JPS5890423U

JPS5890423U - Input/Output Device Diagnostic Device

Info

Publication number: JPS5890423U
Application number: JP15444182U
Authority: JP
Inventors: 高井　隆治; 藤森　臣「あ」
Original assignee: Fujitsu Ltd
Current assignee: Fujitsu Ltd
Priority date: 1982-10-14
Filing date: 1982-10-14
Publication date: 1983-06-18
Also published as: JPS599304Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This publication contains application data prior to electronic filing, so abstract data will not be recorded.

Description

[Brief description of the drawings]

第１図は一般的なＩ１０装置を示すブロック図、第２図
はライト・モード下で本考案の診断装置を実施するため
の回路例を示すブロック図、第３図はリード・モード下
で本考案の診断装置を実施するための回路例を示すブロ
ック図である。図において、１１はＩ１０装置、１２はコントロール部
、１３はデバイス部、１４はライト・データ・バス、１
５はリード・データ・バス、２１・はゲート手段、２２
はライト・データ発生部、２３はチェック部、３１はセ
レクタ、３２は診断データ・バス・３３はリード・デー
タ処理部、３４は診断データ発生部、３５はチェック部
、Ｄは診断モード指定、Ｅ□、Ｅ２はエラー信号である
。 Fig. 1 is a block diagram showing a general I10 device, Fig. 2 is a block diagram showing an example of a circuit for implementing the diagnostic device of the present invention in a write mode, and Fig. 3 is a block diagram showing an example of a circuit for implementing the diagnostic device of the present invention in a read mode. In the figures, 11 is an I10 device, 12 is a control section, 13 is a device section, 14 is a write data bus, 1
5 is a read data bus, 21 is a gate means, 22
denotes a write data generator, 23 a check section, 31 a selector, 32 a diagnostic data bus, 33 a read data processor, 34 a diagnostic data generator, 35 a check section, D a diagnostic mode designation, and E□ and E2 error signals.

Claims

[Scope of utility model claims]

In an input/output device having a control section and a device section mutually connected by a write data bus and a read data bus, when a diagnostic mode is designated, the write data bus and the read data bus are
and a check means for determining whether there is an abnormality in the data by supplying normal data generated by the control unit within the control unit, or determining that there is an abnormality in the device unit when no abnormality in the data is detected, and for executing diagnosis, wherein in a write mode, the closing means serves as a gate means for closing the write data bus, and in a read mode, the closing means serves as a gate means for closing the write data bus and also serves as a selector for closing the read data bus and switching the read data bus to a diagnostic data bus for transmitting normal data within the control unit, and further wherein, when the diagnostic mode is specified, the gate means operates as a code generating unit for generating a safety code for safely operating the device unit.