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Electronic apparatus with receive unit

A technology of receiving unit and electronic equipment, applied in the direction of electrical digital data processing, instruments, etc., can solve the problem of "bus hanging" and achieve the effect of avoiding bus hanging

Inactive Publication Date: 2007-12-19
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an electronic device with a receiving unit to solve the problem of "bus hanging" caused when some receiving units are powered off

Method used

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  • Electronic apparatus with receive unit
  • Electronic apparatus with receive unit
  • Electronic apparatus with receive unit

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] Embodiment 1: The unidirectional conduction device is a diode, and each driver is only connected to one bus.

[0037] In this embodiment, a subrack in a communication system is taken as an example for introduction. In this embodiment, the driving unit is a main control board of a communication system subrack, and the receiving unit is a service board.

[0038]The working principle of the plug-in frame is: the main control board sends its own status indication signal to each service board through the bus, and each service board receives it through the driver. When the state indication signal is at a high level, it indicates that the main control board is faulty, and when it is at a low level, it indicates that the main control board is available. Since the main control board may not be inserted into the frame, the design must ensure that when the main control board is not in the frame, the signal received by each service board from the "main control board status indicat...

no. 2 example

[0042] Embodiment 2: The unidirectional conduction device is a triode, and the driver is connected to multiple buses.

[0043] In this embodiment, a master device transmitting multiple clock frequencies and multiple slave devices receiving clock frequencies are taken as examples for introduction. Sometimes a master device needs to transmit clock signals of multiple frequencies to multiple slave devices, and clock signals of different frequencies use different clock traces. For the situation that some devices in the slave device are powered off, if the master device does not output the clock signal, the level on the clock line will be pulled low. When the level is equal to the judgment threshold of the driver of the slave device (higher than the judgment threshold When the driver judges it as high level, when it is lower than the judgment threshold, the driver judges it as low level), the driver in the slave device will be particularly sensitive to external interference: when t...

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Abstract

The invention discloses an electronic device with receiving unit, which comprises: a bus, a receiving unit which is connected with the bus and a driving unit used to send the driving signal to the receiving unit by bus, wherein the receiving unit comprises a driver used to transmit the driving signal which is connected with the bus and an upper resistance which is connected with the input end of the driver and the power; the receiving unit also comprises: an one-way conducting device which is connected with the upper resistance and the power used to break the driving signal of the upper resistance when the receiving unit cuts off the power.

Description

technical field [0001] The invention relates to electronic equipment, in particular to electronic equipment with multiple receiving units or multiple receiving boards. Background technique [0002] Electronic equipment in the prior art generally includes a receiving unit, a driving unit and a bus. As shown in Figure 1, multiple receiving units are hung on a bus and driven by one or more driving units; the driving units send driving signals through the bus to drive the receiving units to work. In order to ensure the stability of the receiving unit, the driver needs to be used as the interface between the receiving unit and the bus in the design, and a pull-up resistor Rup is added to the input end of the driver. [0003] However, under normal circumstances, since the output terminals of the power supply in the receiving unit are connected with various devices, there are resistances between the power supply and the ground of these devices, which is equivalent to multiple resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/38
Inventor 李友谊赵俊峰秦志海秦旭蒋麟军
Owner HUAWEI TECH CO LTD
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