outlet of single-chip microcomputer and the data output of address latch connect the input of the address mouth and the code translator of program storage, data-carrier store; The input port of single-chip microcomputer connects said function key, and serial port connects the input of shift register;

Each output of code translator connects the chip select pin of storer, clock chip and data latches;

The output of data latches connects the segment data pin that respectively shows luminescent device through display driver;

The output of shift register connects the bit data pin that respectively shows luminescent device through display driver.

The delivery outlet of single-chip microcomputer also is connected to failure indicating circuit.

After the start of deposit rate display screen, carry out self-check program earlier, machine unit then shows trouble location with code, otherwise enters normal operating conditions if fault is arranged.In normal operation, single-chip microcomputer takes out various interest rates, value preserving rate data from storer, and from clock chip take-off time, send through display driver circuit then to show that luminescent device goes to show.When single-chip microcomputer has inquired function key when pressing, the Single-chip Controlling display screen enters the modification state, and operating personnel can revise data with function key.

Below in conjunction with drawings and Examples the utility model is described in detail.

Fig. 1 and Fig. 2 are respectively governor circuit of the present utility model and display circuit schematic diagram;

Fig. 3 is an outside drawing of the present utility model.

The utility model is made up of cabinet, direct supply, governor circuit and display circuit.Its each several part structure and principle of work division are as follows:

1. power unit

Power supply selection standard computer power, get+5V ,+two groups of power supplys of 12V are as the display screen power supply.Be not described in detail in this its principle of work, its circuit theory diagrams also omit.

2. governor circuit

See Fig. 1, this circuit is the single chip microcomputer circuit, is made up of single-chip microcomputer 1, address latch 2, program storage 4, data-carrier store 3, clock chip 5, code translator 7, data latches 6, shift register 8.Wherein:

The P0 mouth of single-chip microcomputer 1 is as both data input ports of the data bus mouth ground connection location latch 2 of single chip microcomputer circuit and data latches 6 and program storage 4, data-carrier store 3, clock chip 5 threes' data port; The address bus of the synthetic single chip microcomputer circuit of the P2 mouth of single-chip microcomputer and the data output of address latch 2 connects both address mouths of program storage 4, data-carrier store 3 and the input of code translator 7; The RXD pin of single-chip microcomputer 1 connects the A and the B input pin of shift register 8, and the TXD pin connects the clock pin of shift register 8.The chip select pin of respectively exporting tap data-carrier store 3, clock chip 5 and data latches 6 threes of code translator 7.

Single-chip microcomputer 1 is the control core of governor circuit, and it takes out programmed instruction from program storage 4, complete different control function.Each start back single-chip microcomputer 1 all enters the fault self-checking state automatically, if there is fault then to send the indicating fault status code, otherwise enters the operate as normal program.In sending the process of demonstration, it takes out the initial execution time value of 20 kinds of deposit rate values, 12 kinds of index-linked interest rate values and interest rate from data-carrier store 3, from clock chip 5, take out the calendar clock value again, send data latches 6 with segment data after the decoding, send shift register 8 bit data.

3. function key and failure indicating circuit

Function key is made up of button F1～F4, the P1 mouth of a termination single-chip microcomputer of function key, other end ground connection; Failure indicating circuit is composed in series by light emitting diode L1～L4 and resistance separately, the P1 mouth of this circuit one termination single-chip microcomputer 1, another termination power.The failure code of sending from the P1 mouth in the single-chip microcomputer self check process is diode displaying thus.In addition, when single-chip microcomputer when the P1 mouth inquires the keying signal that button F1～F4 sends, single-chip microcomputer is just controlled governor circuit and is carried out the corresponding modification program.

4. power down protection circuit

This circuit conforms on decoding scheme, and it is made up of elements such as code translator 7, triode Q, diode D, rechargeable battery E, capacitor C 7, resistance R 6～R9.This circuit is finished by code translator 7 when normal operating conditions the sheet of data storer 3, clock chip 5 and data latches 6 is translated selectively sign indicating number work, when supply voltage reduces, triode Q turn-offs, battery E uprises the level that enables pin 1 of code translator 7, thereby make output pin 4～7 pin output high level of code translator, the chip selection signal of the storer 3 of its 5 pin output is compelled to draw high like this, has prevented that therefore data-carrier store 3 is by wrong read-write.Data-carrier store is powered by reserve battery E after the dead electricity, and is constant to keep its data inside chips.

5.RS-232 interface circuit

This circuit is made up of elements such as ICL232 serial interface chip 9, capacitor C 4, C5, C6, C23.The serial data that the transmission input pin T1I of this chip and reception output pin R10 connect single-chip microcomputer 1 respectively sends pin TXD and receives pin RXD.Be provided with in the serial interface chip+5V voltage to be promoted and convert to+pumping source of 12V voltage, to form standard RS-232 interface.This circuit can convert the data signals of serial of single-chip microcomputer to standard RS-232 signal, has communication function.

Display driver circuit with show luminescent device

See Fig. 2, this circuit is made up of elements such as PNP triode Q1～Q8, NPN triode Q9～Q72, eight SI PO shift register 8, resistance R 1～R136, charactron, luminous point matrix LED 1～LED64.Triode Q1～Q8 finishes segment data driving work, eight outputs of their base stage tap data latches 6, and collector connects each segment data pin that shows luminescent device.Eight SI PO shift register 8 are concatenated into 64 bit shift register, wherein the data input pin of first shift register connects the RXD pin of single-chip microcomputer, the data input pin of the shift register of back then connects the high-order output pin of previous shift register successively, and the clock pin of each shift register all connects the TXD pin of single-chip microcomputer.Send the bit data that respectively shows luminescent device pin respectively after the shift signal amplification of triode Q9～Q72 with eight shift registers, gating is lighted corresponding light-emitting nixie tube and dot matrix.

Each circuit of the present utility model and power supply all are contained in the rectangle cabinet shown in Figure 3, are followed successively by power lead, function key and power switch among the figure on the sidewall of cabinet from top to bottom.

The utility model has the advantages that:

Have the demonstration function, can show current, regularly, installment, whole stole only take, Kind of interest rate value surplus overseas remittance, the wholesale savings six big classes 20; Show the initial time of implementation of interest rate; Show 12 months value preserving rate values; Show the moon, day, week, the time, the minute, second time value.

Have numerical value and revise function, with the various demonstration data of key prosecutor formula rewritable.

Have the value storage function, be provided with the data cut-off protection circuit, the data that deposit in can Long preservation.

Have the fault self-checking function, show self-contained circuit with light emitting diode with code form The fault position.

Have the data communication function, be provided with RS-232 interface, can join with computer Machine is realized exchanges data and teletransmission data modification function.

Claims

1. intelligent deposit rate display screen has cabinet and direct supply, it is characterized in that: the single chip microcomputer circuit of being made up of single-chip microcomputer (1), address latch (2), program storage (4), data-carrier store (3), clock chip (5), code translator (7), data latches (6), shift register (8), display driver circuit, demonstration luminescent device, function key is housed in the cabinet, wherein:

The data port ground connection location latch (2) of single-chip microcomputer (1) and both data input ports of data latches (6) and program storage (4), data-carrier store (3), clock chip (5) three's data port; After merging, the data output of the delivery outlet of single-chip microcomputer and address latch (2) connects the input of program storage (4), both address mouths of data-carrier store (3) and code translator (7); The input port of single-chip microcomputer connects said function key, and serial port connects the input of shift register (8);

The chip select pin of respectively exporting tap data-carrier store (3), clock chip (5) and data latches (6) of code translator (7);

The output of data latches (6) connects the segment data pin that respectively shows luminescent device through display driver circuit;

The output of shift register (8) connects the bit data pin that respectively shows luminescent device through display driver circuit.

2. intelligent deposit rate display screen according to claim 1 is characterized in that: it also has serial interface chip (9), and the serial data that the transmission input pin of this chip and reception output pin connect single-chip microcomputer (1) respectively sends pin and receives pin.

3. intelligent deposit rate display screen according to claim 1 and 2 is characterized in that: it also has the failure indicating circuit that is composed in series by light emitting diode and resistance, and the delivery outlet of this circuit and single-chip microcomputer (1) joins.