BG61355B1 - Cash register - Google Patents

Abstract

The cash register is used in distributive trade. It has simplified structure and improved reliability. The device consists of a keytboard (1) with a lock (2), indication unit (3), sound emitter (4), clock (5) and microprocessor system (6) having standard-conncted to it: a printer (7) and fiscal memory (8). The outputs of the lock (2) are directly coupled to a five-bit information output of the keyboard (1) connected to a five-bit port of the microprocessor system (6) the three-bit port of which is connected to the information input of a decoder (9). The control input of the decoder (9) is coupled to an one-bit port of the microprocessor system (6). The eight-bit output of the decoder (9) is connected to respective eight-bit inputs of the keyboard (1) of the indication unit (3) the information input across buffer (10) of which is coupled to the output "Data" bus of the microprocessor system (6). A control output of clock (5) is connected to the start-up input of generator (11) the output of which is coupled to the control input of the sound emitter (4).

Description

TECHNICAL FIELD

The invention relates to a cash register which is used in commerce.

BACKGROUND OF THE INVENTION

A cash register is known, consisting of a microprocessor system with a typical printer, fiscal memory and a real-time clock. The address bar of the microprocessor system is connected via a nine-diode buffer to the control input of a keyboard containing a lock, the outputs of which are connected to five positions in the keyboard matrix. The eight-bit information output of the keyboard via a buffer is connected to the input data bus of the microprocessor system. The output data bus of the latter through the position buffer and the symbol buffer is connected to the control inputs of the display block. A sound transmitter is connected to the single-bit output port of the microprocessor system / 1 /.

A disadvantage of the known cash register is its increased complexity and low reliability due to the presence of multiple elements, as well as diodes connected directly to the address bus of the microprocessor system.

It is an object of the invention to provide a cash register with increased reliability and simplified construction.

SUMMARY OF THE INVENTION

The task is solved with a cash register consisting of a keypad with a lock, an indication block, a sound emitter, a clock and a microprocessor system with a printer and fiscal memory connected to it by type. The outputs of the lock are connected directly to a five-bit keyboard information output connected to a five-bit input port of the microprocessor system 6, a three-bit output port of which is connected to the information input of a decoder whose control input is connected to a single-bit output port of the microprocessor system 6. The eight-bit decoder output is connected to the corresponding eight-bit inputs of the keyboard and the indicator block whose information input through a buffer is connected to its microprocessor output data bus shame. The clock control output is connected to the generator start input whose output is connected to the sound emitter control input.

The advantage of the cash register is that it has a simplified construction with increased reliability.

DESCRIPTION OF THE FIGURES Attached

The invention is illustrated in more detail by an exemplary embodiment shown in the accompanying figure, which is a block diagram of a cash register.

EXAMPLE FOR THE IMPLEMENTATION OF THE INVENTION

The cash register of the figure consists of a keypad 1 with a lock 2, an indication block 3, a sound emitter 4, a clock 5 and a microprocessor system 6 with a printer 7 and fiscal memory type 8 connected thereto. The outputs of the lock 2 are connected directly to a five-bit information keyboard output 1 connected to a five-bit input port of the microprocessor system 6, a three-bit output port of which is connected to the information input of a decoder 9 whose control input is connected to a single-bit output port of the microprocessor system 6. the decoder unit 9 is connected to the corresponding eight-bit inputs of the keyboard 1 and the indicator block 3, whose information input through a buffer 10 is connected to the output bus "data" of the microprocessor system 6. The control output of the clock 5 is connected to the starting input of the generator 11, the output of which is connected to the control input of the sound emitter 4.

SUMMARY OF THE INVENTION

The effect of the cash register is as follows.

When operating the cash register, the operating mode is selected by positioning the lock 2 and submitting the corresponding code from it to the microprocessor system 6. The typed commands from keyboard 1 are fed into and interpreted by the microprocessor system 6. It simultaneously sends, through the buffer 10, commands to control the display unit 3, which simultaneously receives, through the decoder 9, scan signals to ensure that the information transmitted is displayed simultaneously in all digits on its display. The same signals are provided for scanning the matrix into the keyboard 1. The microprocessor system tribit output port provides the required binary code for the scanner 9, and the single-bit output port sends a signal to the control input of the decoder 9, which enables the code to be read later. of the lock 2. The microprocessor configuration 6 controls the printer 7, the fiscal memory 8, and the clock by type 5. The latter in turn sends a control signal to the generator 11 when received from a microprocessor. otsesornata 6 command system for its inclusion or exclusion. Through its signal, generator 11 activates or stops the loudspeaker 4.

Claims (1)

Claims A cash register consisting of a keypad with lock, indication unit, sound transmitter, clock and microprocessor system with a printer connected to it and fiscal memory, characterized in that the outputs of the lock (2) are connected directly to a five-bit information output of the keyboard (1) connected to a five-bit input port of the microprocessor system (6), a three-bit output port of which is connected to the information input of a decoder (9) whose control input is connected to a single-bit output port of the microprocessor system 10 (6), as the eight-bit output of the decoder (9) is connected to the corresponding eight-bit inputs of the keyboard (1) and the indicator block (3), whose information input through a buffer (10) is connected to the output data bus 15 of the microprocessor system (6), as the clock control output (5) is connected to the starting input of a generator (11) whose output is connected to the control input of the sound emitter (4).