CN2828931Y - Palm hardware equipment capable of using computing programe for operating soil measurement formula fertilizing - Google Patents

Abstract

The utility model relates to palm hardware equipment capable of using computing program for operating soil measurement formula fertilizing, which comprises a display screen and keys, a main control circuit, a display circuit, a keyboard input circuit, a power supply circuit and a reset circuit, wherein the display screen and the keys are arranged on a casing; the main control circuit is composed of a chip IC1 of a single chip machine 89C55, an LMBGA_032_49 CK module IC2, an 8279 chip IC3, a 74 LS138 coding chip IC4, an MAX810 chip IC5, an MAX 1677 chip IC6, resistors R1 to R13, a sliding rheostat R14, capacitors C1, C4, C6 to C10, electrochemical capacitors C2, C3 and C5, electric inductance L1 and L2, a crystal oscillator W1, diodes D1 and D2, a power input terminal Vin with +3V a power supply output terminal Vout 1 with +5V, a power supply output terminal Vout 2 with-23 v, and joints G, H and I. The utility model can be used as a running platform for the computing program for operating soil measurement and formula fertilizing. The utility model has the characteristics of small volume, convenient use, simple operation and low price.

Description

Can be used to move the hand held hardware device of fertilization compositions based on earth measurement calculation procedure

Technical field

The utility model relates to a kind of programmable single chip computer hardware, particularly relates to a kind of hand held hardware device that can be used to move the fertilization compositions based on earth measurement calculation procedure.

Background technology

At present, by the nutritional labeling in the chemical examination agricultural land soil, the foster soil testing and formulated fertilization method that need sow which kind of fertilizer in the farmland that how much calculates of the consumption of the crop of plantation has been a kind of method very commonly used as required again, fertilization compositions based on earth measurement calculation procedure according to this method establishment, it is a kind of very strong applet of specific aim that computer hardware is not had special requirement, it can move on existing any desk-top or notebook computer, but owing to desk-top or notebook computer cost an arm and a leg, bulky, complicated operating process, so it is very inconvenient that it uses for operability very strong fertilization compositions based on earth measurement in field calculates, especially for remote rural area, it is particularly outstanding that above-mentioned inconvenience seems; The applicant of the utility model patented claim has also developed a kind of fertilization compositions based on earth measurement calculation procedure with fertilization compositions based on earth measurement computing function according to its practical experience for many years, this program can be moved on existing desk-top or notebook computer, and it needs 34 key positions altogether.

Summary of the invention

The purpose of this utility model is to provide the hand held hardware device that a kind of volume is little, easy to use, terse, cheap, with strong points can being used to of operation moves the fertilization compositions based on earth measurement calculation procedure.

The purpose of this utility model is achieved in that a kind of hand held hardware device that can be used to move the fertilization compositions based on earth measurement calculation procedure, comprise the display screen and the button that are arranged on the housing, it also includes operating voltage, model is the singlechip chip IC1 of 89C55, model is LMBGA_032_49CK_ module I C2, model is 8279 chip IC 3, model is the coding chip IC4 of 74LS138, model is the chip IC 5 of MAX810, model is the chip IC 6 of MAX1677, resistance R 1=820K, R2=45K, R3=330K, R4=110K, R5=R6=100K, R7=10 Ω, R8=R9=R10=R11=R12=R13=5.1K, slide rheostat R14=10K, capacitor C 1=C4=C6=C7=C8=0.1u, C9=C10=20pF, electrochemical capacitor C2=C3=100u, C5=4.7u, inductance L 1=L2=10u, brilliant shake W1=12MHZ, diode D1=D2=BAT85, + 3V power input Vin, + 5V power output end Vout1 ,-23V power output end Vout2 and contact G, H, I; Above-mentioned device constitutes governor circuit, display circuit, keyboard input circuit, power circuit and reset circuit;

I. governor circuit is to be the singlechip chip IC1 of 89C55 by operating voltage for+5V, model, and capacitor C 7, C9, C10 and brilliant shake W1 form;

Wherein IC1+the 5V operating voltage provides by Vout1, C7 is arranged between Vout1 and the ground; Clock circuit adopts internal clock circuit, and the C9 and the C10 of crystal oscillator W1 and series connection mutually are arranged in parallel between 18,19 pin of IC1 the link ground connection of C9 and C10; 9 pin of IC1 link to each other with 2 pin of IC5;

II. display circuit is to be LMBGA_032_49CK_ module I C2 by model, and slide rheostat R14 forms;

The 1 pin ground connection of IC2 wherein, 2 pin link to each other with Vout1, and contrast adjustment voltage 3 pin link to each other with the sliding end of R14, and link to each other with Vout2 two stiff ends of R14 of 17 pin link to each other with 17 pin with 2 pin of IC2 respectively and regulate contrast voltage; 4 pin of IC2 are that data-signal is selected pin, link to each other with 22 pin of IC1, are come the selection of control signal by 22 pin of IC1; 5,6 pin of IC2 link to each other with 16,17 pin of IC1 respectively; 7～14 pin of IC2 are ternary data bus DB0～DB7, are connected with 1～8 pin of IC1 respectively; 15 pin of IC2 are that the chip selection signal low level is effective, directly ground connection; Because what adopt is 8080 series monolithic chips, so 18 pin of IC2 connect low level, direct ground connection; 16 pin of IC2 are reset pin, link to each other with 2 pin of IC5;

III. the keyboard input circuit is to be 8279 chip IC 3 by model, and model is the coding chip IC4 of 74LS138, and resistance R 8～R13 and capacitor C 8 are formed;

The keyboard input circuit has used the keyboard input circuit of 6 * 6 totally 36 keys, and wherein 12～19 pin of IC3 are ternary according to bus, connect 39～32 pin of IC1 respectively; 4 pin of IC3 are that interrupt pin links to each other with outer interrupt pin 13 pin of IC1; Chip selection signal 22 pin of IC3 link to each other with 28 pin of IC1; Read-write gating signal 10,11 pin of IC3 link to each other with 17,16 pin of IC1 respectively; 21 pin of IC3 link to each other with 21 pin of IC1; 3 pin of IC3 link to each other with 30 pin of IC1, and clock input signal CLK is provided by 30 pin of IC1; 9 pin of IC3 link to each other with 2 pin of IC5 and reset; 32,33,34 pin of IC3 link to each other with 1,2,3 pin of IC4 respectively; 1,2,5,6,38,39 pin of IC3 are column signal incoming lines of keyboard matrix, and high level is effective, and it links to each other with Vout1 by R8～R13 respectively; 7,8 pin of IC3 need not, need connect high level, link to each other with Vout1; 36, the 37 pin ground connection of IC3; The operating voltage of IC3 is provided by Vout1, is connected to C8 between Vout1 and ground; 6 pin of IC4 link to each other with Vout1,4,5 pin ground connection, and 10～15 pin are output as the keyboard horizontal scanning line;

IV. power circuit is to be the chip IC 6 of MAX1677 by model, resistance R 1～R7, capacitor C 1, C4, C6, electrochemical capacitor C2, C3, C5, inductance L 1, L2, diode D1, D2 ,+3V power input Vin, + 5V power output end Vout1 ,-23V power output end Vout2 and contact G, H, I form;

Wherein 1 pin of IC6 links to each other with 9 pin by the C1 shunt capacitance, and 9 pin ground connection link to each other by R7 between 1 pin of IC6 and 16 pin; 3 pin of IC6 are battery low pressure detection comparator input end, and inner threshold voltage is 614mV, and it is provided with battery low pressure by external divider resistance R5, R6 and detects level, the other end ground connection of R6, and the other end of R5 links to each other with Vin; 5 pin of IC6 are synchronous clock and PWM model selection input end, link to each other with 1 pin, connect high level; 6 pin of IC6 are LCD bias circuit Enable Pin, and 11 pin of the IC6 that links to each other with 1 pin are the Enable Pin of chip, and high level starts IC6, links to each other with 1 pin; 7 pin of IC6 are LCD bias polarity selecting side, link to each other with 14 pin and 10 pin of ground connection IC6 are LCD booster circuit feedback input end, and itself and the indirect R2 of 8 pin, at 10 pin and the indirect R1 of G point, adjusting R1, R2 resistance can change the output voltage of Vout2; 2 pin of IC6 are main booster circuit feedback input end, and its outer meeting resistance R3 exports 5V voltage to 16 pin, and 2 pin of IC6 are simultaneously by R4 ground connection; 13 pin of IC6 meet C4 to 8 pin and ground connection; Be connected with C6 between 12 pin of IC6 and H point, and be connected with L2 between the I point; Be connected with L1 between the 15 pin master booster circuit internal power switch drain of IC6 and I point; Be connected with D1 between I point and the H point, be connected with D2 between H point and the G point; Be connected with C5 between G point and the ground; Vin links to each other with the I point, simultaneously by C3 ground connection; 16 pin of IC6 are that the output terminal of main booster circuit power supply links to each other with Vout1, and the Vout1 of IC6 is output as+5V voltage, and 16 pin are simultaneously by C2 ground connection; Vout2 links to each other with the G point, and the Vout2 of IC6 is output as-23V voltage;

V. reset circuit is that the chip IC 5 of MAX810 is formed by model; Wherein 1 pin of IC5 links to each other with Vout1, and 2 pin are received 9,16,9 pin of IC1, IC2, IC3,3 pin ground connection respectively.

Because the utility model adopts 8 single-chip microcomputer 89C55, it has the Flash flash memory of 20K byte, erasable more than 1000 times, the internal RAM of 256 B, 32 lines programmable I/O mouth, three 16 bit timing device/counters, frequency of operation 0～12MHZ, 8 interrupt sources, maximum addressable scope is 64K, maximum 36 key boards inputs; It also has the LCD liquid crystal display, embedded SED1335 controller, 32K * 8SRAM, driver element, liquid crystal board etc. have 160 kinds of inner character generators, and the display-memory of energy partition management 64K, can 4 bit data parallel the transmission, the maximum drive ability is 640 * 256 dot matrix; Above-mentioned hardware index of the present utility model can satisfy the requirement of the various fertilization compositions based on earth measurement calculation procedures of most existing to hardware, so the utility model can be as most existing fertilization compositions based on earth measurement calculation procedure, the operation platform that comprises the fertilization compositions based on earth measurement calculation procedure that the applicant is self-editing, it has only hand size, and its using method is similar to the method for using common counter; Therefore the utlity model has that volume is little, easy to use, terse, cheap, the portable characteristics of operation; Certainly the utility model also goes for other any program that can move thereon.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

Fig. 1 is an electrical block diagram of the present utility model

Panel construction synoptic diagram when Fig. 2 is used to move the self-editing fertilization compositions based on earth measurement calculation procedure of applicant for the utility model

Fig. 3 is the process flow diagram of the self-editing fertilization compositions based on earth measurement calculation procedure of applicant

Embodiment

A kind of hand held hardware device that can be used to move the fertilization compositions based on earth measurement calculation procedure, comprise the display screen (2) and the button (3) that are arranged on the housing (1), it also includes operating voltage, model is the singlechip chip IC1 of 89C55, model is LMBGA_032_49CK_ module I C2, model is 8279 chip IC 3, model is the coding chip IC4 of 74LS138, model is the chip IC 5 of MAX810, model is the chip IC 6 of MAX1677, resistance R 1=820K, R2=45K, R3=330K, R4=110K, R5=R6=100K, R7=10 Ω, R8=R9=R10=R11=R12=R13=5.1K, slide rheostat R14=10K, capacitor C 1=C4=C6=C7=C8=0.1u, C9=C10=20pF, electrochemical capacitor C2=C3=100u, C5=4.7u, inductance L 1=L2=10u, brilliant shake W1=12MHZ, diode D1=D2=BAT85, + 3V power input Vin ,+5V power output end Vout1 ,-23V power output end Vout2 and contact G, H, I; Above-mentioned device constitutes governor circuit, display circuit, keyboard input circuit, power circuit and reset circuit;

I. governor circuit is to be the singlechip chip IC1 of 89C55 by operating voltage for+5V, model, and capacitor C 7, C9, C10 and brilliant shake W1 form;

Wherein IC1+the 5V operating voltage provides by Vout1, C7 is arranged between Vout1 and the ground; Clock circuit adopts internal clock circuit, and the C9 and the C10 of crystal oscillator W1 and series connection mutually are arranged in parallel between 18,19 pin of IC1 the link ground connection of C9 and C10; 9 pin of IC1 link to each other with 2 pin of IC5;

There is the Flash flash memory of 20K byte IC1 inside, and is erasable more than 1000 times, and RAM, 32 lines programmable I/O mouth, three 16 bit timing device/counters of 256B are arranged, and frequency of operation 0～12MHZ has 8 interrupt sources, and its maximum addressable scope is 64K; Also available similar chip of IC1 such as replacements such as 89C51,89C52, its pin connection is just the same;

II. display circuit is to be LMBGA_032_49CK_ module I C2 by model, and slide rheostat R14 forms;

The 1 pin ground connection of IC2 wherein, 2 pin link to each other with Vout1, and contrast adjustment voltage 3 pin link to each other with the sliding end of R14, and 17 pin link to each other with Vout2; Two stiff ends of R14 link to each other with 17 pin with 2 pin of IC2 respectively and regulate contrast voltage; 4 pin of IC2 are that data-signal is selected pin, link to each other with 22 pin of IC1, are come the selection of control signal by 22 pin of IC1; 5,6 pin of IC2 link to each other with 16,17 pin of IC1 respectively; 7～14 pin of IC2 are ternary data bus DB0～DB7, are connected with 1～8 pin of IC1 respectively; 15 pin of IC2 are that the chip selection signal low level is effective, directly ground connection; Because what adopt is 8080 series monolithic chips, so 18 pin of IC2 connect low level, direct ground connection; 16 pin of IC2 are reset pin, link to each other with 2 pin of IC5;

IC2 also can adopt other to substitute with generic module; The LMBGA_032_49CK_ module is the LCD MODULE LCM of built-in SED1335 controller, it is backlight by CCFT, SED1335 controller, 32K * 8SRAM, driver element, liquid crystal board etc. are partly formed, wherein the SED1335 controller is the core of module, ability with more powerful I/O impact damper, stronger management display-memory, 160 kinds of inner character generators are arranged, and characteristics such as display-memory and the flicker of energy partition management 64K show, some displacement, SED1335 can also send so that 4 bit data are parallel, and the maximum drive ability is 640 * 256 dot matrix;

III. the keyboard input circuit is to be 8279 chip IC 3 by model, and model is the coding chip IC4 of 74LS138, and resistance R 8～R13 and capacitor C 8 are formed;

The keyboard input circuit has used the keyboard input circuit of 6 * 6 totally 36 keys, and wherein 12～19 pin of IC3 are ternary according to bus, connect 39～32 pin of IC1 respectively; 4 pin of IC3 are that interrupt pin links to each other with outer interrupt pin 13 pin of IC1; Chip selection signal 22 pin of IC3 link to each other with 28 pin of IC1; Read-write gating signal 10,11 pin of IC3 link to each other with 17,16 pin of IC1 respectively; 21 pin of IC3 link to each other with 21 pin of IC1; 3 pin of IC3 link to each other with 30 pin of IC1, and clock input signal CLK is provided by 30 pin of IC1; 9 pin of IC3 link to each other with 2 pin of IC5 and reset; 32,33,34 pin of IC3 link to each other with 1,2,3 pin of IC4 respectively; 1,2,5,6,38,39 pin of IC3 are column signal incoming lines of keyboard matrix, and high level is effective, its respectively by R8～R13 link to each other with Vout1 IC3 7,8 pin need not, need connect high level, link to each other with Vout1; 36, the 37 pin ground connection of IC3; The operating voltage of IC3 is provided by Vout1, is connected to C8 between Vout1 and ground; 6 pin of IC4 link to each other with Vout1,4,5 pin ground connection, and 10～15 pin are output as the keyboard horizontal scanning line;

It is that IC3 and 3-8 coding chip 74LS138 are IC4 that the keyboard input circuit has used general programmable keyboard interface chip 8279; The IC3 operating voltage is 5V, carries 8 orders; IC4 has 14 pins, and operating voltage also is 5V, all input end CMOS level compatibilities;

IV. power circuit is to be the chip IC 6 of MAX1677 by model, resistance R 1～R7, capacitor C 1, C4, C6, electrochemical capacitor C2, C3, C5, inductance L 1, L2, diode D1, D2 ,+3V power input Vin, + 5V power output end Vout1 ,-23V power output end Vout2 and contact G, H, I form;

Wherein 1 pin of IC6 links to each other with 9 pin by the C1 shunt capacitance, and 9 pin ground connection link to each other by R7 between 1 pin of IC6 and 16 pin; 3 pin of IC6 are battery low pressure detection comparator input end, and inner threshold voltage is 614mV, and it is provided with battery low pressure by external divider resistance R5, R6 and detects level, the other end ground connection of R6, and the other end of R5 links to each other with Vin; 5 pin of IC6 are synchronous clock and PWM model selection input end, link to each other with 1 pin, connect high level; 6 pin of IC6 are LCD bias circuit Enable Pin, link to each other with 1 pin, and high level starts the LCD bias circuit, and the main circuit that rises must start earlier; 11 pin of IC6 are the Enable Pin of chip, and high level starts IC6, links to each other with 1 pin; 7 pin of IC6 are LCD bias polarity selecting side, link to each other with 14 pin and ground connection; 10 pin of IC6 are LCD booster circuit feedback input end, and itself and the indirect R2 of 8 pin at 10 pin and the indirect R1 of G point, regulate the output voltage that R1, R2 resistance can change Vout2; 2 pin of IC6 are main booster circuit feedback input end, and its outer meeting resistance R3 exports 5V voltage to 16 pin, and 2 pin of IC6 are simultaneously by R4 ground connection; 13 pin of IC6 meet C4 to 8 pin and ground connection; Be connected with C6 between 12 pin of IC6 and H point, and be connected with L2 between the I point; Be connected with L1 between the 15 pin master booster circuit internal power switch drain of IC6 and I point; Be connected with D1 between I point and the H point, be connected with D2 between H point and the G point; Be connected with C5 between G point and the ground; Vin links to each other with the I point, simultaneously by C3 ground connection; 16 pin of IC6 are that the output terminal of main booster circuit power supply links to each other with Vout1, and the Vout1 of IC6 is output as+5V voltage, and 16 pin are simultaneously by C2 ground connection; Vout2 links to each other with the G point, and the Vout2 of IC6 is output as-23V voltage; The input voltage vin of power circuit is+3V to select for use two joint 1.5V dry cells to provide;

V. reset circuit is that the chip IC 5 of MAX810 is formed by model; Wherein 1 pin of IC5 links to each other with Vout1, and 2 pin are received 9,16,9 pin of IC1, IC2, IC3,3 pin ground connection respectively; The MAX810 chip is a kind of microprocessor of simple function chip that resets, be used to monitor the supply voltage of microcontroller and other flogic systems, it can power on, provide reset signal to microcontroller under power down and the economize on electricity situation, when supply voltage is lower than default threshold voltage, this device can send reset signal up to supply voltage in a period of time return to again be higher than threshold voltage till, but MAX810 chip monitoring voltage is 5.0V, 3.3V, the power supply of 3V, its the minimum 140ms of being of the delay time that resets, has the effective RESET output of high level, the glitch of anti-power supply, still can produce effective reset signal when being low to moderate the 1.1V power supply, need not outside appurtenances, be applicable to the temperature range of-40～+ 105 degree.

Course of action of the present utility model is as follows:

1. IC3 scans keyboard by IC4 output line scan signals, when pressing, makes the column scan return signal become low level by high level as button (3), and signal is passed to IC3;

2. IC3 passes to the coding of the button of being pressed (3) P00～P07 mouth of IC1 by internal operation by data bus DB0～DB7;

3. IC1 calculates, organizes, processes processing to the data that receive, and the signal after handling is passed to display module IC2 by P10～P17 again, and IC2 demonstrates related data through processing such as computing processing back on display.

Principle of work of the present utility model is as follows:

32～34 pins of IC3 are by 10～15 pin output line scan signals of IC4; As button (3) when pressing, return 1,2,5,6 and 38,39 pins of low level signal to IC3, signal is by replying buffer buffers and trivial depositing, by interrupt pin IC1 being produced then interrupts, IC1 carries out Interrupt Process after receiving look-at-me, and IC3 is carried out read-write operation etc. by 16,17 pin, by ternary data bus 12～19 pin data are sent to 39～32 pin of IC1 then; IC1 handles the data that receive, and by 1～8 pin data is passed to IC2 then; Character according to data, the viewing area has text display characteristic and graphical display area, IC2 has 320 * 240 dot matrix, can show various figures and text message, the data of each unit all are considered to character code in the text display RAM district, SED1335 can manage the 64kB display random access memory, can manage built-in character generator simultaneously, extend out character generator CGRAM or outside CGRAM; The 64kB display random access memory can be divided into three kinds of display characteristic districts such as text display district, graphical display area and character viewing area; SED1335 uses this character code to determine the character first address, then corresponding character pattern data is sent out, to show 8 * 8 lattice blocks of this character on liquid crystal display; Graphical display area is used for graphics mode and shows that the data of each byte directly are sent in the district, the show state of a point on the level state decision display screen of each, and " 1 " is for showing that " 0 " is not for showing.

Panel construction when the utility model is used to move the self-editing fertilization compositions based on earth measurement calculation procedure of the applicant of the utility model patented claim as shown in Figure 2, it needs to use in 36 key positions of the utility model 34 altogether; This program is according to the balance fertilizing principle, button (3) on the housing (1) is divided into " crop species, the real product of preceding stubble, target output, soil fertility, meteorological condition, field pipe level, soil nutrient content, irrigation method, the soil texture, base chase after ratio, fertilizer formula, fertilizer variety, base manure are recommended, the recommendation of topdressing " totally 14 directly related buttons (3) content that belongs to four steps, and the mutual corresponding relation of forming between correlative factor that these buttons (3) are related and the rate of fertilizer application is compiled into multinomial variable function model and enters in the program; The content of these 14 buttons (3) is being represented each agronomy parameter index, embodying the level of difference between each factor, these factors are become quantification, as long as the quantizating index in a certain factor changes to some extent, just change to some extent accordingly of fertilizer practice and rate of fertilizer application so, thus can realize different output and rate of fertilizer application according to different factor conditions; Parameter index in this program is to be based upon on a large amount of practical basis, and these agronomy parameters are input in this software, just can accurately determine rate of fertilizer application; Simultaneously, also can be according to weather conditions, each crop yield and the field pipe level of each department, each province, by adjusting the partial parameters index of this software, input parameter enters in the singlechip chip, just can be suitable for the needs of each department fertilization compositions based on earth measurement and the continuous variation of new technology, make software parameter bring in constant renewal in purpose of upgrading thereby reach, so that this software is applicable to the needs of each department, each province agricultural modernization; This sequential operation is quick, easy and simple to handle, easily universal, is suitable for peasant and rural science and technology personnel and uses, and also can use for the fertile producer of middle-size and small-size special use exploitation fertilizer formula.

Because the inventive point of the utility model patented claim mainly is on the hardware device, and this hardware device is not to be used to the self-editing fertilization compositions based on earth measurement calculation procedure of applicant, so the applicant only discloses the process flow diagram of its self-editing fertilization compositions based on earth measurement calculation procedure in this case, as shown in Figure 3.

Claims (1)

1. hand held hardware device that can be used to move the fertilization compositions based on earth measurement calculation procedure, comprise the display screen (2) and the button (3) that are arranged on the housing (1), it is characterized in that it also includes operating voltage and is+5V, model is the singlechip chip IC1 of 89C55, model is LMBGA_032_49CK_ module I C2, model is 8279 chip IC 3, model is the coding chip IC4 of 74LS138, model is the chip IC 5 of MAX810, model is the chip IC 6 of MAX1677, resistance R 1=820K, R2=45K, R3=330K, R4=110K, R5=R6=I00K, R7=10 Ω, R8=R9=R10=R11=R12=R13=5.1K, slide rheostat R14=10K, capacitor C 1=C4=C6=C7=C8=0.1u, C9=C10=20pF, electrochemical capacitor C2=C3=100u, C5=4.7u, inductance L 1=L2=I0u, brilliant shake W1=12MHZ, diode D1=D2=BAT85, + 3V power input Vin ,+5V power output end Vout1 ,-23V power output end Vout2 and contact G, H, I; Above-mentioned device constitutes governor circuit, display circuit, keyboard input circuit, power circuit and reset circuit;

I. governor circuit is to be the singlechip chip IC1 of 89C55 by operating voltage for+5V, model, and capacitor C 7, C9, C10 and brilliant shake W1 form;

Wherein IC1+the 5V operating voltage provides by Vout1, C7 is arranged between Vout1 and the ground; Clock circuit adopts internal clock circuit, and the C9 and the C10 of crystal oscillator W1 and series connection mutually are arranged in parallel between 18,19 pin of IC1 the link ground connection of C9 and C10; 9 pin of IC1 link to each other with 2 pin of IC5;

II. display circuit is to be LMBGA_032_49CK_ module I C2 by model, and slide rheostat R14 forms;

The 1 pin ground connection of IC2 wherein, 2 pin link to each other with Vout1, and contrast adjustment voltage 3 pin link to each other with the sliding end of R14, and 17 pin link to each other with Vout2; Two stiff ends of R14 link to each other with 17 pin with 2 pin of IC2 respectively and regulate contrast voltage; 4 pin of IC2 are that data-signal is selected pin, link to each other with 22 pin of IC1, come 5,6 pin of the selection IC2 of control signal to link to each other with 16,17 pin of IC1 respectively by 22 pin of IC1; 7～14 pin of IC2 are ternary data bus DB0～DB7, are connected with 1～8 pin of IC1 respectively; 15 pin of IC2 are that the chip selection signal low level is effective, directly ground connection; Because what adopt is 8080 series monolithic chips, so 18 pin of IC2 connect low level, direct ground connection; 16 pin of IC2 are reset pin, link to each other with 2 pin of IC5;

III. the keyboard input circuit is to be 8279 chip IC 3 by model, and model is the coding chip IC4 of 74LS138, and resistance R 8～R13 and capacitor C 8 are formed;

The keyboard input circuit has used the keyboard input circuit of 6 * 6 totally 36 keys, and wherein 12～19 pin of IC3 are ternary according to bus, connect 39～32 pin of IC1 respectively; 4 pin of IC3 are that interrupt pin links to each other with outer interrupt pin 13 pin of IC1; Chip selection signal 22 pin of IC3 link to each other with 28 pin of IC1; Read-write gating signal 10,11 pin of IC3 link to each other with 17,16 pin of IC1 respectively; Link to each other with 21 pin of IC1 3 pin of IC3 of 21 pin of IC3 link to each other with 30 pin of IC1, and clock input signal CLK is provided by 30 pin of IC1; Link to each other with 2 pin of IC5 link to each other with 1,2,3 pin of IC4 respectively 1,2,5,6,38,39 pin of IC3 of 32,33,34 pin of IC3 that reset of 9 pin of IC3 are column signal incoming lines of keyboard matrix, and high level is effective, and it links to each other with Vout1 by R8～R13 respectively; 7,8 pin of IC3 need not, need connect high level, 36, the 37 pin ground connection of the IC3 that links to each other with Vout1; The operating voltage of IC3 is provided by Vout1, is connected to C8 between Vout1 and ground; 6 pin of IC4 link to each other with Vout1,4,5 pin ground connection, and 10～15 pin are output as the keyboard horizontal scanning line;

IV. power circuit is to be the chip IC 6 of MAX1677 by model, resistance R 1～R7, capacitor C 1, C4, C6, electrochemical capacitor C2, C3, C5, inductance L 1, L2, diode D1, D2 ,+3V power input Vin, + 5V power output end Vout1 ,-23V power output end Vout2 and contact G, H, I form;

Wherein 1 pin of IC6 links to each other with 9 pin by the C1 shunt capacitance, and 9 pin ground connection link to each other by R7 between 1 pin of IC6 and 16 pin; 3 pin of IC6 are battery low pressure detection comparator input end, inner threshold voltage is 614mV, it is provided with battery low pressure by external divider resistance R5, R6 and detects level, link to each other with Vin 5 pin of IC6 of the other end ground connection of R6, the other end of R5 are synchronous clock and PWM model selection input end, link to each other with 1 pin, 6 pin that meet high level IC6 are LCD bias circuit Enable Pin, 11 pin of IC6 of linking to each other with 1 pin are the Enable Pin of chip, and high level starts IC6, links to each other with 1 pin; 7 pin of IC6 are LCD bias polarity selecting side, link to each other with 14 pin and ground connection; 10 pin of IC6 are LCD booster circuit feedback input end, and itself and the indirect R2 of 8 pin at 10 pin and the indirect R1 of G point, regulate the output voltage that R1, R2 resistance can change Vout2; 2 pin of IC6 are main booster circuit feedback input end, and its outer meeting resistance R3 exports 5V voltage to 16 pin, and 2 pin of IC6 are simultaneously by R4 ground connection; 13 pin of IC6 meet C4 to 8 pin and ground connection; Be connected with C6 between 12 pin of IC6 and H point, and be connected with L2 between the I point; Be connected with L1 between the 15 pin master booster circuit internal power switch drain of IC6 and I point; Be connected with D1 between I point and the H point, be connected with D2 between H point and the G point; Be connected with C5 between G point and the ground; Vin links to each other with the I point, and 16 pin by C3 ground connection IC6 are that the output terminal of main booster circuit power supply links to each other with Vout1 simultaneously, and the Vout1 of IC6 is output as+5V voltage, and 16 pin are simultaneously by C2 ground connection; Vout2 links to each other with the G point, and the Vout2 of IC6 is output as-23V voltage;

V. reset circuit is that the chip IC 5 of MAX810 is formed by model; Wherein 1 pin of IC5 links to each other with Vout1, and 2 pin are received 9,16,9 pin of IC1, IC2, IC3,3 pin ground connection respectively.

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