JPS62232057A - Pseudo dma system - Google Patents

Pseudo dma system

Info

Publication number
JPS62232057A
JPS62232057A JP61074352A JP7435286A JPS62232057A JP S62232057 A JPS62232057 A JP S62232057A JP 61074352 A JP61074352 A JP 61074352A JP 7435286 A JP7435286 A JP 7435286A JP S62232057 A JPS62232057 A JP S62232057A
Authority
JP
Japan
Prior art keywords
line
circuit
data
lsi
common
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP61074352A
Other languages
Japanese (ja)
Other versions
JPH0471224B2 (en
Inventor
Makoto Ebihara
海老原 真
Tsutomu Komatsubara
小松原 勉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP61074352A priority Critical patent/JPS62232057A/en
Publication of JPS62232057A publication Critical patent/JPS62232057A/en
Publication of JPH0471224B2 publication Critical patent/JPH0471224B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14Handling requests for interconnection or transfer
    • G06F13/20Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/28Handling requests for interconnection or transfer for access to input/output bus using burst mode transfer, e.g. direct memory access DMA, cycle steal

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Bus Control (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To eliminate futile circuits and improve throughput of a micro-program by substituting DMA transferring function between a circuit controlling LSI and a memory with a micro-program, and controlling data transfer indirectly. CONSTITUTION:A circuit controlling section 5 constitutes a means that controls data transfer between a circuit controlling LSI and a memory directly at every step of a micro-program of a common controlling section, and an information selector circuit 6, a circuit selector circuit 7 and a scan circuit 8 constitute a means that makes the common controlling section read various request signals from the circuit controlling LSI directly. Thereby, the circuit controlling LSI is set to a DMA (direct memory access) mode, and reading or writing of data to the circuit controlling LSI is executed. That is, the step of the micro-program of the common controlling section is advanced by a request signal at the time of received data in the circuit controlling LSI are assembled at the time of receiving, and by a request signal of data sent to a circuit at the time of transmission, and data transfer of each specified unit is performed.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、自動交換磯の付帯系に使用する通信制御装置
におけるデータ転送方式の改良に関するbのである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a data transfer system in a communication control device used in an auxiliary system of an automatic exchange system.

(従来の技術) 第2図は従来のこの種の方式を示すもので、図中、1は
共通制御部、2はメモリ、3は共通バス、4−1〜4−
mは回線ユニット装置である。複数の回線ユニット装置
4−1〜4− mは、それぞれ回線制御LSI41−1
〜41−mを有し、各回線毎に対応して設けられている
。また、共通制御部1はマイクロ・プログラムを内蔵し
、共通バス3を介してメモリ2および回線ユニット装@
4−1〜4−mに接続されている。
(Prior Art) Fig. 2 shows a conventional system of this type, in which 1 is a common control unit, 2 is a memory, 3 is a common bus, 4-1 to 4-
m is a line unit device. Each of the plurality of line unit devices 4-1 to 4-m is a line control LSI 41-1.
41-m, and are provided corresponding to each line. In addition, the common control unit 1 has a built-in micro program, and communicates with the memory 2 and the line unit equipment via the common bus 3.
4-1 to 4-m.

回線制御IIL S I 41−1〜41−mG;t、
共通制6t1 部1からの動作指示を受けて、指示され
たデータを共通バス3を介して共通制御部1より受取り
、回線側に順次送出し、また、回線側からのデータを組
立てて、共通制御部1に送出する如くなっている。
Line control IIL S I 41-1 to 41-mG;t,
Common system 6t1 Upon receiving an operation instruction from section 1, receives the instructed data from common control section 1 via common bus 3, sends it sequentially to the line side, assembles the data from the line side, and sends it to the common control section 1. The data is sent to the control unit 1.

前記共通制御部1と回線ユニット装置4−1〜4−mの
回線制御ll L S I 41−1〜41−mとの間
のデータ転送形式には、プログラム・モードと、ダイレ
クトメモリアクセス・モード(以下、DMAモードと称
す。)の2つがある。
Data transfer formats between the common control unit 1 and the line control units 41-1 to 41-m of the line unit devices 4-1 to 4-m include a program mode and a direct memory access mode. (hereinafter referred to as DMA mode).

プログラム・モードとは、共通制御部1より回線制御L
SI41−1〜41−m側にデータを送る場合は、共通
制御部1のマイクロ・プログラムによりメモリ2からデ
ータを読出し、該データを指定づる回線制御LSIに書
込むために該回線制御LSI内のステータス・レジスタ
を読出し、書込み要求又は書込許可であるかを判定し、
書込動作が可能であれば該データを回線制御LSIの書
込み回線側に送出させ、また、共通制御部1にて回線制
御1LS 141−1〜41−m側(7)データtrH
取ルjQ合は、共通制御部1のマイクロ・プログラムに
より該回線側tllLs I内のステータス・レジスタ
を読取り、読取り要求又は読取り許可であるかを判定し
、読取り動作が可能であれば、回線制御LSIで組立て
られた回線側の受信データを読取り、メモリ2内の回線
毎に対応したエリアに書込むという、共通制御部1のマ
イクロ・ブ[]ダラムがデータ1バイトの転送毎に介在
するような転送形式%式% また、DMAモードとは、回線制御LSI41−1〜4
1−mとメモリ2との間にダイレクトメモリアクセスコ
ントローラ(以下、DMA制御回路と称す。)を設け、
該D M A fIII 6i1回路が共通制御部1か
ら転送データの先頭アドレスおよび終了アドレス又は転
送バイト数の指示を受け、回線制御LSIが送信側であ
れば、該回線制御LSIの送信要求端子に送信要求信号
が出力されることにより、メモリ2の前記指定された先
頭アドレスより順次アドレスをr+1.、lながら読出
し、回線制御LSIに該データを;追込み、また、回線
制御Llが受信側であれば、該回線制御LSIの受信完
了表示端子に受信完了表示信号(又は読取要求信号)が
出力されることにより、メモリ2の前記指定された先頭
アドレスより順次r+1.1ながら、該回線制御1LS
Iより読出した受信データを該当アドレスに出込むとい
う、マイクロ・プログラムでDMA制御回路に転送デー
タの先頭アドレスと終了アドレス又は転送バイト数を指
示ザるのみでデータ転送を行なうような転送形式のこと
をいう。
Program mode means line control L from the common control unit 1.
When sending data to the SI41-1 to SI41-m side, the microprogram of the common control unit 1 reads the data from the memory 2, and writes the data to the designated line control LSI. Reads the status register and determines whether it is a write request or write permission,
If the write operation is possible, the data is sent to the write line side of the line control LSI, and the common control unit 1 sends the data to the line control 1LS 141-1 to 41-m side (7) data trH.
If the read operation is possible, the microprogram of the common control unit 1 reads the status register in the line side tllLsI, determines whether it is a read request or read permission, and if the read operation is possible, the line control is performed. The micro-buffer of the common control unit 1 is inserted every time one byte of data is transferred, which reads the received data on the line assembled by the LSI and writes it to the area corresponding to each line in the memory 2. Transfer format % expression % Also, DMA mode refers to line control LSI41-1 to 4
A direct memory access controller (hereinafter referred to as a DMA control circuit) is provided between 1-m and the memory 2,
The DMA fIII 6i1 circuit receives instructions from the common control unit 1 about the start address and end address of transfer data or the number of bytes to transfer, and if the line control LSI is on the sending side, sends the data to the transmission request terminal of the line control LSI. By outputting the request signal, addresses r+1 . , while reading the data, and inputting the data to the line control LSI. Also, if the line control L1 is on the receiving side, a reception completion indication signal (or read request signal) is output to the reception completion indication terminal of the line control LSI. By doing so, the line control 1LS is sequentially r+1.1 from the designated start address of the memory 2.
A transfer format in which data is transferred by simply instructing the DMA control circuit with the start address and end address of the transfer data or the number of bytes to be transferred using a microprogram, in which the received data read from I is sent to the corresponding address. means.

(発明が解決しようとする問題点) しかしながら、前記2つの転送形式にはそれぞれ、次の
ような問題点がある。
(Problems to be Solved by the Invention) However, each of the above two transfer formats has the following problems.

プログラム・モードの場合、回線制御2IILsIの動
作時間が共通制御部1のマイクロ・プログラム1ステッ
プの動作時間に比べて長いため、該回線制御LSIのス
テータス・レジスタの読出し、データの読出し又は書込
みの一動作毎にマイクロ・プログラムの応答待ちステッ
プが発生し、マイクロ・プログラムの処理能力が低下す
る。
In the program mode, since the operating time of the line control LSI 2IILsI is longer than the operating time of one step of the microprogram of the common control unit 1, it is difficult to read the status register, read or write data of the line control LSI. A response waiting step for the microprogram occurs for each operation, reducing the processing ability of the microprogram.

また、DMAモードの場合、回線数が増すことにより回
線制御LSIが増加し、必然的に、DMA制御回路又は
DMALSIが増加づる。
Furthermore, in the case of the DMA mode, as the number of lines increases, the number of line control LSIs increases, and the number of DMA control circuits or DMALSIs inevitably increases.

DMALSIを使用する場合は、DMALSI配下に収
容する回線制御LSIの数がLSIの仕様として決まっ
ているため、それ以上の収容数の場合は、DMALSI
をビルディングブロック型式で接続することが考えられ
るが、回線数が増減する場合、余分な回路が発生する。
When using DMALSI, the number of line control LSIs to be accommodated under DMALSI is determined by the LSI specifications, so if the number of line control LSIs to be accommodated is greater than that,
It is conceivable to connect them in a building block format, but if the number of lines increases or decreases, redundant circuits will be required.

また、マイクロ・プログラムの管理外でデータ転送を行
なうため、メモリ2上で共通制御部1との衝突を防ぐた
めの競合回路、もしくはデータ転送中はマイクロ・プロ
グラムを停止させる回路が必要となり、回路bvi雑と
なり、メモリ2内のデータ管理においては、マイクロ・
プログラムがデータ転送に介在しないため、管理データ
等を1つのデータのまとまりの中に挿入するのは困難と
なる。
Furthermore, since data is transferred outside the control of the microprogram, a contention circuit is required to prevent collision with the common control unit 1 on the memory 2, or a circuit that stops the microprogram during data transfer. bvi becomes sloppy, and data management in memory 2 requires micro-
Since the program does not intervene in data transfer, it is difficult to insert management data and the like into one data group.

本発明は前述した2つの転送形式のうち、DMAE−ド
による転送方式の問題点を除去し、適切なハード旦で構
成でき、優れた処理能力を有するデータ転送方式を実現
することを目的とする。
The purpose of the present invention is to eliminate the problems of the DMAE-mode transfer method among the two transfer formats mentioned above, and to realize a data transfer method that can be configured with appropriate hardware and has excellent processing performance. .

(問題点を解決するための手段) 本発明では前記問題点を解決するため、それぞれ回線制
御LSIを右し且つ各回線毎に対応して設けられた複数
の回線ユニット装置を、共通バスを介して共通制御部に
接続してなる通信制御装置において、共通制御部のマイ
クロ・プログラムの1ステップ毎に、回線制御LSIと
メモリとの間のデータ転送を制iづる手段と、回線制御
LSIからの各種の要求信号を共通制御部に読み取らせ
る手段とを設け、回線制御#Ls Iをダイレクトメモ
リアクセス・モードに設定し、前記要求信号に応じてマ
イクロプログラムのステップを進め、回線制御LSIに
対重るデータの読出し、又は書込みを行なうJ:うにな
した。
(Means for Solving the Problems) In order to solve the above problems, the present invention connects a plurality of line unit devices, each of which is connected to a line control LSI and is provided correspondingly to each line, via a common bus. In a communication control device which is connected to a common control unit by a common control unit, a means for controlling data transfer between a line control LSI and a memory and a means for controlling data transfer between a line control LSI and a memory are provided for each step of a micro program in the common control unit. A means for causing the common control unit to read various request signals is provided, the line control #Ls I is set to direct memory access mode, the steps of the microprogram are advanced according to the request signals, and the line control LSI is loaded. Read or write data J: Yes.

(作用) 本発明によれば、受信時には回線制御LSIにおける受
信データが組立てられた時の要求信号により、また、送
信時には回線に送出するデータの蟹求信号により、共通
制御部のマイクロプログラムのステップが進み、所定単
位毎のデータ転送がなされる。
(Function) According to the present invention, the step of the microprogram of the common control unit is controlled by the request signal when the received data is assembled in the line control LSI at the time of reception, and by the request signal of the data sent to the line at the time of transmission. progresses, and data is transferred in predetermined units.

(実施例) 第1図は本発明の一実施例を示すもので、図中、従来例
と同一構成部分は同一符号をもって表わす。
(Embodiment) FIG. 1 shows an embodiment of the present invention, and in the figure, the same components as those of the conventional example are denoted by the same reference numerals.

即ち、1は共通制御部、2はメモリ、3は共通バス、4
a−1〜4a−mは回線ユニット装置、5は回線制御部
、6は情報選択回路、7は回線選択回路、8は走査(ス
キシン)回路、41−1〜41−mは回線制御L S 
I 、42−1〜42−mは読出し書込み制御回路、4
3−1〜43−mは送信バッファ、44−1〜44−m
は受信バッファである。
That is, 1 is a common control unit, 2 is a memory, 3 is a common bus, and 4 is a common control unit.
a-1 to 4a-m are line unit devices, 5 is a line control unit, 6 is an information selection circuit, 7 is a line selection circuit, 8 is a scanning (scanning) circuit, and 41-1 to 41-m are line control L S
I, 42-1 to 42-m are read/write control circuits, 4
3-1 to 43-m are transmission buffers, 44-1 to 44-m
is the receive buffer.

共通制御部1は、マイクロ・プログラムを内蔵し、共通
バス3によりメモリ2および回線ユニツ1〜装買4a−
1〜4a−m内の送信バッファ43−1〜43−m、受
信バッファ44−1〜44−mに接続され、回線制御L
S 141−1〜41−mハ、送信バッファ43−1〜
43−mおよび受信44−1〜44−mに直接接続され
ている。また、共通制御部1のマイクtコ・プログラム
により直接制御される回線制御部5と、回線ユニット装
置の回線制御LSI41−1〜41−mとは制御信号線
により接続される。
The common control unit 1 has a built-in micro program, and is connected to the memory 2 and the line units 1 to 4a by the common bus 3.
It is connected to the transmission buffers 43-1 to 43-m and the reception buffers 44-1 to 44-m within 1 to 4a-m, and the line control L
S 141-1~41-mc, transmission buffer 43-1~
43-m and reception 44-1 to 44-m. Further, the line control unit 5 directly controlled by the microphone tco program of the common control unit 1 and the line control LSIs 41-1 to 41-m of the line unit device are connected by control signal lines.

回線制御XILs 141−1〜41−mは該回線制御
部5と共通制御部1とから、共通バス3を介して送出さ
れてくるデータにより制御される。
The line control XILs 141-1 to 41-m are controlled by data sent from the line control unit 5 and the common control unit 1 via the common bus 3.

また、回線制御LS 141−1〜41−mのDMA制
御端子信号は情報選択回路6に接続され、共通制御部1
より指示された回線選択情報を保持している回線選択回
路7からの情報により、情報選択回路6において、回線
制御LS I41−1〜41−mのDMA制御!Il喘
子信号を回線毎に選択し、スキャン回路8により共通制
御部1にて読取る。
Further, the DMA control terminal signals of the line control LS 141-1 to 41-m are connected to the information selection circuit 6, and the common control unit 1
The information selection circuit 6 performs DMA control of the line control LS I41-1 to 41-m based on the information from the line selection circuit 7 holding the line selection information instructed by the ! The Il pancreatic signal is selected for each line and read by the common control unit 1 using the scan circuit 8.

ここで、前記回線制御部5は、共通制御部のマイクロ・
プログラムの1ステップ毎に、回線制御LSIとメモリ
との間のデータ転送を直接制御する手段を構成し、また
、情報選択回路61回線選択回路7.スキャン回路8は
、回線制御LSIからの各種の要求信号を共通制御部に
直接読み取らせる手段を構成する。
Here, the line control section 5 is a microcontroller of the common control section.
The information selection circuit 61 and the line selection circuit 7 constitute means for directly controlling data transfer between the line control LSI and the memory for each step of the program. The scan circuit 8 constitutes means for causing the common control section to directly read various request signals from the line control LSI.

次に動作について説明する。Next, the operation will be explained.

まず、共通制御部1から共通バス3に回線制御LSIの
制御データを送出し、同時に回線制御部5を起動し、回
線制御LSIに動作モード(DMAモード)の指示を行
なう。
First, control data for the line control LSI is sent from the common control unit 1 to the common bus 3, and at the same time, the line control unit 5 is activated and an operation mode (DMA mode) instruction is given to the line control LSI.

受信時において、回線制御1LSI、例えば41−1は
1バイトのキャラクタを組立て終わると、DM A m
1ll gA端子信号のうち、1バイト受信完了表示信
号をオンする。回線選択回路7により、情報選択回路6
に回線制御LSI41−1の四線がセットされると、回
線制御LSI41−1のDMA制御端子信号がスキャン
回路8にセットされ、該DMA制す11端子信号は共通
制御部1で読取られる。共通制御部1は回線制御111
LsI41−1で1バイトの回線−1−夕が組上がった
ことを認識し、また、回線ユニット装置4a−1では読
出し書込み制御回路42−1において、前記1バイ1〜
受信完了表示信号がオンしたことにより、回線料yJL
S+41−1から受信データを読出し、受信バッファ4
4−1に読取っておく。
At the time of reception, when the line control 1LSI, for example 41-1, completes assembling a 1-byte character, the DM A m
1ll Turns on the 1-byte reception completion display signal among the gA terminal signals. By the line selection circuit 7, the information selection circuit 6
When the four wires of the line control LSI 41-1 are set, the DMA control terminal signal of the line control LSI 41-1 is set to the scan circuit 8, and the 11-terminal signal controlling the DMA is read by the common control unit 1. Common control unit 1 is line control 111
The LsI 41-1 recognizes that the 1-byte line-1-2 has been assembled, and the line unit device 4a-1 also uses the read/write control circuit 42-1 to read the 1-byte line 1-1.
When the reception completion display signal turns on, the line charge yJL
Read the received data from S+41-1 and transfer it to the receive buffer 4.
Read it in 4-1.

次に共通制御部1では、受信バッファ44−1に保持さ
れている組上がった回線データを読取るために、回線ユ
ニット装置4a−1を指定し、共通バス3経出で受信バ
ッファ44−1を読取り、該読取りデータをメモリ2の
該当する回線対応のエリアに書込む。
Next, the common control unit 1 specifies the line unit device 4a-1 to read the assembled line data held in the receive buffer 44-1, and reads the receive buffer 44-1 via the common bus 3. Read and write the read data to the area of the memory 2 corresponding to the corresponding line.

送信時においては、回線制御LSI、例えば41−1に
動作モード(DMAモード)が設定された時点で、回線
に送出するデータを要求する送信要求が、受信時と同じ
< D M A tdl IiO端子信号内でオンする
At the time of transmission, when the operation mode (DMA mode) is set in the line control LSI, for example 41-1, the transmission request for requesting data to be sent to the line is the same as at the time of reception.< DMA tdl IiO terminal Turns on within the signal.

情報選択回路6で選択された送信要求信号は、スキャン
回路8を経て共通制御部1で読取られる。
The transmission request signal selected by the information selection circuit 6 is read by the common control unit 1 via the scan circuit 8.

共通制御部1は送信要求を検出すると、メモリ2の該当
する回線対応のエリアより送信データを1パイ5Vt出
し、共通バス3を介して、回線ユニット装置4a−1の
送信バッファ43−1に書込む。
When the common control unit 1 detects a transmission request, it outputs 1 pie 5Vt of transmission data from the area corresponding to the corresponding line in the memory 2, and writes it to the transmission buffer 43-1 of the line unit device 4a-1 via the common bus 3. It's crowded.

回線ユニット装置1ff4a−1では、読出し書込み制
御回路42−1において、回線側tlOLsI41−1
の送信要求があり、送信バッファ43−1に送信データ
が書込まれたことにより、送信バッファ43−1に保持
されている送信データを回線制御LSI41−1に書込
む。而して、回線制御LSI41−4は回線側にデータ
を送出する。
In the line unit device 1ff4a-1, in the read/write control circuit 42-1, the line side tlOLsI41-1
When there is a transmission request and the transmission data is written to the transmission buffer 43-1, the transmission data held in the transmission buffer 43-1 is written to the line control LSI 41-1. The line control LSI 41-4 then sends data to the line side.

このように前記実施例によれば、回線側tllLsIと
メモリとの間のDMA転送機能をマイクロ・プログラム
に肩代わりさせることにより、DMALSIを用いた場
合のような無駄な回路をなくすことができ、回線制御L
SIからのデータの読出しJ3よび書込みがマイクロ・
プログラムの負担にならぬよう回線制御LSIの外に送
信J3よび受信バッファを設けること、およびデータ転
送を回線制御部で制御することにより、マイクロ・プロ
グラムの処理能力の向上を図ることができ、さらに送受
信データの転送にマイクロ・プログラムが1バイト毎に
介在するので、メモリ上でのデータ管理が容易となる。
In this way, according to the above embodiment, by having the microprogram take over the DMA transfer function between the line side tllLsI and the memory, it is possible to eliminate unnecessary circuits as in the case of using DMALSI, and Control L
Reading and writing of data from SI is performed by micro
By providing the transmission J3 and reception buffer outside the line control LSI so as not to burden the program, and by controlling data transfer with the line control unit, it is possible to improve the processing ability of the micro program. Since a microprogram intervenes for each byte in the transfer of transmitted and received data, data management on the memory becomes easy.

前記実施例において、回線制御LSI41−1〜41−
mのDMAモードでのデータ読出し、書込み時間が大き
なものでなければ、回線ユニット装置4a−1〜4a−
mの読出し書込み制御回路42−1〜42−m、送信バ
ッファ43−1〜43−mおよび受信バッファ44−1
〜44−mを省略し、共通制御部1で直接、回線制御L
 S I 、41−1〜41−mを読出し、書込み制御
をなしてもよい。
In the embodiment, the line control LSIs 41-1 to 41-
If the data read/write time in the DMA mode of m is not long, the line unit devices 4a-1 to 4a-
m read/write control circuits 42-1 to 42-m, transmission buffers 43-1 to 43-m, and reception buffer 44-1
~44-m is omitted, and the common control unit 1 directly controls the line control L.
Writing control may be performed by reading S I and 41-1 to 41-m.

(発明の効果) 以上説明したように本発明によれば、回線制御LSIと
メモリとの間のDMA転送様能をマイクロ・プログラム
に肩代わりさせることにより、DMALSIを用いた場
合のような無駄な回路をなくすことができ、また、デー
タ転送を間接的に制御することによりマイクロ・プログ
ラムの処理能力の向上を図ることができ、さらに送受信
データの転送にマイクロ・プログラムが所定単位毎に介
在するので、メモリ上でのデータ管理が容易になる等の
利点がある。
(Effects of the Invention) As explained above, according to the present invention, the function of DMA transfer between the line control LSI and the memory is taken over by a microprogram, thereby eliminating unnecessary circuits such as when using DMALSI. In addition, by indirectly controlling the data transfer, it is possible to improve the processing ability of the micro program.Furthermore, since the micro program intervenes in the transfer of sent and received data in predetermined units, This has advantages such as easier data management on memory.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明方式の一実施例を示すブロック図、第2
図は従来のデータ転送方式を示すブロック図である。 1・・・共通制御部、2・・・メモリ、3・・・共通バ
ス、4a−1〜4a−m・・・回線ユニット装置、5・
・・回線制御部、6・・・情報選択回路、7・・・情報
選択回路、8・・・スキャン回路、41−1〜41−m
・・・回線制御LSI、42−1〜42−m・・・読出
し書込み制御回路、43−1〜43−m・・・送信バッ
ファ、44−1〜44−m・・・受信バッファ。 特許出願人 沖電気工業株式会社 日本電信電話株式会社
FIG. 1 is a block diagram showing an embodiment of the method of the present invention, and FIG.
The figure is a block diagram showing a conventional data transfer method. DESCRIPTION OF SYMBOLS 1... Common control unit, 2... Memory, 3... Common bus, 4a-1 to 4a-m... Line unit device, 5...
... Line control unit, 6 ... Information selection circuit, 7 ... Information selection circuit, 8 ... Scan circuit, 41-1 to 41-m
. . . line control LSI, 42-1 to 42-m . . . read/write control circuit, 43-1 to 43-m . . . transmission buffer, 44-1 to 44-m . . . reception buffer. Patent applicant Oki Electric Industry Co., Ltd. Nippon Telegraph and Telephone Corporation

Claims (1)

【特許請求の範囲】 それぞれ回線制御LSIを有し且つ各回線毎に対応して
設けられた複数の回線ユニット装置を、共通バスを介し
て共通制御部に接続してなる通信制御装置において、 共通制御部のマイクロ・プログラムの1ステップ毎に、
回線制御LSIとメモリとの間のデータ転送を制御する
手段と、 回線制御LSIからの各種の要求信号を共通制御部に読
み取らせる手段とを設け、 回線制御LSIをダイレクトメモリアクセス・モードに
設定し、前記要求信号に応じてマイクロプログラムのス
テップを進め、回線制御LSIに対するデータの読出し
、又は書込みを行なうようになしたことを特徴とする 擬似DMA方式。
[Scope of Claims] A communication control device in which a plurality of line unit devices each having a line control LSI and provided correspondingly to each line are connected to a common control unit via a common bus. For each step of the micro program of the control section,
Means for controlling data transfer between the line control LSI and memory and means for causing the common control unit to read various request signals from the line control LSI are provided, and the line control LSI is set to direct memory access mode. . A pseudo DMA system, characterized in that the step of the microprogram is advanced in response to the request signal, and data is read from or written to a line control LSI.
JP61074352A 1986-04-02 1986-04-02 Pseudo dma system Granted JPS62232057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61074352A JPS62232057A (en) 1986-04-02 1986-04-02 Pseudo dma system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61074352A JPS62232057A (en) 1986-04-02 1986-04-02 Pseudo dma system

Publications (2)

Publication Number Publication Date
JPS62232057A true JPS62232057A (en) 1987-10-12
JPH0471224B2 JPH0471224B2 (en) 1992-11-13

Family

ID=13544645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61074352A Granted JPS62232057A (en) 1986-04-02 1986-04-02 Pseudo dma system

Country Status (1)

Country Link
JP (1) JPS62232057A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0241542A (en) * 1988-08-02 1990-02-09 Fujitsu Ltd Bus abnormality detection processing system for communication processor
JPH03265334A (en) * 1990-03-15 1991-11-26 Hitachi Ltd Multi-channel communication processor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0241542A (en) * 1988-08-02 1990-02-09 Fujitsu Ltd Bus abnormality detection processing system for communication processor
JPH03265334A (en) * 1990-03-15 1991-11-26 Hitachi Ltd Multi-channel communication processor

Also Published As

Publication number Publication date
JPH0471224B2 (en) 1992-11-13

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