JPH025141A - Microcomputer - Google Patents

Abstract

PURPOSE:To reduce the number of manhour of software and to speed up processing by generating a vector interruption signal by a coincidence signal based upon hardware comparing operation between data values inputted from plural ports and a previously set data value. CONSTITUTION:A sampling circuit 1 samples data inputted from the ports for a fixed time, an input data storing register 2 is an 8-bit register to which sampled data are transferred and a data setting register 3 is a programmable 8-bit register. A comparator 4 compares the contents of the register 2 with that of the register 3, and when both the data coincide with each other, outputs a coincidence signal 5 and generates a vector interruption request signal 6. Consequently, the branch of program processing based upon the input data values from the ports can be executed without using software, so that the man hour of the software can be reduced and rapid processing can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a microcomputer having a vector interrupt function.

[Conventional technology]

In conventional microcomputers, all branching of program processing based on port data input values is performed by conveyor processing using software.

[Problem to be solved by the invention]

The conventional microcomputers mentioned above generate vectored interrupts based on the data values of multiple ports.As there is no hardware, all input data values are sensed and processed using software, interrupt processing, etc. This requires selecting and executing the software, which not only burdens the software man-hours but also takes time. In addition, when using a port for key human power, it is necessary to always run the key human power/sense program. There is a drawback that it must be done.

[Means to solve the problem]

The microcomputer of the present invention has a function of conveying data values input from a plurality of ports and data values that can be set in advance using hardware, and generating a vector interrupt request signal based on a matching signal. I'm doing it.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

Sampling circuit: 1 samples data input from the port for a certain period of time, and input data storage register:
2 is an 8-bit signal to which the data after sampling is transferred.
Register, data setting register: 3 is a programmable 8-bit register, conveyor circuit: 4 performs conveyor operation on the contents of input data storage register: 2 and data setting register: 3, and when the respective data match. , a match signal: 5 is output, and a vector interrupt request signal 26 is also generated.

〔Effect of the invention〕

As explained above, the present invention generates a vector interrupt signal based on a match signal generated by a hardware conveyor operation between data values input from a plurality of ports and data values that can be set in advance. Branching of program processing based on data values is now possible without any software intervention, reducing software man-hours and achieving high-speed processing.
This has the effect of making it possible to sense external data from the port even in mode.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention. 1... Sampling circuit, 2... Input data storage register, 3... Data setting register, 4... Conveyor circuit, 5... Match signal, 6...Vector interrupt request signal. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] It has a comparison circuit that compares external data values input from a plurality of ports with internal data values that can be set by a program, and the external data values input from the plurality of ports and the external data values input from the plurality of ports are output from the comparison circuit. A microcomputer, characterized in that a vector interrupt request signal is generated based on a match signal with an internal data value that can be set by a program.