JPH05241815A - Signal processor for microprocessor control - Google Patents

Abstract

PURPOSE:To change a control program in an operating state while a power source is applied by providing a read only memory board or the like which can be attached and detached while the power source is applied. CONSTITUTION:ROM board 109 can be attached and detached while the power source is applied to a signal processor 101, and turned into the operating state. Then, at the time of changing the content of the control program in the operating state, the ROM board 109 is exchanged for the ROM board 109 after a content change. Then, the leading address and the number of change words of the control program to be changed are set by a data input key 111, and an interruption is operated to a microprocessor 102 by a start key 112. The microprocessor 102 reads the leading address and the number of the change words of the control program through a bus interface circuit 110, reads data by each word through a bus interface circuit 108 from the ROM board 109, and reloads the content of an RAM 105 of a pertinent address.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing device for controlling a plurality of signal processing circuits by microprocessor control.

[0002]

2. Description of the Related Art A conventional signal processing apparatus includes a microprocessor bus 203, a microprocessor 202, a read only memory (ROM) 204, a random access memory (RAM) 205, and a signal processing circuit 2 as shown in FIG.
07-1 to 207-n and a bus interface circuit 20 for interfacing with the host central processing unit 208
6 was connected.

[0003]

In the conventional signal processing apparatus 201, the ROM 204 has a signal processing circuit 207-
A control program for controlling signals 1 to 207-n and exchanging signal information with the host central processing unit 208 is stored.

When the control program of the ROM 204 is changed in order to add a function to the signal processing device 201 or as a countermeasure for a defect, the power is turned off once and the ROM 204 is replaced.
It is necessary to turn on the power again and start it up, and the terminals connected to the plurality of signal processing circuits 207-1 to 207-n cannot be used temporarily.

When the terminal is always used online, there has been a problem that the ROM 204 must be replaced after obtaining the consent of all the terminal users and adjusting the schedule.

An object of the present invention is to provide a signal processing device capable of changing a control program in an operating state while the power is on.

[0007]

In order to achieve the above object, a microprocessor-controlled signal processing device according to the present invention is connected to a central processing unit and controls a plurality of signal processing circuits by a microprocessor. In, the read-only memory board (ROM board) that can be inserted and removed into the data bus of the microprocessor while the power of the signal processing device is turned on, the terminal for inputting the data information to the microprocessor, and the data information A terminal for activating an input to the microprocessor.

[0008]

The read-only memory board (ROM board) that can be inserted and removed while the power is on is exchanged, data information is input to the microprocessor, and the microprocessor is activated by the data information.

[0009]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, a microprocessor bus 1
03, a microprocessor 102, a read only memory (ROM) 104, a random access memory (RA
M) 105, the signal processing circuits 107-1 to 107-n, the bus interface circuit 106 for interfacing with the host central processing unit 113, and the read-only memory board 10 via the bus interface circuit 108.
9. The data input key 111 and the activation key 112 are connected via the bus interface circuit 110.

The ROM board 109 controls the signal processing device circuits 107-1 to 107-n and controls the upper central processing device 113.
And a control program for transmitting and receiving the signal information are stored in the ROM 104. A program to be transferred to the RAM 105 via the circuit 108 is stored.

Therefore, after the initialization is completed, the microprocessor 102 operates according to the control program transferred to the RAM 105. The ROM board 109 can be inserted and removed while the signal processing device 101 is powered on and is operating.

In the signal processing apparatus 101, when the content of the control program is changed in the operating state, the ROM board 109 after the content change is first exchanged. Next, the start address and the number of changed words of the control program to be changed are set by the data input key 111, and the microprocessor 102 is interrupted by the start key 112.

The microprocessor 102 reads the start address and the number of changed words of the control program via the bus interface circuit 110, and then reads the ROM board 10.
9 through the bus interface circuit 108 to read the data word by word, and the RAM 10 of the corresponding address
Rewrite the contents of 5.

When this process is completed, RAM 105 and R
Similarly, the content of the control program of the OM board 109 is changed while the signal processing device 101 is operating.

[0016]

As described above, according to the present invention, the control program can be changed in the operating state while the power of the signal processing device is turned on, and all the user terminals connected to the plurality of signal processing circuits are constantly operated. Even if it operates online, it has an effect that the control program can be easily changed without any trouble to the terminal user.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a conventional device.

[Explanation of symbols]

 101 Signal Processor 102 Microprocessor 103 Microprocessor Bus 104 Read Only Memory 105 Random Access Memory 106 Bus Interface Circuit 107-1 to n Signal Processing Circuit 108 Bus Interface Circuit 109 Removable Read Only Memory Board 110 Bus Interface Circuit 111 Data input key 112 Activation key 113 Central processing unit 201 Signal processing device 202 Microprocessor 203 Microprocessor bus 204 Read only memory 205 Random access memory 206 Bus interface circuit 207-1 to n Signal processing device 208 Central processing unit

Claims (1)

[Claims] 1. A signal processing device, which is connected to a central processing unit and controls a plurality of signal processing circuits by a microprocessor, is insertable into and removable from a data bus of the microprocessor while the power of the signal processing device is turned on. A microprocessor-controlled signal processing device having a read-only memory board (ROM board), a terminal for inputting data information to a microprocessor, and a terminal for activating the input of the data information to the microprocessor.