KR100587317B1 - Method and apparatus for detecting presumption consumption power of the ASIC - Google Patents

Abstract

An apparatus for detecting expected power consumption of an on-demand semiconductor having a target system board, the apparatus comprising: a first power supply unit supplying power to the target system board, a second power supply unit supplying power to a programmable logic device in the target system board; A current meter outputting an instantaneous change amount of the current supplied to the programmable logic device through the second power supply unit as an analog current level signal, and converting an analog current level signal output through the current meter into a digital current level signal. A controller which receives an analog / digital converter, the output of the analog / digital converter and the target system board, analyzes the power consumption, and outputs a control signal to display the analysis result on the screen; On the screen It consists of a display unit that displays the power consumption during real-time operation of the target system board, and displays the main signals necessary for analysis as waveforms on the display unit along with the signals related to power consumption measurement or further analysis. By storing it in memory, the estimated power consumption can be detected quickly.

Custom semiconductor

Description

Method and apparatus for detecting presumption consumption power of the ASIC

1 is a view showing a power consumption detection process of a custom semiconductor according to the prior art

2 is a view showing a power consumption detection device of a custom semiconductor according to the prior art

3 is a diagram illustrating an apparatus for detecting power consumption of an on-demand semiconductor according to the present invention.

4 shows an embodiment according to the invention.

Explanation of symbols for main parts of the drawings

100: FPGA 101: Target System Board

102: first power supply unit 103: second power supply unit

104: current meter 105: A / D converter

106: control unit 106a: stimulation I / F board

106b: HDD 107: Monitor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to semiconductor devices, and more particularly, to an apparatus and method for detecting expected power consumption of custom semiconductors.

As the application scope and application tools of general application specific integrated circuits (ASICs) are diversified, the chip becomes complicated and the amount of memory required to implement the functions takes up a considerable portion.

Hereinafter, an on-demand semiconductor device according to the prior art will be described with reference to the accompanying drawings.

1 is a view showing a power consumption calculation method of a custom semiconductor according to the prior art, Figure 2 is a view showing a power consumption calculation apparatus of a custom semiconductor according to the prior art.

Referring to FIG. 1, a design netlist 1 and a simulation vector file 2 are designated as inputs of a simulation tool to perform a simulation process.

The simulation (4) is a preparatory step for performing a full-scale simulation. Through the process of reading the design netlist (1), the type of library cell used by the design netlist (1) is found out from the entire library cells. The node relationship between the cells constituting the netlist and the cells is extracted.

In addition, the input of each timing step of the simulator vector file 2 is applied to the corresponding input / output port of the design netlist 1, causing a state transition to the internal nets of the design netlist 1.

For each timing step, the toggle count is increased by one for the occurrence of the potential of the state among all the nets of the design netlist 1.

The power consumption divided into intrinsic power consumption and net power consumption represented by leakage current and short circuit current is calculated by the following equation.

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Where Pi is the intrinsic power consumption due to short-circuit current, C is the capacitance of the output net of the unit library cell, V is the input voltage, and Tr is the toggle rate of the cell net.

The power consumption to be obtained is obtained by summing the unit power consumption calculated through the above equation.

An on-demand semiconductor device according to the prior art to which the above method is applied will be described with reference to FIG. 2.

As shown in FIG. 2, an ASIC 10, which is a kind of program logic device, a target system board 20 representing an overall system environment, and a first power source for supplying power to the target system board 20. And a power meter 40 for supplying power to the ASIC 10 on the target system board 20 and displaying power consumption.

The power meter 40 analogizes the instantaneous change amount of the current flowing through the second power supply unit 41 and the second power supply unit 41 to supply power to the ASIC 10 on the target system board 20. A current meter 42 for outputting at a current level, an analog / digital converter 43 for converting an analog current level output from the current meter 42 into a digital current level, and an output of the analog / digital converter 43. And a lookup table (LUT) 44 for storing display values for displaying on the display section 45. In this case, the display unit 45 uses 7-segment or LCD.

The power consumption sensing device of the custom semiconductor configured as described above operates as follows.

First, the design netlist 1 is converted into a bit stream file in which the ASIC 10 can be programmed after being processed by an ASIC 10 dedicated tool.

Subsequently, the first and second power supply units 30 and 40 are turned on to supply power to the target system board 20 and the ASIC 10. However, all VDD and VCC of the ASIC 10 are connected to the output terminal of the current meter 42 embedded in the second power supply 40.

The bit stream file is downloaded to the ASIC 10 in order to map the design netlist 1 to the ASIC 10.

When the design mapping is completed on the ASIC 10, the target system board 20 is operated under the actual system environment.

In addition, the current flowing into the ASIC 10 changes every minute according to the operating conditions of the target system board 20, and thus the result is reflected to the analog output of the current meter 42.

The analog output value converted by the current meter 42 is converted into a digital value through the analog / digital converter 43, and the value output by the analog / digital converter 43 is converted by the lookup table 44. It is converted into a value for driving the display device.

In addition, the value converted by the lookup table 44 is transferred to the display unit 45 such as 7-segment or LCD to display the amount of current flowing into the ASIC 10.

However, the expected power consumption sensing apparatus and method of a custom semiconductor according to the prior art has the following problems.

First, it is ambiguous to find out the operating conditions of the design at the time when the peak value is detected.

Second, since peak power consumption is not displayed, it is difficult to analyze the operating conditions by main signal monitoring to analyze peak power consumption.

The present invention has been made to solve the above problems, the average power consumption or peak value of the on-demand semiconductor device to display on the screen, or stored in the form of a data file to facilitate power analysis according to various operation modes It is an object of the present invention to provide an apparatus and method for detecting power consumption of an on-demand semiconductor device.

In accordance with an aspect of the present invention, there is provided a custom semiconductor having a target system board, comprising: a first power supply for supplying power to the target system board, a second power supply for supplying power to a programmable logic device in the target system board; A current meter for outputting an instantaneous change amount of the current supplied to the programmable logic device through the second power supply unit as an analog current level signal, and an analog for converting the analog current level signal outputted through the current meter into a digital current level signal A control unit for outputting a control signal to analyze the power consumption by receiving the output of the digital converter, the analog / digital converter and the target system board, and to display the analysis result on the screen, according to the control signal of the control unit. Display the analysis result on the screen It is configured to include a display.

Hereinafter, an apparatus and method for detecting power consumption of an on-demand semiconductor according to the present invention will be described with reference to the accompanying drawings.

3 is a view showing a power consumption detection device of a custom semiconductor according to the present invention.

As shown in FIG. 3, an apparatus for detecting power consumption of an on-demand semiconductor according to the present invention includes an FPGA 100, which is a type of programmable logic device, a target system board 101 representing an overall system environment, and the target system board. A first power supply 102 for supplying power to the 101, a second power supply 103 for supplying power only to the FPGA 100, an output terminal of the second power supply 103, and an FPGA A current meter 104 connected between the input terminals of the output terminal 100 to output an instantaneous change amount of the current flowing into the FPGA 100 as an analog current value, and an analog current value output from the current meter 104 to a digital current. The analog / digital converter 105 for converting to a level and the output of the analog / digital converter 105 and the target system board 100 are applied to analyze the power consumption, and accordingly output a control signal. And a control unit 106, consists of a monitor 107 for displaying the power consumption analysis according to the control signal of the controller 106.

The customized semiconductor power consumption sensing device configured as described above first converts the design netlist into a bit stream file that can be programmed by using a compiler provided by an FPGA tool to program a programmable logic device such as the FPGA 100.

After turning on the target system board 101 and before the main operation of the system, the bit stream file is set as the programming condition of the programmable logic device so that the programmable logic device can be programmed immediately.

That is, it stores in the hard disk driver (HDD) 106b and preprograms the device itself as a bit stream file.

In order to operate the target system board 101, the power of the first power supply 102 and the second power supply 102 is turned on, and the power I / Os of the FPGA 100 are all connected in one place. Then, it is connected to the output terminal of the current meter 104 again.

When design mapping is completed on the FPGA 100, the target system board 101 is operated.

As the target system board 101 performs the operation, the FPGA 100 also performs the operation of the mapped design netlist. At this time, the current meter connected between the second power supply 103 and the FPGA 100. In 104, the amount of current flowing into the FPGA 100 is represented by an analog value.

The analog output value of the current meter 104 indicating the current inflow into the FPGA 100 is converted into a digital value through the A / D converter 105.

Signals that are input when the digital values output from the A / D converter 105 and the main signals on the target system board 101 required for analysis are input to the built-in stimulus I / F board 106a of the controller 106. Stores a continuous data change in a bank of its own memory having a dual-bank memory structure.

When the bank memory (not shown) is completely filled, while the input data is continuously stored in the other bank memory (not shown), the contents of the already opposite fully filled bank memory (not shown) are transferred to the main memory (not shown). Iteratively performs the operation.

That is, the data transferred from the stimulus I / F board 106a to the main memory (not shown) is displayed on the screen in chunk-memory units having the same size as one bank-memory (not shown) according to mapping information. do.

In this case, the output data of the A / D converter 105 is output on the monitor 107 in the form of a distribution-view, and other input signals are expressed as '0' or '1'.

For example, if the menu window of the main window specifies that up to five windows are to be stored with the highest peak power consumption, the software detects the peak value from the incoming data and stores it in temporary memory, followed by the next incoming data. The new peak value is updated on temporary memory by processing in a way that compares with.

In the process of processing input data continuously as a window of a certain unit, it is possible to process the power consumption so that the average power consumption and the maximum power consumption can be expressed numerically, it is possible to monitor the power consumption in real time.

In addition, detailed power consumption analysis is performed by referring to other important signals required for power consumption analysis. In this process, the design mapped to the programmable logic device such as the FPGA 100 shows the maximum power consumption under what conditions of operation mode. Can be analyzed.

When the FPGA 100 is the final target device, the peak current value detected through the above process times the input voltage set by the second power supply 103 may be regarded as the peak power consumption. When the device is an ASIC, it is necessary to adjust the power consumption detected through the above process as a fixed value.

The power consumption correction problem can be minimized in the following ways.

In general, power consumption increases as the size increases, and also varies according to the toggle rate, the average of the numbers that are activated at one instant relative to the overall operation of the design.

Designs with large toggles consume more power than designs without. Considering this fact, the power consumption can be expressed by the following equation.

(단, C_Lopt는 일정값, Tgr은 전체 디자인의 토글레이트, P_F는 디자인이 FPGA로 매핑된 경우 FPGA의 전력소비량, P_FR은 대기상태에서 FPGA의 전력소비량, P_R은 실제 ASIC의 전력소비량, P_RS는 대기상태에서 실제 ASIC의 전력소비량)

(Where C _Lopt is a constant value, Tgr is the toggle rate of the entire design, P _F is the power consumption of the FPGA when the design is mapped to the FPGA, P _FR is the power consumption of the FPGA in the standby state, and P _R is the power of the actual ASIC Consumption, P _RS is the actual power consumption of the ASIC in the standby state)

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In the above relation, after mapping a design already made of an ASIC to an FPGA, Equations 2 and 3 determine the proportional constants A and B such that the equation relation is established.

Here, the relationship between the power consumption amount of the above equation can be expressed as follows.

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However, when the correction variables are C and D, they are expressed as follows.

C = B / A, D = (A × P _RS -B × P _FS )

As described above, the real-time power consumption of the design executed in the FPGA 100, which is a programmable logic device operated under the target system board 101 environment, is determined by the voltage and current meter 104 set in the second power supply 103. Through the instantaneous detection value of the real-time current flowed into the stimulus I / F board 106a through multiplying the correction variable C of Equation 4, and add the D is regarded as the real-time power consumption for the ASIC. The stimulus I / F board 106a performs a function of continuously delivering a stimulus input to a main memory of the PC.

Apparatus for detecting power consumption of an on-demand semiconductor according to the present invention has the following effects.

First, since the design is mapped and operated on the programmable logic device under the target system board environment, it does not affect the simulation and the simulation vector as in the case of calculating the power consumption by the simulation.

Second, it can easily cope with the trend of larger design.

Third, by monitoring the status of power consumption during real-time operation of the target system board, the main signals necessary for analysis are displayed on the monitor in wave form along with the signals related to power consumption measurement or stored in memory for later analysis. The estimated power consumption can be detected in a short time.

Claims (4)

In the custom semiconductor having a target system board, A first power supply unit supplying power to the target system board; A second power supply unit supplying power to a programmable logic device in the target system board; A current meter outputting an instantaneous change amount of the current supplied to the programmable logic device through the second power supply as an analog current level signal; An analog / digital converter for converting an analog current level signal output through the current meter into a digital current level signal; A controller which receives the output of the analog / digital converter and the target system board, analyzes the power consumption, and outputs a control signal to display the analysis result on the screen; And, And a display unit configured to display the analysis result on the screen according to a control signal of the controller. The method of claim 1, The control unit is a stimulus I / F board for processing the signal to be displayed on the screen by receiving the output of the analog / digital converter and the target system board; Estimated power consumption of the on-demand semiconductor, characterized in that consisting of a hard disk driver for storing the signal processed in the stimulus I / F board. The method of claim 1, And said programmable logic device is an FPGA. The method of claim 1, And the controller controls to detect the estimated power consumption by comparing and determining the maximum power consumption and the input power consumption continuously.

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