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Load detection circuit, SOC system, and configuration method of load detection circuit

A technology for detecting circuits and configuration methods, applied in the direction of electronic circuit testing, measuring electricity, measuring devices, etc., can solve the problem that there is no good solution for load detection.

Active Publication Date: 2020-07-07
CHENGDU HAIGUANG INTEGRATED CIRCUIT DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also multiple power domains in the SOC system. In this case, there may be multiple power domains connected in series, and the power supply voltages between the power domains are different. However, the load detection of the SOC system with multiple power domains has not yet good solution

Method used

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  • Load detection circuit, SOC system, and configuration method of load detection circuit
  • Load detection circuit, SOC system, and configuration method of load detection circuit
  • Load detection circuit, SOC system, and configuration method of load detection circuit

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Experimental program
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Effect test

Embodiment approach 1

[0081] [Multi-power domain SOC system]

[0082] Figure 5 A block diagram of a load detection module in the SOC system according to Embodiment 1 of the present invention is shown. exist Figure 5 In the figure, it is shown that the SOC system includes two power domains, the first power domain and the second power domain, which are arranged in series, supplying power supply voltages VDD1 and VDD2 to different modules respectively, and multiple delays are respectively configured for each power domain Unit Z1, these delay units Z1 are connected in series with each other to form a ring oscillator.

[0083] In the present invention, the delay units Z1 arranged in the respective power domains have basically the same circuit structure.

[0084] It should be noted that, in order to simplify the description, it is illustrated that the SOC system includes 2 power domains, but the SOC system may include more than 3 power domains. In addition, in the embodiment, the SOC system is used...

Embodiment 1

[0093] In the simulation, in the above step s1, the critical path is fitted to obtain the delay time of each power domain, and the set voltage of each power domain is the actual working voltage. Assuming that the voltage VDD1 of the first power domain is 1v, the delay time of the first power domain is 1 nanosecond (ns), the voltage VDD2 of the second power domain is 1.2v, and the delay time of the second power domain is 1.5 nanoseconds ( ns).

[0094] In the above step S2, the delay of the configurable delay unit under VDD1 and VDD2 is fitted, if the delay of the delay unit under VDD1 is 10 picoseconds (ps), and the delay under VDD2 is 8 picoseconds (ps), then In the entire ring oscillator, the number of delay units in the first power domain is 1ns / 10ps=100, the number of delay units in the second power domain is 1.5ns / 8ps=187.5, and the nearest integer is 188 . Accordingly, in the ring oscillator, the stage ratio of the delay cells arranged in the first power supply domain ...

Embodiment 2

[0100] In the simulation, in the above step s1, the critical path is fitted to obtain the delay time of each power domain, and the set voltage of each power domain is the actual working voltage. Assuming that the voltage VDD1 of the first power domain is 1v, the delay time of the first power domain is 1 nanosecond (ns), the voltage VDD2 of the second power domain is 1.2v, and the delay time of the second power domain is 1.6 nanoseconds ( ns).

[0101] In the above step S2, fitting the delay of the configurable power delay unit under VDD1 and VDD2, if the delay of the delay unit under VDD1 is 10 picoseconds (ps), and the delay under VDD2 is 8 picoseconds (ps), Then, in the whole ring oscillator, the number of delay units selected for the first power domain is 1 ns / 10 ps=100, and the number of delay units selected for the second power domain is 1.6 ns / 8 ps=200. Accordingly, in the ring oscillator, the stage ratio of the delay cells arranged in the first power supply domain and ...

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Abstract

The invention provides a load detection circuit, an SOC system, and a configuration method of the load detection circuit. The load detection circuit is used for detecting a power supply load in an SOCsystem with a plurality of power supply domains. The same power supply voltage is supplied to the modules in each power supply domain, and a plurality of delay units are connected in series in the load detection circuit in a ring oscillator connection mode. The plurality of delay units are divided into a plurality of groups respectively corresponding to the plurality of power supply domains, anda ratio of a total delay time generated by the delay units configured in each of the groups between the groups corresponds to a ratio of a delay time in each of the power supply domains between the power supply domains. The load detection circuit can accurately detect the system delay.

Description

technical field [0001] The present invention relates to a load detection circuit, a SOC system, and a configuration method of a load detection circuit, more specifically, to a load detection circuit that uses a ring oscillator to detect loads in multiple power domains, including the load detection circuit An SOC system with multiple power domains and a configuration method for configuring the load detection circuit in the SOC system. Background technique [0002] In SOC system design, the system load changes with the command. When the system load is large or even extreme, the operating current is large, and the actual voltage received by each module has a certain deviation from the ideal voltage. The high-speed modules designed in this way are prone to failure. . Therefore, in large-scale SOC design, a system load detection module is generally designed. When the system load is large, the frequency is reduced or the power supply capacity is increased to avoid module failure ...

Claims

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Application Information

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IPC IPC(8): G06F1/26H03K3/03G01R31/28
CPCG06F1/266H03K3/0315G01R31/2851
Inventor 张一平
Owner CHENGDU HAIGUANG INTEGRATED CIRCUIT DESIGN CO LTD
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