JPS60239830A - Microprogram control device - Google Patents

Abstract

PURPOSE:To shorten a testing time sharply without increasing the number of program steps by forming an input signal to be used only at the time of a test and operating said signal at the time of the test. CONSTITUTION:To test a software timer, a test input T1 is set to the ''1'' level and a power ON P1 signal e.g. is inputted. At that time, the timer is actuated and a power ON sequence is executed, so that the operation of the timer can be checked. When the test input T1 is turned to the ''0'' level and the power ON signal P1 is inputted to test the operation sequence at the input of alarms A1- An e.g., all the timers are jumped and disabled, so that output signals B1-Bk are turned to the regulated output state, i.e. ON completion state, almost simultaneously with the signal P1. If an alarm signal A1 is inputte, the changing alarm OFF sequence of the output signals B1-Bk can be checked.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a microprogram control device, and particularly to testing of a microprocessor having a software timer function.

(Prior Art) Conventionally, in this type of microprogram control device, the first
Microprocessor 1 as shown in the figure.

program memory 2 and address latch circuit 3.

Input buffer drivers 41, 42 and output ports 51.
52. On the other hand, the logic flow is as shown in Fig. 2, in which the software timer section and the subsequent processing are executed in series.For example, as shown in Fig. 8, when input signal P1 is input, the timer is driven for time t1. After that, processing light 1 is executed and output signal B1 is output, and then the timer is set to time 1. After driving the timer for a time tk, the output signal B3 is output, and in the same manner, after driving the timer for a time tk, the output signal Bk is output.

Therefore, if the process shown in FIG. 2 is a power-on sequence, for example, the input signals A1 to An (for example, an alarm signal) in FIG. In such a case, it is necessary to set the ON completion state every time immediately before inputting 1 to An to the input signal. However, this initial setting (1,
+1. +...tk) time is required each time, so even if the test is automated, it will take at least (11+t2+...
...+tk) has the disadvantage that the inspection time cannot be shortened.

(Object of the Invention) The object of the present invention is to provide an input signal that is used only during inspection in addition to the original input signal, and to manipulate this signal during inspection to solve the above drawbacks and greatly increase the number of program steps. An object of the present invention is to provide a microprogram control device that can significantly shorten inspection time without any problems.

(Structure of the Invention) A microprogram control device according to the present invention includes a microprocessor and an input sofa driver.

It is equipped with a program memory, an address launch circuit, and an output port.

The microprocessor has a test input terminal connected to a power supply through an external resistor.

The input buffer driver is for handling input signals to the microprocessor.

The program memory is for storing a microprogram having a software timer function.

The address latch circuit is for holding the address of the program memo.

The output port is used to hold output signals for a certain period of time, which are output sequentially with a delay time determined by a software timer.

In the present invention, by grounding the test input terminal connected from the power supply through the external resistor, the delay in the output signal can be eliminated by skipping the subroutine with the software timer function in the microprogram. do. Additionally, by opening the test input terminal, a subroutine with software timer function in the microprogram is executed to give a predetermined delay time to the output signal.

(Example) Next, the present invention will be explained in detail with reference to the drawings.

In FIG. 4 showing an embodiment of the present invention, a microprogram control device according to the present invention includes a microprocessor 11 equipped with a test input terminal T1 used for jumping a software timer, and a microprocessor 11 for storing a microprogram. Program memory 2, program address address launch circuit 3, and input signal Ps=Pm+A
Input for inputting t to An to the microprocessor 11/(・Sofa driver 41, 42 and output signals B1 to B
1 (output ports for outputting) 51 and 52. Also, 6 is a resistor.

Next, the operation of the microprogram control device according to the present invention will be explained using the flowchart of FIG. 5 and the time charts of FIGS. 8 and 6.

-4f, software timer (t]ejz+・ in FIG. 5
...tk), set the test input T1 to the turtle 1# level and input the signal Ps (for example, a power-on signal). At this time, the timer (tl.

t2, 11@@tk) operates and the sequence shown in Figure 3 (
For example, the power-on sequence) is executed, and the operation of the timer (t1+j!+...tk) shown in FIG. 5 can be confirmed.

Next, in order to inspect the operation sequence when the signal Al-A n (e.g. alarm signal) is input, the test input T1 is set to %ON level and the power-on signal P1 is input, as shown in Fig. 5. As shown in the flowchart, the timers (t1y'2+...tk) are all jumped and do not work, so the output signals B, -Bk as shown in FIG.
is in a fixed output state (for example, on-completed state) at the same time as the power-on signal P1. Therefore, alarm signal A
If you input I, you can check the changes in the output signals B1 to T31 (for example, the alarm off sequence) τ11 to τ+k.

Furthermore, in order to input another alarm signal Ai (i=2...n) and check the change in the output signals B1-Bk, the output signal must be set to the ON completion status of the upper dome P? It is necessary to Since the test input Tl is already at the [%Q# level, the specified output state is immediately reached when the power-on Itami P1 is input. Subsequently, if the alarm signal A1 is input, the changes (τ11 to fik) of the output signals B1 to Bl (with respect to the input signal Ai) (
i=2m...n), and only the part you want to check can be checked.

In addition, since the test input TI is open during normal operation, the software timer will always be executed even if the level is %17.

(Effects of the Invention) As explained above, the present invention utilizes the test input terminal provided in the microprocessor to jump the software timer that passes when setting the initial state, thereby determining the number of program steps. This has the effect of significantly shortening the inspection time without increasing the number of vertices.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a microprogram control device according to the prior art. FIG. 2 is a flowchart showing the operation of a microprogram control device according to the prior art. FIG. 8 is a time chart of the logical flow of the flowchart shown in FIG. P2. FIG. 4 is a block diagram showing an embodiment of a microprogram control device according to the present invention. FIG. 5 is a flowchart showing the operation of the microprogram control device according to the present invention. FIG. 6 is a time chart of the logical flow of the flowchart shown in FIG. 1.11Φ@e microprocessor 2, --- Program memory 3, e, address latch circuit 41.42... Buffer dryer/ku 51.52... Output port controller...・Resistor Figure 1 - Figure 2 Figure 3 1゛f' Figure 4 Figure 5

Claims (1)

[Claims] A microprocessor equipped with a test input terminal connected from a power supply via an external resistor, an input buffer driver for handling input signals to the microprocessor, and a microprogram having a software timer function are stored. a blank program memory; a blank address latch circuit for holding the address of the program memory;
and an output port for holding output signals sequentially output for a certain period of time according to a delay time determined by the software timer, and the test input terminal is connected to the power supply via an external resistor. By grounding, the subroutine having the software timer function in the i microprogram is skipped and the delay in the output signal is eliminated, and by opening the test input terminal, the software timer in the microprogram is A microprogram control device characterized in that it is configured to execute a subroutine having a function to give a predetermined delay time to the output signal.