Data output system, method and data output controller

Abstract

This invention discloses a data output system including: multiple data output modules capable of processing data, a data receiving module receiving data output by multiple data output modules, a bus connecting the data output modules and the receiving module, a control module connected with the output modules, a selection module used in selecting one from the output modules at the same time and allowing it to output data to the receiving module, in which, the control module controls the multiple data output modules after selecting said output module to allow outputting data by said module only. This invention also discloses a control device for data output and a data output method.

Description

technical field [0001] The invention relates to the technical field of control circuits, in particular to a data output system, method and data output control device. Background technique [0002] Multi-choice control circuits are often used in electronic equipment. The usual usage is to use one or more selectors to realize the centralized multi-choice function after signals from multiple sources arrive at the same destination. The method is called centralized multiple selection one control circuit. Such as figure 1 As shown, a schematic diagram of a centralized multiple selection one control circuit is provided, which includes: multiple line cards, a selector, and a board card, each line card is connected to the selector, and the signals sent by multiple line cards are selected After the controller is controlled, the signal sent by only one line card is output to the receiving card at each moment. [0003] figure 2 Shown is a typical circuit diagram of a selector in th...

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Problems solved by technology

[0005] 1. When there are many sources, there is a problem of too many wires. When the selector is used to realize the multi-choice control circuit, there must be a channel between each source and the destination. When the number of sources increases, for example, 14 1, 28 or more, will occupy a lot of channels, which means that a lot of pins will be occupied in the backplane, and the use will be limited when the pins of the backplane are tight.

[0006] 2. In this solution, the controller only has 8 source interfaces. When there are many sources, multiple selectors need to be used to adopt multi-pole selection, which is complicated to implement and may be error-prone

After adopting this method, the problem of too many wires in the first solution can be avoided, but when there is a software error or interference, multiple sources will be output at the same time, which will damage the device, and it cannot really output one source at a time. signal of

[0009] It can be seen that the multi-select one control circuit in the prior art is prone to error or interference, and cannot really output the signal of one source at a time

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