JP2000307779A5 - - Google Patents

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Publication number
JP2000307779A5
JP2000307779A5 JP1999111568A JP11156899A JP2000307779A5 JP 2000307779 A5 JP2000307779 A5 JP 2000307779A5 JP 1999111568 A JP1999111568 A JP 1999111568A JP 11156899 A JP11156899 A JP 11156899A JP 2000307779 A5 JP2000307779 A5 JP 2000307779A5
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JP
Japan
Prior art keywords
cpu
energy
storage means
semiconductor device
saving mode
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JP1999111568A
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Japanese (ja)
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JP2000307779A (en
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Priority to JP11111568A priority Critical patent/JP2000307779A/en
Priority claimed from JP11111568A external-priority patent/JP2000307779A/en
Publication of JP2000307779A publication Critical patent/JP2000307779A/en
Publication of JP2000307779A5 publication Critical patent/JP2000307779A5/ja
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Description

【特許請求の範囲】
【請求項1】 システムにおける消費電力をより少なくする省エネモードを備えたシステム装置において、
システム装置の動作を制御するCPUと、
上記CPUと同一半導体装置に内蔵され、所定の機能処理を実行する機能処理ユニットと、
上記CPUと同一半導体装置に内蔵された第1記憶手段と、
上記CPUと同一半導体装置に内蔵され、システム装置に生じた省エネ移行要因または省エネ解除要因を判定するための省エネ要因検出部と、
上記半導体装置の内部要素間のデータ伝送を行うためのバスと、
上記半導体装置の外部に設けられ、上記CPUが実行するプログラムデータを記憶した第2記憶手段を備え、
上記省エネ要因検出部が省エネ移行要因を検出すると、上記CPUは、上記第2記憶手段から上記第1記憶手段へ、上記バスを介して所定の省エネモード処理プログラムデータを転送させ、実行環境を上記第2記憶手段から上記第1記憶手段へ切り換え、上記省エネモード処理プログラムの実行状態に移行して、システム装置を省エネモードへ移行することを特徴とするシステム装置。
【請求項2】 前記半導体装置には、前記CPUに供給するクロック信号の周波数を通常周波数と省エネ用低周波数に切り換えるクロック切換手段をさらに備え、上記CPUは、省エネモード時、上記クロック切換手段により上記クロック信号の周波数を省エネ用低周波数に切り換えることを特徴とする請求項1記載のシステム装置。
【請求項3】 前記クロック信号は、前記半導体装置に内蔵される時計回路用のクロック信号であることを特徴とする請求項2記載のシステム装置。
【請求項4】 前記第1記憶手段は、通常時は前記CPUがアクセスしないアドレス領域が割り当てられていることを特徴とする請求項1または請求項2または請求項3記載のシステム装置。
【請求項5】 前記省エネモード処理プログラムデータは、前記第2記憶手段に記憶されているプログラムデータの一部であることを特徴とする請求項1または請求項2または請求項3または請求項4記載のシステム装置。
【請求項6】 前記半導体装置にアラーム機能を備えた時計回路をさらに備え、
前記CPUは、前記省エネモードに移行する際、上記時計回路に省エネモード解除時刻をセットした後に、スリープモードへ移行し、上記時計回路からアラーム信号が出力されると、上記CPUはスリープモードから復帰して、省エネモードを解除することを特徴とする請求項1または請求項2または請求項3または請求項4または請求項5記載のシステム装置。
【請求項7】 前記時計回路のアラーム信号は、前記CPUの割込信号入力端子に加えられることを特徴とする請求項6記載のシステム装置。
[Claims]
1. In a system device provided with an energy saving mode that reduces power consumption in the system.
The CPU that controls the operation of the system unit
A functional processing unit that is built into the same semiconductor device as the CPU and executes predetermined functional processing.
The first storage means built in the same semiconductor device as the CPU,
An energy-saving factor detector that is built into the same semiconductor device as the CPU and is used to determine the energy-saving transition factor or energy-saving release factor that has occurred in the system device.
A bus for transmitting data between the internal elements of the semiconductor device and
A second storage means provided outside the semiconductor device and storing program data executed by the CPU is provided.
When the energy-saving factor detection unit detects the energy-saving transition factor, the CPU transfers predetermined energy-saving mode processing program data from the second storage means to the first storage means via the bus to change the execution environment. A system device characterized by switching from the second storage means to the first storage means, shifting to the execution state of the energy saving mode processing program, and shifting the system device to the energy saving mode.
2. The semiconductor device further includes a clock switching means for switching the frequency of a clock signal supplied to the CPU between a normal frequency and a low frequency for energy saving, and the CPU uses the clock switching means in the energy saving mode. The system apparatus according to claim 1, wherein the frequency of the clock signal is switched to a low frequency for energy saving.
3. The system device according to claim 2, wherein the clock signal is a clock signal for a clock circuit built in the semiconductor device.
4. The system apparatus according to claim 1, wherein the first storage means is allocated an address area that is normally not accessed by the CPU.
5. The energy-saving mode processing program data is a part of the program data stored in the second storage means. The system device described.
6. The semiconductor device is further provided with a clock circuit having an alarm function.
When the CPU shifts to the energy saving mode, after setting the energy saving mode release time in the clock circuit, the CPU shifts to the sleep mode, and when an alarm signal is output from the clock circuit, the CPU returns from the sleep mode. The system apparatus according to claim 1, or 2, 3 or 4, 4 or 5, characterized in that the energy saving mode is released.
7. The system device according to claim 6, wherein the alarm signal of the clock circuit is applied to the interrupt signal input terminal of the CPU.

【0006】
【課題を解決するための手段】
本発明は、システムにおける消費電力をより少なくする省エネモードを備えたシステム装置において、システム装置の動作を制御するCPUと、上記CPUと同一半導体装置に内蔵された第1記憶手段と、上記CPUと同一半導体装置に内蔵され、システム装置に生じた省エネ移行要因を判定するための省エネ要因検出部と、上記半導体装置の内部要素間のデータ伝送を行うためのバスと、上記半導体装置の外部に設けられ、上記CPUが実行するプログラムデータを記憶した第2記憶手段を備え、上記省エネ要因検出部が省エネ移行要因を検出すると、上記CPUは、上記第2記憶手段から上記第1記憶手段へ、上記バスを介して所定の省エネモード処理プログラムデータを転送させ、実行環境を上記第2記憶手段から上記第1記憶手段へ切り換え、上記省エネモード処理プログラムの実行状態に移行して、システム装置を省エネモードへ移行するようにしたものである。
0006
[Means for solving problems]
The present invention includes a CPU that controls the operation of the system device, a first storage means built in the same semiconductor device as the CPU, and the CPU in a system device having an energy saving mode that reduces power consumption in the system. An energy-saving factor detector that is built into the same semiconductor device and is used to determine the energy-saving transition factor that has occurred in the system device, a bus that transmits data between the internal elements of the semiconductor device, and a bus that is provided outside the semiconductor device. When the second storage means for storing the program data executed by the CPU is provided and the energy saving factor detection unit detects the energy saving transition factor, the CPU moves from the second storage means to the first storage means. The predetermined energy-saving mode processing program data is transferred via the bus, the execution environment is switched from the second storage means to the first storage means, the system device shifts to the execution state of the energy-saving mode processing program, and the system unit is put into the energy-saving mode. It is a transition to.

また、前記第1記憶手段は、通常時は前記CPUがアクセスしないアドレス領域が割り当てられているものである。また、前記省エネモード処理プログラムデータは、前記第2記憶手段に記憶されているプログラムデータの一部である。 Further, the first storage means is allocated an address area that is not normally accessed by the CPU. Further, the energy saving mode processing program data is a part of the program data stored in the second storage means.

JP11111568A 1999-04-20 1999-04-20 System device Pending JP2000307779A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11111568A JP2000307779A (en) 1999-04-20 1999-04-20 System device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11111568A JP2000307779A (en) 1999-04-20 1999-04-20 System device

Publications (2)

Publication Number Publication Date
JP2000307779A JP2000307779A (en) 2000-11-02
JP2000307779A5 true JP2000307779A5 (en) 2006-03-02

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005262586A (en) * 2004-03-17 2005-09-29 Kyocera Mita Corp Image forming apparatus
JP2006015700A (en) * 2004-07-05 2006-01-19 Canon Inc Image formation device and controlling method for this device

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