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Semiconductor integrated circuit device

A technology of integrated circuits and semiconductors, applied in useful technical fields, can solve the problems of large number of commands and long processing time, and achieve the effect of reducing extra consumption and shortening recovery time.

Inactive Publication Date: 2012-01-25
NEC ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large number of commands that should be executed when starting the software, the processing time is extremely long

Method used

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  • Semiconductor integrated circuit device
  • Semiconductor integrated circuit device
  • Semiconductor integrated circuit device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] figure 1 It is an example showing a wiring layout diagram of a chip to which the present invention is applied. In this figure, it shows the normal power supply rail, that is, the power supply line VDD (for example, 1.2V) and the virtual power supply line VSSM (0V), the nonvolatile flip-flop NVFF (hereinafter referred to as the nonvolatile FF ) is an example where the information holding circuit is wired with the power supply VSS_SIG (0V). In this example, since it is assumed that the power supply line on the ground side (low potential side) is turned off during standby, the power supply line on the low potential side is designated as a virtual power supply line VSSM. In the automatic configuration and wiring tool, the virtual power supply line VSSM is treated as the actual ground line of the unit. As shown in the figure, the wiring VSS_SIG is connected to the terminals of the nonvolatile FFs NVFF distributed in the circuit block by an automatic layout and wiring tool...

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Abstract

The invention provides a semiconductor integrated circuit device. In a low power consumption mode in which prior data is retained upon power shutdown, the return speed thereof is increased. While use of an existent data retaining flip-flop may be considered, this is not preferred since it increases area overhead such as enlargement of the size of a cell. A power line for data retention for power shutdown is formed with wirings finer than a usual main power line. Preferably, power lines for a data retention circuit are considered as signal lines and wired by automatic placing and mounting. Forthis purpose, terminals for the power line for data retention are previously designed by providing the terminals therefor for the cell in the same manner as in the existent signal lines. Additional layout for power lines is no longer necessary for the cell, which enables a decrease in the area and design by an existent placing and routing tool.

Description

[0001] This application is a divisional application of the Chinese invention patent application with the application number 200410057608.4 and the invention name "semiconductor integrated circuit device" submitted by the same applicant on August 20, 2004. technical field [0002] The present invention relates to semiconductor integrated circuit devices, and in particular, to useful techniques applied to system LSIs or microprocessors. Background technique [0003] In system LSIs used for portable information terminals typified by mobile phones, there is an increasing demand for long-time operation with limited battery capacity. In particular, in mobile phones, in order to satisfy the requirement of long-time operation, it is very important to reduce power consumption during long-time standby (a state in which high-load processing is not performed although the power is turned on). As a solution to this, there is a method of stopping all clocks in the system LSI in a standby s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C11/417G11C5/06H03K3/356
Inventor 菅野雄介水野弘之入江直彦
Owner NEC ELECTRONICS CORP