JPH0359756U

JPH0359756U -

Info

Publication number: JPH0359756U
Application number: JP11988689U
Authority: JP
Priority date: 1989-10-14
Filing date: 1989-10-14
Publication date: 1991-06-12

Description

[Brief explanation of drawings]

第１図はこの考案の１実施例を示す図、第２図
はこの考案の他の実施例を示す図、第３図はコマ
ンド・シリアル・マルチプレツクスデータ転送方
式における一般的なコマンド信号のフオーマツト
を示す図、第４図は従来のデータバス端末装置を
示す図である。図において、１……ターミナルアドレスコード
、２……送受信コード、３……サブアドレスコー
ド、４……ワードカウントコード、５……シリア
ル・マルチプレツクス・データバス、６……受信
回路、７……送信回路、８……アドレステーブル
、９……アドレスカウンタ、１０……外部機器、
１１……インタフエース回路、１２……制御回路
、１３……コマンドアドレスレジスタ、１４……
コマンドバツフアである。なお、図中同一符号は
同一または相当部分を示す。 Fig. 1 shows one embodiment of this invention, Fig. 2 shows another embodiment of this invention, and Fig. 3 shows a general command signal format in the command serial multiplex data transfer system. FIG. 4 is a diagram showing a conventional data bus terminal device. In the figure, 1...Terminal address code, 2...Transmission/reception code, 3...Sub address code, 4...Word count code, 5...Serial multiplex data bus, 6...Reception circuit, 7...Transmission Circuit, 8...address table, 9...address counter, 10...external device,
11...Interface circuit, 12...Control circuit, 13...Command address register, 14...
It is a command battle. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A plurality of data bus terminal devices and at least one bus control device are connected via a serial data bus line, and data transfer between the data bus terminal devices and the bus control device and between the data bus terminal devices is performed via the bus. The data bus employs a command serial multiplex data transfer method in which the bus control device controls and executes a command signal transmitted from a control device and a response signal from the data bus terminal device that receives the command signal. 1. A data bus terminal device, comprising: a command address register that holds a destination address of a received command.