JPH04130924A - Microprogram control system for sequencer - Google Patents

Abstract

PURPOSE:To attain a high-speed processing and to prevent a control code storage device from expanded by applying an address necessary for the transition of program logic to the control code storage device by a register. CONSTITUTION:A microprogram for controlling a hardware function device 24 is stored in the control code storage device 21. A counter 22 applies an address necessary for executing a certain program logic to the device 21 through a bus 28 while matching with the operation period of the device 24. The microprogram for executing one completed processing by controlling plural devices 24 is constituted of plural program logic elements each of which controls one device 24, and in the case of executing transition among the program logic elements as the processing of the microprogram, the status permission bit of a microcode 26A is set up, the status display signal of the device 24 is transmitted to the counter 22 and an address register 29 and the address of the program logic to be transmitted is selected and set up.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a microprogram control system for a sequencer that controls a plurality of hardware functional devices using a microprogram.

(Prior Art) Fig. 3 shows an example of the configuration of a microprogram of this type of sequencer, in which other hardware functional devices are controlled by the state of the hardware functional device controlled by the microcode. (condition φ jump 12), or a sequence in which one hardware functional device is controlled and then another hardware functional device is controlled (non-condition jump 13).
), etc.

In controlling a microprogram with such a configuration,
Conventionally, when transitioning from the program logic 11 that controls the first l\-ware functional device to the program logic that controls the next l\-ware functional device, the address for the beginning of the transition destination program logic is stored in the microcode. A control method was adopted in which the control code was given to the storage device using the field.

FIG. 4 shows an overview of the system configuration based on this conventional microprogram control method.

In FIG. 4, 21 is a control code storage device that stores a microprogram for controlling the hardware function device.

22 is a counter that generates an address for the control code storage device 21.

Reference numeral 23 denotes a control code controller that latches the microcode output from the control code storage device 21.

Reference numeral 24 represents a hardware functional device controlled by microcode.

25 is a status permission bit decoder that controls transition in the microcode.

26 is a microcode, 27 is a control code, 28
is the control code address bus.

Here, the field of the microcode 26 used to perform the transition of the program logic as described above is a field for specifying an address for the transition destination program logic (Jump destination address) and the address is given to the control code storage device 21. Fields that control behavior (
status permission bit).

In this way, according to the conventional method that uses the microcode 26 that performs only the transition operation when performing logic transition between program logics that control the hardware functional device 24, the actual hardware functional device 24 is interrupted by processing for the microcode 26 for controlling the transition between program logics, which causes a problem in that the processing speed of the hardware function device 24 becomes slow.

In order to solve this problem, a method as shown in FIG. 5 has been proposed.

In other words, in this conventional method, microcode 2
6a includes both a field for controlling the hardware function device 24 and a field for transitioning program logic (
Decoders 25a and 25b correspond to these two fields.
The system was designed to speed up the processing by simultaneously and continuously processing the program logic transition and the control processing operation of the hardware function device 24.

However, in the case of this conventional method, the microcode 2
6a becomes longer, and this microcode 26a inevitably becomes longer.
The control code storage device 21 for storing the information had to be made larger as well.

(Problems to be Solved by the Invention) As described above, in the conventional sequencer microprogram control method described above, when transitions are made between program logics that control the /X-ware functional device, the execution and transition of the logic transitions When the above instructions are given by microcode, there is a problem in that the logic transition control is performed while interrupting other controls, resulting in a reduction in the control processing speed of the hardware functional device.

Furthermore, in order to improve the control processing speed, if the microcode is provided with both a field for instructing logic transitions and a field for controlling the hardware function device, the microcode length becomes longer, and the control code storage device that stores this becomes longer. There was a problem in that it became larger.

The present invention eliminates this problem and enables faster processing by continuously controlling hardware functional devices during logic transition control, and by shortening the length of the microcode used for this control. It is an object of the present invention to provide a microprogram control method for a sequencer that can prevent the control code storage device from increasing in size.

[Structure of the invention]

(Means for Solving the Problems) The present invention is directed to a microprogram in which program logic for individual control of a plurality of hardware functional devices is stored in a control code storage device as a series of meaningful control information. In a microprogram control system for a sequencer, a plurality of address registers for providing transition addresses necessary for transition control of the program logic to the control code storage device;
At the initial stage of operation of the sequencer, the microprogram is used to load the corresponding address register, and when transitioning to other program logic, the microprogram and the hardware load the address register loaded with the transition address necessary for the control. The present invention is characterized by comprising means for selecting a transition address based on a state display signal of a wear function device and outputting a transition address therein to the control code storage device.

(Function) According to the present invention, addresses necessary for transitioning program logic are given to the control code storage device by registers without using microcode.

At this time, first, the address for the beginning of the program logic is loaded into the register by the initial operation of the microprogram.

After that, in the program logic that actually controls the hardware functional device, when the processing within that logic is finished and the transition is made to the next logic, the logic transition contained therein is executed in the final microcode of the logic. The control field to be performed is used to instruct transition operations, determine state indication signals of hardware functional devices, and select registers.

Therefore, even during logic transition control, there is no need to interrupt the control processing operations of a series of hardware functional devices, and high-speed processing can be achieved.

Furthermore, since the microcode field is not used to indicate the address value to the program logic, the length of the microcode can be shortened, and the size of the device that stores it can also be kept small.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows an outline of a system configuration using a microprogram control method for a sequencer according to the present invention.

In this method of the present invention, an address register 29 is provided to provide an address necessary for transitioning program logic.

Further, the fields of the microcode 26A are comprised of a field for controlling a hardware functional device (hardware control bit) and a field for transitioning program logic (status permission bit).

In order to decode each field of this microcode 26A, decoders 25A and 25B are provided corresponding to each field.

The rest of the configuration is the same as the conventional system, including a control code storage device 21 that stores a microprogram, a counter 22 that generates an address for the control code storage device 21, and a microprogram output from the control code storage device 21. Control code latch section 23 that latches the code 26A
, a hardware function device 24 controlled by a microcod 26A is provided.

The operation of this microprogram control method will be explained below.

First, a microprogram for controlling the hardware function device 24 is stored in the control code storage device 21 .

The counter 22 provides an address for executing a certain program logic to the control code storage device 21 through the control code address bus 28 in accordance with the operating cycle of the hardware function device 24 .

The control code storage device 21 outputs the pre-stored microcode 26A to the control code latch section 23 via the control code bus 27 according to the given address value.

The microcode 26A latched by the control code latch unit 23 is decoded by decoders 25A and 25B provided for each field of the microcode 26A.
Used to control each function.

In normal control processing of the hardware functional device 24, the status permission bit in the microcode 26A is not set, and only the hardware functional device 24 is controlled by setting only the hardware control bit.

On the other hand, a microprogram that controls multiple hardware functional devices 24 to perform one completed process is configured using multiple program logics that control one hardware functional device 24, and as the process. When performing a transition between program logics, set the status permission bit of the microcode 26A, transmit the status display signal of the hardware function device 24 to the counter 22 and address register 29, and select the address of the program logic to which the transition will occur. and set.

Since the microcode 26A has a status permission bit that performs state transition in this way and a control bit that controls the hardware functional device 24, the control operation of the hardware functional device 24 is interrupted even when a transition operation is instructed. You will no longer have to do it.

Moreover, since the address for the transition operation is set from the address register 29, the field for specifying the address can be deleted from the microcode, thereby shortening the length of the microcode.

Next, FIG. 2 shows a specific example of the configuration of a system to which this microprogram control method is applied.

In FIG. 2, 30 is a sequencer according to the method of the present invention shown in FIG. 1, and 31 is a control code storage device in which a microprogram is stored.

32 is a hardware functional device controlled by a microprogram, and in this example there are multiple units A to F.

33 is a FIFO (
ffrst-fn f'frst-out (first-in, first-out) circuit, and 35 is a data bus for multiplexing data of the terminal 34 and parameters of the hardware function devices 32A-F.

The hardware in Figure 2 is the hardware function module W32A.
- parameters of F and data of terminal 34 to data bus 35
The multiplexed data is multiplexed by the multiplexed data, and the multiplexed data is output to the transmission line.

The sequencer 30 has program logic that controls each of the hardware function devices 32A-F, and selects parameters according to the multiplexing speed according to the value of the status display signal of each hardware function device 32A-F.

If we consider a case where the parameters of the hardware functional device 32A are multiplexed and then the parameters of the hardware functional device 32B are multiplexed, the sequencer 3 according to the method of the present invention
In the microprogram control method of No. 0, the control of the hardware function device 32 and the transition operation of the program logic can be performed simultaneously.

Therefore, by setting the status permission bit in the final microcode of the program logic that multiplexes the parameters of the hardware functional device 32A, the final parameter multiplexing of the hardware functional device 32A and the next hardware functional device 32B are performed. This can be done at the same time as setting the start address of the program logic that controls the data, thereby improving the multiplexing speed.

In this way, when the multiplexing speed is improved, the allowable speed of the supported terminal speeds can also be improved.

Furthermore, in the present invention, the address given to the control code storage device 31 is not given from the microcode but from a preset register to shorten the microcode length. When the functional devices 32A to 32F are manufactured as a gate array, the number of pins of the gate array can also be reduced.

〔Effect of the invention〕

As explained above, according to the microprogram control method for a sequencer of the present invention, in the process of controlling a plurality of hardware functional devices by a microprogram,
After executing the program logic that controls one of the hardware functional devices, when the process transitions to the program logic that controls the other hardware functional device using the status display signal of the hardware functional device as an index,
The address for the beginning of each program logic is loaded into the address register at the beginning of sequencer operation, and the final microcode of the program logic before transition manipulates the transition control field while performing the processing operations of the hardware functional unit. Since the corresponding address is given from the address register to the control code storage device, there is no need to interrupt other controls when controlling the transition of program logic, and it is possible to perform high-speed processing control such as parameter multiplexing of various /1-ware function devices. This has the excellent advantage that it is possible to reduce the size of the microcode, and because the length of the microcode can be shortened, the size of the device that stores it can also be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a system configuration using the microprogram control method for a sequencer according to the present invention, FIG. 2 is a diagram showing the configuration of a system using the microprogram control method for a sequencer according to the present invention, and FIG. is a conceptual diagram showing the general configuration of the sequencer microprogram, and the fourth
This figure shows an example of a system configuration based on a conventional microprogram control method, and FIG. 5 is a diagram showing another example of the configuration of this type of conventional system. DESCRIPTION OF SYMBOLS 11... Program logic, 12... Condition jump, 13... Non-condition jump, 21... Control code storage device, 22... Counter, 23... Control code latch unit, 24... ...Hardware functional device, 25A...Status permission bit code decoder, 25B...Control code decoder,
26A... Microcode, 27... Control code bus, 28... Control code address bus, 29... Address register, 30... Sequencer, 31... Control code storage device, 32A-F.・・Various hardware functional devices, 33-F I F O (f'1rst-in
first-out) circuit, 34...terminal, 35.
...Data bus (Figure 1) that multiplexes the parameters of the hardware functional devices 32A to 32F and the data of PIF033

Claims (2)

[Claims] (1) In a microprogram control method for a sequencer that targets a microprogram in which program logic for individual control of a plurality of hardware functional devices is stored as a series of meaningful control information in a control code storage device, the program a plurality of address registers for providing transition addresses necessary for logic transition control to the control code storage device; and means for loading the transition addresses into corresponding address registers using the microprogram at the initial stage of operation of the sequencer. , When transitioning to another program logic, an address register loaded with a transition address necessary for its control is selected based on the status display signal of the microprogram and hardware functional device, and the transition address therein is selected as the transition address. 1. A microprogram control method for a sequencer, comprising means for outputting the control code to a control code storage device. (2) In the state display signal, both signals for transition control of the program logic and signals for controlling the operation of the hardware functional device are set, and appropriate transitions are made from the address register by the transition control of the program logic. Microprogram control of a sequencer according to claim 1, characterized in that the process of selecting an address and applying it to the control code storage device and the control process of the hardware functional device are enabled in parallel. method.