JP3784057B2 - Computer device, computer device, external connection device, power supply method, program - Google Patents

Description

【００２６】
ここで、例えばピンＰ３〜Ｐ１８は、双方向のデータ通信に用いられるデータ信号線であり、図１に示すData Busに対応する。また、ピンＰ１〜Ｐ２、ピンＰ２１〜Ｐ４０（Ｐ２０を除く）及びピンＰ４４は、ＰＣ本体１０側（ホスト側）あるいはＨＤＤ２０側（デバイス側）から制御用通信を行うための制御信号線であり、図１に示すControl Lineに対応する。更に、ピンＰ４１は、ＰＣ本体１０からＨＤＤ２０に対して電圧を供給するロジック（Logic）電源線であり、図１に示すLogicに対応する。更にまた、ピンＰ４２は、ＰＣ本体１０からＨＤＤ２０に対して電圧を供給するモータ（Motor）電源線であり、図１に示すMotorに対応する。尚、Ｐ２０は誤装着防止用のキーピンとなっている。
【００２７】
図４は、ＰＣ本体１０の給電動作に関する処理を説明するフローチャートである。尚、このＰＣ本体１０では、初期段階において、３．３Ｖ給電スイッチ１６及び５Ｖ給電スイッチ１７が、共にオフに設定されているものとする。
ＰＣ本体１０の電源がオンとなると（ステップＳ１０１）、５Ｖ給電スイッチ１７をオンに設定し（ステップＳ１０２）、次に、Ｉ／Ｏコントローラ１３を介してＨＤＤ２０に向けてハードウェアリセット信号を送信する（ステップＳ１０３）。このハードウェアリセット信号の送信は、Ｉ／Ｏコントローラ１３が、コネクタ３０ａのピンＰ１（RESET-）をネゲートすることによって行われる。
【００２８】
そして、ハードウェアリセット信号を送信した直後、Ｉ／Ｏコントローラ１３がＨＤＤ２０のステータスレジスタ（Status Resister）にアクセスし、ＢＳＹが１に設定されているか否かを確認する（ステップＳ１０４）。ここで、ＢＳＹが１に設定されるのは、後述するように、３．３Ｖ出力装置２３及びモータドライバ２６に給電が正常に行われている場合のみである。このステータスレジスタのアドレス割り当て（コネクタ３０のピン番号、アサート及びネゲートの関係）を表２に、また、ステータスレジスタ中のＢＳＹを含むビットを表３に示す。尚、表２において、Ａはアサート、Ｎはネゲートを意味している。また表３におけるビット４、５は、コマンドの違いでビット定義が異なるビット（符号♯で示す）である。
【００２９】
【表２】

【００３０】
【表３】

【００３１】
そして、ＨＤＤ２０のステータスレジスタのＢＳＹが１であった場合には、ＨＤＤ２０の３．３Ｖ出力装置２３及びモータドライバ２６（すなわち、ＭＰＵ２１やＩ／Ｏコントローラ２２などの電子系回路及びスピンドルモータ２４やＶＣＭ２５などの電力系回路）への給電が正常に行われているものと判断され、通常動作を行う（ステップＳ１０５）。一方、ＢＳＹが０であった場合には、ＨＤＤ２０への給電が正常に行われていないものと判断され、次に３．３Ｖ給電スイッチ１６をオンに設定する（ステップＳ１０６）。このとき、５Ｖ給電スイッチ１７は既にオンとなっているため、ＰＣ本体１０からＨＤＤ２０に対し、ピンＰ４２を介してＤＣ５Ｖのモータ電圧が印加されるのに加え、ピンＰ４１を介してＤＣ３．３Ｖのロジック電圧が印加されることになる。次に、ＰＣ本体１０からＨＤＤ２０に対し、再度ハードウェアリセット信号が送信される（ステップＳ１０７）。
【００３２】
そして、ハードウェアリセット信号が送信された直後、ＨＤＤ２０のステータスレジスタ（Status Resister）のＢＳＹが１となっているか否かが再び確認される（ステップＳ１０８）。ここで、ＢＳＹが１であった場合には、ＨＤＤ２０への給電が正常に行われているものと判断され、通常動作を行う（ステップＳ１０５）。一方、ＢＳＹが０であった場合には、ＨＤＤ２０が装着されていないものと判断し（ステップＳ１０９）、一連のプロセスを終了する。
【００３３】
また、図５は、ＰＣ本体１０に接続されたＨＤＤ２０の受電動作に関する処理を説明するフローチャートである。
ＨＤＤ２０では、まず、ＰＣ本体１０からモータドライバ２６にモータ電圧（ＤＣ５Ｖ）が供給されているか否かが判断される（ステップＳ２０１）。ここで、モータドライバ２６にモータ電圧が供給されている場合には、次にＰＣ本体１０から３．３Ｖ出力装置２３にロジック電圧（ＤＣ５ＶまたはＤＣ３．３Ｖ）が供給されているか否かが判断され（ステップＳ２０２）、モータドライバ２６にモータ電圧が供給されていない場合には、ステップＳ２０１に戻ってモータ電圧の供給を待つ。
【００３４】
そして、ステップＳ２０２において、３．３Ｖ出力装置２３にロジック電圧が供給されている場合には、次に、３．３Ｖ出力装置２３によってＤＣ３．３Ｖのロジック駆動電圧が生成される（ステップＳ２０３）。その後、ＰＣ本体１０からハードウェアリセット信号を受信したか否かが判断され（ステップＳ２０４）、ハードウェアリセット信号を受信した場合には、Ｉ／Ｏコントローラ２２によってステータスレジスタのＢＳＹを１に設定して（ステップＳ２０５）、処理を終了し、ハードウェアリセット信号を受信しない場合には、ステップＳ２０４に戻ってハードウェアリセット信号の受信を待つ。ここで３．３Ｖ出力装置２３で許容されるロジック電圧は５Ｖ±５％または３．３Ｖ±５％、モータドライバ２６で許容されるモータ電圧は５Ｖ±５％である。
【００３５】
次に、図６に示すフローチャートを参照しながら、３．３Ｖ出力装置２３によるＤＣ３．３Ｖのロジック駆動電圧の生成プロセスを説明する。
まず、電圧検出装置４２によって入力端４１からロジック電圧の印加が検出されたか否かが判断され（ステップＳ３０１）、ロジック電圧の印加が検出された場合は、次に、印加されたロジック電圧がＤＣ５Ｖ±５％の範囲内にあるか否かが判断される（ステップＳ３０２）。尚、ステップＳ３０１においてロジック電圧が検出されなかった場合は、ステップＳ３０１に戻って処理を続行する。
【００３６】
ここで、電圧検出装置４２によって、入力されたロジック電圧がＤＣ５Ｖ±５％の範囲内にあると判断された場合は、入力端４１と出力端４５とが電圧変換装置４３を介して接続されるように切換スイッチ４４が切り換えられる（ステップＳ３０３）。これにより、出力端４５からＭＰＵ２１及びＩ／Ｏコントローラ２２に電圧変換されたＤＣ３．３Ｖのロジック電圧が供給され（ステップＳ３０４）、一連のプロセスを終了する。
一方、電圧検出装置４２によって、印加されたロジック電圧がＤＣ５Ｖ±５％の範囲内にないと判断された場合は、次に、このロジック電圧がＤＣ３．３Ｖ±５％の範囲内にあるか否かが判断される（ステップＳ３０５）。
【００３７】
ここで、電圧検出装置４２によって、入力されたロジック電圧がＤＣ３．３Ｖ±５％の範囲内にあると判断された場合は、入力端４１と出力端４５とが直接接続されるように切換スイッチ４４が切り換えられる（ステップＳ３０６）。これにより、出力端４５からＭＰＵ２１及びＩ／Ｏコントローラ２２に変換されないＤＣ３．３Ｖのロジック駆動電圧が供給され（ステップＳ３０４）、一連のプロセスを終了する。また、電圧検出装置４２によって、印加されたロジック電圧がＤＣ３．３Ｖ±５％の範囲内にないと判断された場合は、ステップＳ３０１に戻って処理を続行する。
【００３８】
以上、ＰＣ本体１０の給電動作及びＨＤＤ２０の受電動作について個別に説明を行ったが、次に、本実施の形態にかかるノートブック型ＰＣ１全体の動作について説明する。ここで、図７は、ＰＣ本体１０にＨＤＤ２０を装着したノートブック型ＰＣ１の給電動作を説明するタイミングチャートである。
まず、時刻T0においてＰＣ本体１０の電源がオンに設定されると、次に、時刻T1においてＰＣ本体１０の５Ｖ給電スイッチ１７がオンに設定され、これによりＨＤＤ２０のモータドライバ２６にモータ電圧（ＤＣ５Ｖ）が給電される。尚、このとき、ＰＣ本体１０の３．３Ｖ給電スイッチ１６はオフのままであるため、ＨＤＤ２０の３．３Ｖ出力装置２３に入力されるロジック電圧は０Ｖである。
【００３９】
そして、時刻T2においてＰＣ本体１０のＩ／Ｏコントローラ１３を介してＨＤＤ２０に向けてハードウェアリセット信号が送信され、これに続いてＩ／Ｏコントローラ１３がＨＤＤ２０のステータスレジスタにアクセスする。この時点では、モータドライバ２６（及びこれに接続されるスピンドルモータ２４やＶＣＭ２５）への給電が行われているものの、３．３Ｖ出力装置２３（及びこれに接続されるＭＰＵ２１やＩ／Ｏコントローラ２２）には給電が行われていないため、ステータスレジスタのＢＳＹは０のままとなる。ステータスレジスタのＢＳＹが０であることから、次に、時刻T3においてＰＣ本体１０の３．３Ｖ給電スイッチ１６がオンに設定される。これにより、ＨＤＤ２０の３．３Ｖ出力装置２３にロジック電圧（ＤＣ３．３Ｖ）が給電される。尚、このとき、ＰＣ本体１０の５Ｖ給電スイッチ１７は既にオンとなっているため、モータドライバ２６（及びこれに接続されるスピンドルモータ２４やＶＣＭ２５）への給電が行われるのに加え、３．３Ｖ出力装置２３（及びこれに接続されるＭＰＵ２１やＩ／Ｏコントローラ２２）への給電が行われることとなる。尚、本実施の形態では、供給されるロジック電圧がＤＣ３．３Ｖであるため、３．３Ｖ出力装置２３においてこのロジック電圧を降圧させずにそのままロジック駆動電圧として供給することとなる。
【００４０】
そして、時刻T4においてＰＣ本体１０のＩ／Ｏコントローラ１３を介してＨＤＤ２０に向けて再度ハードウェアリセット信号が送信され、これに続いてＩ／Ｏコントローラ１３がＨＤＤ２０のステータスレジスタにアクセスする。このとき、モータドライバ２６（及びこれに接続されるスピンドルモータ２４やＶＣＭ２５）、及び、３．３Ｖ出力装置２３（及びこれに接続されるＭＰＵ２１やＩ／Ｏコントローラ２２）に給電が行われているため、ＨＤＤ２０でハードウェアリセット信号を受信すると、ステータスレジスタのＢＳＹが１に設定される。ステータスレジスタのＢＳＹが１であることから、通常動作が行われることになる。
【００４１】
以上説明したように、本実施の形態では、ＰＣ本体１０の５Ｖ電源１５よりスピンドルモータ２４やＶＣＭ２５用の電圧（ＤＣ５Ｖ）を供給し、また、ＰＣ本体１０の３．３Ｖ電源１４よりＭＰＵ２１やＩ／Ｏコントローラ２２用の電圧（ＤＣ３．３Ｖ）を供給しているので、ＭＰＵ２１やＩ／Ｏコントローラ２２用にＤＣ５Ｖの電圧が印加される従来のタイプと比較して、電圧を降下させる必要がなく、無駄な消費電力の増大を抑制することができる。
また、ＰＣ本体１０より供給されたＤＣ３．３Ｖの電圧は、３．３Ｖ出力装置２３で電圧変換されずにＭＰＵ２１やＩ／Ｏコントローラ２２に供給されるので、電圧不足によりこれらＭＰＵ２１やＩ／Ｏコントローラ２２が動作不良を起こすという懸念も解消される。
【００４２】
―実施の形態２―
図８は、本発明が適用された実施の形態２に係るノートブック型ＰＣ１を示す図である。本実施の形態にかかるノートブック型ＰＣ１において、ＰＣ本体１０は実施の形態１と同じであるが、このＰＣ本体１０に接続されるＨＤＤ２０は、実施の形態１とは異なり、従来から用いられているタイプのものである。尚、本実施の形態において、実施の形態１と同様のものについては同じ符号を付し、その詳細な説明を省略する。
【００４３】
本実施の形態におけるＨＤＤ２０は、実施の形態１で用いられていた３．３Ｖ出力装置２３に代えて、ＤＣ５Ｖのロジック電圧を３．３Ｖの出力電圧に降圧させる機能のみを有する降圧装置２７を具備している。また、ＨＤＤ２０内において、ピンＰ４１に接続されるロジック電源線及びピンＰ４２に接続されるモータ電源線が、接続線２８によって接続されるようになっている。このように、本実施の形態にかかるＨＤＤ２０（従来型のハードディスクドライブ）では、ピンＰ４１あるいはピンＰ４２のいずれか一方にＤＣ５Ｖを印加することにより、モータ電圧及びロジック電圧を同時に印加することが可能になっている。
【００４４】
次に、本実施の形態にかかるノートブック型ＰＣ１全体の動作について説明する。ここで、図９は、ＰＣ本体１０にＨＤＤ２０を装着したノートブック型ＰＣ１の給電動作を説明するタイミングチャートである。
まず、時刻T0においてＰＣ本体１０の電源がオンに設定されると、次に、時刻T1においてＰＣ本体１０の５Ｖ給電スイッチ１７がオンに設定され、これによりＨＤＤ２０のモータドライバ２６にモータ電圧（ＤＣ５Ｖ）が給電される。そして、本実施の形態では、接続線２８が設けられているため、ＨＤＤ２０の降圧装置２７にもロジック電圧（ＤＣ５Ｖ）が給電されることになる。本実施の形態では、供給されるロジック電圧がＤＣ５Ｖであるため、降圧装置２７においてこのロジック電圧を降圧させてＤＣ３．３Ｖのロジック駆動電圧として供給することになる。
【００４５】
そして、時刻T2においてＰＣ本体１０のＩ／Ｏコントローラ１３を介してＨＤＤ２０に向けてハードウェアリセット信号が送信され、これに続いてＩ／Ｏコントローラ１３がＨＤＤ２０のステータスレジスタにアクセスする。本実施の形態では、この時点で既に、モータドライバ２６（及びこれに接続されるスピンドルモータ２４やＶＣＭ２５）、及び、降圧装置２７（及びこれに接続されるＭＰＵ２１やＩ／Ｏコントローラ２２）に給電が行われているため、ＨＤＤ２０でハードウェアリセット信号を受信すると、ステータスレジスタのＢＳＹが１に設定される。そして、ステータスレジスタのＢＳＹが１となっているため、通常動作が行われることになる。
【００４６】
以上説明したように、ＰＣ本体１０に従来のＨＤＤ２０を装着した場合には、ＰＣ本体１０の５Ｖ電源１５よりスピンドルモータ２４やＶＣＭ２５用の電圧（ＤＣ５Ｖ）を供給し、また、ＭＰＵ２１やＩ／Ｏコントローラ２２用の電圧（ＤＣ５Ｖ）を降圧装置２７を介して供給することが可能となるので、互換性を保つことが可能になる。
【００４７】
―実施の形態３―
図１０は、本発明が適用された実施の形態３に係るノートブック型ＰＣ１を示す図である。本実施の形態にかかるノートブック型ＰＣ１において、ＨＤＤ２０は実施の形態１と同じであるが、このＨＤＤ２０が接続されるＰＣ本体１０は、実施の形態１とは異なり、従来から用いられているタイプのものである。尚、本実施の形態において、実施の形態１と同様のものについては同じ符号を付し、その詳細な説明を省略する。
【００４８】
本実施の形態における従来のＰＣ本体１０は、実施の形態１で用いられていた３．３Ｖ電源１４を有しておらず、５Ｖ電源１５のみを具備している。また、これに対応して、３．３Ｖ給電スイッチ１６は取り付けられておらず、５Ｖ給電スイッチ１７のみが取り付けられている。このように、本実施の形態にかかるＰＣ本体１０（従来型のパーソナルコンピュータ本体）では、この５Ｖ給電スイッチ１７をオンに設定することにより、ＨＤＤ２０に対してロジック電圧及びモータ電圧を同時に供給することが可能となっている。
【００４９】
次に、本実施の形態にかかるノートブック型ＰＣ１全体の動作について説明する。ここで、図１１は、ＰＣ本体１０にＨＤＤ２０を装着したノートブック型ＰＣ１の給電動作を説明するタイミングチャートである。
まず、時刻T0においてＰＣ本体１０の電源がオンに設定されると、次に、時刻T1においてＰＣ本体１０の５Ｖ給電スイッチ１７がオンに設定され、これにより、ＨＤＤ２０の３．３Ｖ出力装置２３にロジック電圧（ＤＣ５Ｖ）が給電されると共に、モータドライバ２６にモータ電圧（ＤＣ５Ｖ）が給電される。そして、本実施の形態では、供給されるロジック電圧がＤＣ５Ｖであるため、３．３Ｖ出力装置２３の電圧変換装置４３によってこのロジック電圧を降圧させてＤＣ３．３Ｖのロジック駆動電圧として供給することになる。
【００５０】
そして、時刻T2においてＰＣ本体１０のＩ／Ｏコントローラ１３を介してＨＤＤ２０に向けてハードウェアリセット信号が送出され、これに続いてＩ／Ｏコントローラ１３がＨＤＤ２０のステータスレジスタにアクセスする。本実施の形態では、この時点で既に、モータドライバ２６（及びこれに接続されるスピンドルモータ２４やＶＣＭ２５）、及び、３．３Ｖ出力装置２３（及びこれに接続されるＭＰＵ２１やＩ／Ｏコントローラ２２）に給電が行われるため、ＨＤＤ２０でハードウェアリセット信号を受信すると、ステータスレジスタのＢＳＹが１に設定される。そして、ステータスレジスタのＢＳＹが１となっているため、通常動作が行われることになる。
【００５１】
以上説明したように、従来のＰＣ本体１０にＨＤＤ２０を装着した場合には、ＰＣ本体１０の５Ｖ電源１５よりスピンドルモータ２４やＶＣＭ２５用の電圧（ＤＣ５Ｖ）を供給し、また、ＭＰＵ２１やＩ／Ｏコントローラ２２用の電圧（ＤＣ５Ｖ）を３．３Ｖ出力装置２３に供給することが可能となり、この３．３Ｖ出力装置２３でＤＣ５Ｖの電圧をＤＣ３．３Ｖに変換してＭＰＵ２１やＩ／Ｏコントローラ２２に供給することができるため、互換性を保つことが可能になる。
【００５２】
【発明の効果】
以上説明したように、本発明によれば、無駄な消費電力を抑制すると共に、従来のシステム本体や外部接続機器との互換性を維持することができる。
【図面の簡単な説明】
【図１】 実施の形態１に係るノートブック型ＰＣの構成を示す説明図である。
【図２】 ３．３Ｖ出力装置の詳細を示す説明図である。
【図３】 ＡＴＡで規定される４４ピンコネクタを示す説明図である。
【図４】 ＰＣ本体の給電動作に関する処理を示すフローチャートである。
【図５】 ＰＣ本体に接続されたＨＤＤの受電動作に関する処理を示すフローチャートである。
【図６】 ３．３Ｖ処理装置における電圧変換・非変換処理を示すフローチャートである。
【図７】 実施の形態１に係るノートブック型ＰＣの給電動作を説明するためのタイミングチャートである。
【図８】 実施の形態２に係るノートブック型ＰＣの構成を示す説明図である。
【図９】 実施の形態２に係るノートブック型ＰＣの給電動作を説明するためのタイミングチャートである。
【図１０】 実施の形態３に係るノートブック型ＰＣの構成を示す説明図である。
【図１１】 実施の形態３に係るノートブック型ＰＣの給電動作を説明するためのタイミングチャートである。
【符号の説明】
１…ノートブック型パーソナルコンピュータ装置（ノートブック型ＰＣ）、１０…ＰＣ本体、１１…ＭＰＵ、１２…フラッシュメモリ、１３…Ｉ／Ｏコントローラ、１４…３．３Ｖ電源、１５…５Ｖ電源、１６…３．３Ｖ給電スイッチ、１７…５Ｖ給電スイッチ、１８…ネットワークインターフェース、１９…メインメモリ、２０…２．５インチハードディスクドライブ（ＨＤＤ）、２１…ＭＰＵ、２２…Ｉ／Ｏコントローラ、２３…３．３Ｖ出力装置、２４…スピンドルモータ、２５…ＶＣＭ、２６…モータドライバ、２７…降圧装置、２８…接続線、３０…コネクタ、４１…入力端、４２…電圧検出装置、４３…電圧変換装置、４４…切換スイッチ、４５…出力端[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a computer apparatus or the like that is used by connecting an external connection device such as a hard disk drive to a system main body such as a notebook personal computer (notebook PC), and in particular, from the system main body to the external connection device. The present invention relates to a computer device that supplies power for operation.
[0002]
[Prior art]
In recent years, portable notebook PCs (Personal Computers) have come to be widely used. In this type of notebook PC, a 2.5-inch hard disk drive (HDD) equipped with a 2.5-inch magnetic disk is widely used from the viewpoint of miniaturization. These notebook PC main body and 2.5 inch HDD are connected using a 44-pin connector whose specification is defined by ATA (At Attachment).
[0003]
In this type of notebook PC, a logic voltage (DC5V) is supplied from the notebook PC main body to the 2.5-inch HDD via the pin 41 of the 44-pin connector, and the pin 42 is It is stipulated that the motor voltage (DC5V) is supplied via Among these, the logic voltage is mainly supplied to electronic circuits such as an MPU (Micro Processing Unit) and I / O interface built in the 2.5-inch HDD, and the motor voltage is built-in to the 2.5-inch HDD. The power supply circuit is mainly supplied to a spindle motor for rotating the magnetic disk and a VCM (Voice Coil Motor) for swinging the magnetic head.
[0004]
[Problems to be solved by the invention]
By the way, due to recent advances in semiconductor technology, the operating voltage of electronic circuits including MPUs has been lowered. However, as described above, since the logic voltage supplied to the 2.5-inch HDD is defined as DC5V, the latest 2.5-inch HDD uses the supplied logic voltage (DC5V) as the actual drive voltage (DC5V). For example, a step-down device that converts to DC 3.3V is provided, and a voltage converted to DC 3.3V by this step-down device is supplied to the electronic circuit. The operating voltage of the power system circuit including the spindle motor and the VCM is the same as the supplied motor voltage (DC5V).
[0005]
However, there has been a technical problem in that wasteful power consumption is increased by converting the voltage from the logic voltage (DC5V) to the actual drive voltage (DC3.3V) in the 2.5-inch HDD.
As one method for solving such a technical problem, it is conceivable to lower the logic voltage supplied from the notebook PC main body in accordance with the actual drive voltage (for example, DC 3.3 V). . According to this, an increase in useless power consumption is suppressed, and there is no need to provide a step-down device in the 2.5-inch HDD.
[0006]
However, if the logic voltage supplied from the notebook PC is DC 3.3V, when a conventional 2.5-inch HDD (operating with a logic voltage of DC 5V) is mounted on the notebook PC, There is a problem that the electronic system circuit of the conventional 2.5-inch HDD becomes inoperable due to insufficient voltage. On the other hand, when a 2.5-inch HDD that does not have a step-down device and operates at a low voltage (for example, DC 3.3 V) is mounted on a conventional notebook PC (a logic voltage to be supplied is DC 5 V), this 2.5 There is a possibility that the electronic system circuit of the inch HDD may be destroyed by an excessive voltage. That is, there has been a technical problem that compatibility with conventional devices cannot be maintained only by reducing the logic voltage supplied from the notebook PC.
[0007]
The present invention solves the above technical problems, and its object is to suppress wasteful power consumption and maintain compatibility with conventional system bodies and externally connected devices. is there.
[0008]
[Means for Solving the Problems]
For this purpose, the computer apparatus of the present invention operates with a first voltage and a first voltage supplied from the system main body, which can supply a first voltage and a second voltage lower than the first voltage. An external connection device having a first operation unit and a second operation unit that operates at a second voltage supplied from the system body, and the system body supplies the first voltage to the external connection device. A second voltage is further supplied to the externally connected device based on the obtained operating state of the second operating unit.
[0009]
In the computer device of the present invention, after supplying the first voltage, the system body sends a hardware reset signal to the external connection device, detects the setting state of the BSY bit in the status register of the external connection device, and detects the second state. On the other hand, in the externally connected device, the first operating unit and the second operating unit operate together, and the hardware transmitted from the system main body is used. It may further include a bit setting unit that sets the BSY bit of the status register to 1 when the wear reset signal is received.
[0010]
In the computer device of the present invention, when the second voltage is supplied to the second operation unit, the external connection device supplies the second voltage to the second operation unit without converting the second voltage. In addition, when the first voltage is supplied to the second operation unit, the first operation unit further includes a supply unit that converts the first voltage into the second voltage and supplies the second voltage to the second operation unit. The external connection device may be a hard disk drive connected to the system body via an ATA (AT Attachment) 44-pin connector. Examples of externally connected devices include hard disk drives and disk drives such as CD-ROM, DVD-ROM, and MO. The first voltage can be set to DC5V ± 5%, and the second voltage can be set to DC3.3V ± 5%.
[0011]
Further, the present invention is a computer device that supplies an operating voltage to an externally connected device to be connected, the first voltage supplying means capable of supplying the first operating voltage to the externally connected device, A second voltage supply means capable of supplying a second operating voltage lower than the first operating voltage to the connected device; and a first operating voltage for the externally connected device by the first voltage supplying means. Means for confirming the operating state of the externally connected device after being supplied, and when the confirming means confirms that the externally connected device is not operating, the first voltage supply means It can be grasped as a computer device comprising supply execution means for executing supply of the operation voltage. In this computer apparatus, the confirmation unit can detect the setting state of the BSY bit in the status register of the external connection apparatus after transmitting a hardware reset signal to the external connection apparatus.
[0012]
Furthermore, the present invention is an externally connected device that receives supply of operating voltage from a connected computer device, the first operating unit operating at the first operating voltage, and the first operating voltage than the first operating voltage. When the second voltage is supplied to the second operating unit that operates at a low second voltage and the second operating unit, the second voltage is not converted to the second operating unit. An external device including a supply unit that converts the second voltage to the first voltage and supplies the second voltage to the second operation unit when the first voltage is supplied to the second operation unit. It can be grasped as a connected device.
[0013]
In this external connection device, the supply unit includes a voltage detection unit that detects whether the voltage supplied to the second operation unit is the first voltage or the second voltage, and the first voltage. A voltage conversion unit that converts to a second voltage; and a switching unit that switches whether or not to perform voltage conversion by the voltage conversion unit based on a voltage detection result of the voltage detection unit. And a bit setting unit for setting the BSY bit of the status register to 1 when the first operation unit and the second operation unit operate together and receive a hardware reset signal transmitted from the computer device. Can be characterized.
[0014]
Further, the present invention provides a computer with a function of supplying a first voltage to an externally connected device, a function of confirming the operation of the externally connected device to which the first voltage is supplied, and the externally connected device is not operating. In this case, it can be grasped as a program for realizing a function of supplying a second voltage lower than the first voltage to the external connection device. In this program, the function to confirm the operation of the externally connected device supplied with the first voltage is to send a hardware reset signal to the externally connected device and detect the setting state of the BSY bit in the status register of the externally connected device It is preferable to do.
[0015]
Furthermore, the present invention provides a computer with a function of confirming the supply of the first voltage to the first operating unit operating at the first voltage, and a second operating at a second voltage lower than the first voltage. A function of confirming the supply of the second voltage to the operation unit of the first, and the supply of the first voltage to the first operation unit and the supply of the second voltage to the second operation unit are confirmed. It can be grasped as a program that realizes a function of generating a signal indicating that the operation unit and the second operation unit are operable. In addition, when the voltage supplied to the second operating unit is the first voltage or the second voltage, and when the second voltage is supplied to the second operating unit When the second voltage is supplied to the second operating unit without being converted, and the first voltage is supplied to the second operating unit, the first voltage is changed to the second voltage to change the second voltage. It is preferable to further include a function of supplying to the operation unit.
[0016]
A program to be executed by these computers may be stored in a storage medium readable by the computer. As this storage medium, for example, a CD-ROM medium or the like is applicable, and a program is read by a CD-ROM reader in a computer, and the program is stored in various memories such as a hard disk in a computer and executed. Conceivable. Moreover, the form with which these programs are provided with a notebook PC or a portable terminal via a network by the program transmission apparatus can be considered, for example. Such a program transmission device only needs to include a memory for storing the program and a program transmission means for providing the program via a network.
[0017]
The present invention can also be understood as a method invention in which each function in the program invention described above is expressed in steps.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.
—Embodiment 1—
FIG. 1 is a diagram showing a notebook personal computer device (notebook type PC) 1 according to Embodiment 1 to which the present invention is applied. The notebook PC 1 includes a PC main body 10 as a system main body and a 2.5-inch hard disk drive (HDD) 20 as an externally connected device connected to the PC main body 10. Further, the PC main body 10 and the HDD 20 are each provided with a connector 30 for connection to each other (specifically, a connector 30a on the PC main body 10 side and a connector 30b on the HDD 20 side).
[0019]
In the PC main body 10, the MPU 11 functions as the brain of the entire notebook PC 1, and executes various programs under the control of an OS (Operating System). The flash memory 12 stores a BIOS (Basic Input / Output System) for controlling externally connected devices such as a disk drive, a keyboard, and a video card connected to the PC main body 10. Further, the I / O controller 13 controls communication with a connected externally connected device (for example, the HDD 20) based on a command read from the flash memory 12 and operating on the MPU 11. Further, the PC main body 10 has a 3.3V power supply 14 for supplying a constant voltage of 3.3V DC (corresponding to the second voltage) to the external connection device, and a constant DC5V to the external connection device. And a 5V power supply 15 for supplying a voltage (corresponding to the first voltage).
[0020]
Also, the 3.3V power supply 14 is connected to a 3.3V power supply switch 16 for setting whether or not to apply a voltage of DC3.3V to the external connection device, and the 5V power supply 15 is connected to the external connection device. A 5V power supply switch 17 is connected to set whether or not to apply a DC5V voltage. The PC main body 10 further includes a network interface 18 for communicating with an external network and downloading various programs, and a main memory 19 in which various programs executed by the MPU 11 are stored.
[0021]
On the other hand, in the HDD 20, the MPU 21 functions as the brain of the HDD 20, and interprets and executes various programs stored in a memory (not shown) based on instructions received from the PC main body 10 via the I / O controller 22. The I / O controller 22 has a function as an interface of an HDC (Hard Disc Controller), that is, the HDD 20. Further, the MPU 21 and the I / O controller 22 are linked to control the HDD 20.
[0022]
Further, in the present embodiment, the MPU 21 and the I / O controller 22 are devices (corresponding to the second operation unit) that operate at a relatively low rated voltage of DC 3.3V, and the MPU 21 and the I / O controller 22 Is connected to a 3.3 V output device 23 as a supply unit that supplies a logic drive voltage of DC 3.3 V based on a logic voltage supplied from the PC main body 10. Further, the HDD 20 includes a spindle motor 24 for rotationally driving a magnetic disk (not shown) and an actuator (not shown) that swings a magnetic head (not shown) for reading and writing data on the magnetic disk. ) And a VCM (Voice Coil Motor) 25 attached thereto. Here, the spindle motor 24 and the VCM 25 are devices (corresponding to the first operation unit) that operate at a relatively high rated voltage of DC 5 V. The spindle motor 24 and the VCM 25 include a motor ( A motor driver 26 for controlling the driving of the spindle motor 24 and the VCM 25 based on the voltage is connected.
Each of these components and the connector 30b are attached to the same casing, and the entire casing is connected to the PC main body 10.
[0023]
FIG. 2 is a diagram showing details of the 3.3V output device 23 provided in the HDD 20. The 3.3V output device 23 includes a voltage detection device 42 as a voltage detection unit that detects whether the input voltage (logic voltage) input from the input terminal 41 is DC5V or DC3.3V, and an input of DC5V. A voltage converter 43 as a voltage converter that converts the voltage into an output voltage of DC 3.3V, and the input terminal 41 and the output terminal 45 are connected via the voltage converter 43 based on the detection result of the voltage detector 42. Or a changeover switch 44 as a changeover portion for switching between direct connection and direct connection.
[0024]
FIG. 3 is a diagram showing details of the connectors 30 (30a, 30b) attached to the PC main body 10 and the HDD 20, respectively. The basic configuration of the connector 30 is a 44-pin connector whose specifications are defined by ATA (AT Attachment), and pins PA to PF that can be used in the vendor definition (however, the pins PE and PF are key pins for preventing erroneous mounting) It has 50 pins including Key Pin)). Here, Table 1 shows the specifications of the signal lines defined by the ATA (relationship between each pin abbreviation (Signal Name) and pin number (Connector contact)).
[0025]
[Table 1]

[0026]
Here, for example, the pins P3 to P18 are data signal lines used for bidirectional data communication, and correspond to the Data Bus shown in FIG. Pins P1 to P2, pins P21 to P40 (excluding P20) and pin P44 are control signal lines for performing control communication from the PC main body 10 side (host side) or HDD 20 side (device side). This corresponds to the Control Line shown in FIG. Further, the pin P41 is a logic power line for supplying a voltage from the PC main body 10 to the HDD 20, and corresponds to the logic shown in FIG. Furthermore, the pin P42 is a motor power line that supplies a voltage from the PC body 10 to the HDD 20, and corresponds to the motor shown in FIG. P20 is a key pin for preventing erroneous mounting.
[0027]
FIG. 4 is a flowchart for explaining processing related to the power feeding operation of the PC main body 10. In the PC main body 10, it is assumed that both the 3.3V power supply switch 16 and the 5V power supply switch 17 are set to OFF in the initial stage.
When the power of the PC main body 10 is turned on (step S101), the 5V power supply switch 17 is set to on (step S102), and then a hardware reset signal is transmitted to the HDD 20 via the I / O controller 13. (Step S103). The hardware reset signal is transmitted by the I / O controller 13 negating the pin P1 (RESET−) of the connector 30a.
[0028]
Immediately after transmitting the hardware reset signal, the I / O controller 13 accesses the status register (Status Register) of the HDD 20 to check whether BSY is set to 1 (step S104). Here, BSY is set to 1 only when power is normally supplied to the 3.3V output device 23 and the motor driver 26, as will be described later. Table 2 shows the address assignment of the status register (relationship between pin number of connector 30, assertion and negation), and Table 3 shows bits including BSY in the status register. In Table 2, A means assert and N means negate. In addition, bits 4 and 5 in Table 3 are bits (indicated by symbol #) having different bit definitions depending on the command.
[0029]
[Table 2]

[0030]
[Table 3]

[0031]
When the BSY of the status register of the HDD 20 is 1, the 3.3V output device 23 and the motor driver 26 of the HDD 20 (that is, electronic circuits such as the MPU 21 and the I / O controller 22 and the spindle motor 24 and the VCM 25). It is determined that the power is normally supplied to the power system circuit, and the like, and normal operation is performed (step S105). On the other hand, if BSY is 0, it is determined that power supply to the HDD 20 is not normally performed, and then the 3.3V power supply switch 16 is set to ON (step S106). At this time, since the 5V power supply switch 17 is already turned on, a DC5V motor voltage is applied from the PC main body 10 to the HDD 20 via the pin P42, and in addition, a DC 3.3V voltage is applied via the pin P41. A logic voltage will be applied. Next, a hardware reset signal is transmitted again from the PC body 10 to the HDD 20 (step S107).
[0032]
Then, immediately after the hardware reset signal is transmitted, it is confirmed again whether BSY of the status register (Status Register) of the HDD 20 is 1 (step S108). Here, if BSY is 1, it is determined that the power supply to the HDD 20 is normally performed, and normal operation is performed (step S105). On the other hand, if BSY is 0, it is determined that the HDD 20 is not installed (step S109), and the series of processes is terminated.
[0033]
FIG. 5 is a flowchart for explaining processing related to the power receiving operation of the HDD 20 connected to the PC main body 10.
In the HDD 20, first, it is determined whether or not the motor voltage (DC5V) is supplied from the PC main body 10 to the motor driver 26 (step S201). Here, when the motor voltage is supplied to the motor driver 26, it is next determined whether or not the logic voltage (DC5V or DC3.3V) is supplied from the PC body 10 to the 3.3V output device 23. (Step S202) When the motor voltage is not supplied to the motor driver 26, the process returns to Step S201 to wait for the supply of the motor voltage.
[0034]
If a logic voltage is supplied to the 3.3V output device 23 in step S202, then a 3.3V DC logic drive voltage is generated by the 3.3V output device 23 (step S203). Thereafter, it is determined whether or not a hardware reset signal is received from the PC main body 10 (step S204). When the hardware reset signal is received, the I / O controller 22 sets BSY in the status register to 1. (Step S205), the process ends, and if the hardware reset signal is not received, the process returns to Step S204 to wait for the reception of the hardware reset signal. Here, the logic voltage allowed in the 3.3V output device 23 is 5V ± 5% or 3.3V ± 5%, and the motor voltage allowed in the motor driver 26 is 5V ± 5%.
[0035]
Next, a process for generating a logic drive voltage of DC 3.3V by the 3.3V output device 23 will be described with reference to a flowchart shown in FIG.
First, it is determined whether or not application of a logic voltage is detected from the input terminal 41 by the voltage detection device 42 (step S301). If application of a logic voltage is detected, then the applied logic voltage is DC5V. It is determined whether it is within a range of ± 5% (step S302). If no logic voltage is detected in step S301, the process returns to step S301 and continues.
[0036]
Here, when the voltage detection device 42 determines that the input logic voltage is within the range of DC5V ± 5%, the input terminal 41 and the output terminal 45 are connected via the voltage converter 43. Thus, the changeover switch 44 is changed over (step S303). As a result, a logic voltage of DC 3.3 V that has been subjected to voltage conversion is supplied from the output terminal 45 to the MPU 21 and the I / O controller 22 (step S304), and the series of processes is completed.
On the other hand, if the voltage detection device 42 determines that the applied logic voltage is not within the range of DC5V ± 5%, then whether or not the logic voltage is within the range of DC3.3V ± 5%. Is determined (step S305).
[0037]
Here, when the voltage detection device 42 determines that the input logic voltage is within the range of DC 3.3V ± 5%, the changeover switch so that the input terminal 41 and the output terminal 45 are directly connected. 44 is switched (step S306). As a result, a DC 3.3V logic drive voltage that is not converted from the output end 45 to the MPU 21 and the I / O controller 22 is supplied (step S304), and the series of processes ends. If the voltage detection device 42 determines that the applied logic voltage is not within the range of DC 3.3V ± 5%, the process returns to step S301 to continue the process.
[0038]
The power supply operation of the PC main body 10 and the power reception operation of the HDD 20 have been individually described above. Next, the operation of the entire notebook PC 1 according to the present embodiment will be described. Here, FIG. 7 is a timing chart for explaining the power feeding operation of the notebook PC 1 in which the HDD 20 is mounted on the PC main body 10.
First, when the power source of the PC main body 10 is set to ON at time T0, the 5V power supply switch 17 of the PC main body 10 is set to ON at time T1, thereby the motor voltage (DC5V DC) is applied to the motor driver 26 of the HDD 20. ) Is fed. At this time, since the 3.3V power supply switch 16 of the PC main body 10 remains off, the logic voltage input to the 3.3V output device 23 of the HDD 20 is 0V.
[0039]
At time T2, a hardware reset signal is transmitted to the HDD 20 via the I / O controller 13 of the PC main body 10, and subsequently, the I / O controller 13 accesses the status register of the HDD 20. At this time, power is supplied to the motor driver 26 (and the spindle motor 24 and VCM 25 connected thereto), but the 3.3V output device 23 (and the MPU 21 and I / O controller 22 connected thereto) are provided. ) Does not supply power, BSY of the status register remains 0. Since BSY of the status register is 0, the 3.3V power supply switch 16 of the PC main body 10 is set to ON at time T3. As a result, the logic voltage (DC 3.3 V) is supplied to the 3.3 V output device 23 of the HDD 20. At this time, since the 5V power supply switch 17 of the PC main body 10 is already turned on, power is supplied to the motor driver 26 (and the spindle motor 24 and VCM 25 connected thereto). Power is supplied to the 3V output device 23 (and the MPU 21 and the I / O controller 22 connected thereto). In the present embodiment, since the supplied logic voltage is DC 3.3V, the 3.3V output device 23 supplies the logic voltage as it is without stepping down the logic voltage.
[0040]
At time T4, a hardware reset signal is transmitted again to the HDD 20 via the I / O controller 13 of the PC body 10, and subsequently, the I / O controller 13 accesses the status register of the HDD 20. At this time, power is supplied to the motor driver 26 (and the spindle motor 24 and VCM 25 connected thereto) and the 3.3V output device 23 (and the MPU 21 and I / O controller 22 connected thereto). Therefore, when the hardware reset signal is received by the HDD 20, the BSY of the status register is set to 1. Since BSY of the status register is 1, normal operation is performed.
[0041]
As described above, in the present embodiment, the spindle motor 24 and the VCM 25 voltage (DC5V) are supplied from the 5V power supply 15 of the PC main body 10, and the MPU 21 and I are supplied from the 3.3V power supply 14 of the PC main body 10. Since the voltage (DC3.3V) for the / O controller 22 is supplied, there is no need to lower the voltage compared to the conventional type in which a DC5V voltage is applied to the MPU 21 or the I / O controller 22 Therefore, an increase in useless power consumption can be suppressed.
Also, the DC 3.3V voltage supplied from the PC body 10 is supplied to the MPU 21 and the I / O controller 22 without being converted by the 3.3V output device 23. The concern that the controller 22 malfunctions is also eliminated.
[0042]
-Embodiment 2-
FIG. 8 is a diagram showing a notebook PC 1 according to the second embodiment to which the present invention is applied. In the notebook PC 1 according to the present embodiment, the PC main body 10 is the same as that in the first embodiment. However, unlike the first embodiment, the HDD 20 connected to the PC main body 10 is conventionally used. It is of the type. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0043]
The HDD 20 according to the present embodiment includes a step-down device 27 having only a function of stepping down a DC5V logic voltage to an output voltage of 3.3V instead of the 3.3V output device 23 used in the first embodiment. is doing. In the HDD 20, a logic power line connected to the pin P 41 and a motor power line connected to the pin P 42 are connected by a connection line 28. Thus, in the HDD 20 (conventional hard disk drive) according to the present embodiment, it is possible to apply the motor voltage and the logic voltage simultaneously by applying DC 5 V to either the pin P41 or the pin P42. It has become.
[0044]
Next, the overall operation of the notebook PC 1 according to the present embodiment will be described. Here, FIG. 9 is a timing chart for explaining the power feeding operation of the notebook PC 1 in which the HDD 20 is mounted on the PC main body 10.
First, when the power source of the PC main body 10 is set to ON at time T0, the 5V power supply switch 17 of the PC main body 10 is set to ON at time T1, thereby the motor voltage (DC5V DC) is applied to the motor driver 26 of the HDD 20. ) Is fed. In this embodiment, since the connection line 28 is provided, the logic voltage (DC 5 V) is also supplied to the step-down device 27 of the HDD 20. In the present embodiment, since the supplied logic voltage is 5V DC, the voltage is reduced by the step-down device 27 and supplied as a logic drive voltage of DC 3.3V.
[0045]
At time T2, a hardware reset signal is transmitted to the HDD 20 via the I / O controller 13 of the PC main body 10, and subsequently, the I / O controller 13 accesses the status register of the HDD 20. In the present embodiment, power is already supplied to the motor driver 26 (and the spindle motor 24 and VCM 25 connected thereto) and the step-down device 27 (and the MPU 21 and I / O controller 22 connected thereto) already at this time. Therefore, when the HDD 20 receives the hardware reset signal, the status register BSY is set to 1. Since the status register BSY is 1, normal operation is performed.
[0046]
As described above, when the conventional HDD 20 is mounted on the PC main body 10, the spindle motor 24 and VCM 25 voltage (DC 5 V) is supplied from the 5 V power supply 15 of the PC main body 10, and the MPU 21 and I / O are also supplied. Since the voltage (DC 5V) for the controller 22 can be supplied via the step-down device 27, compatibility can be maintained.
[0047]
-Third embodiment-
FIG. 10 is a diagram showing a notebook PC 1 according to Embodiment 3 to which the present invention is applied. In the notebook PC 1 according to the present embodiment, the HDD 20 is the same as that of the first embodiment, but the PC main body 10 to which the HDD 20 is connected is different from the first embodiment and has been used conventionally. belongs to. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0048]
The conventional PC main body 10 in the present embodiment does not have the 3.3V power supply 14 used in the first embodiment, but includes only the 5V power supply 15. Correspondingly, the 3.3V power supply switch 16 is not attached, and only the 5V power supply switch 17 is attached. Thus, in the PC main body 10 (conventional personal computer main body) according to the present embodiment, the logic voltage and the motor voltage are simultaneously supplied to the HDD 20 by setting the 5V power supply switch 17 to ON. Is possible.
[0049]
Next, the overall operation of the notebook PC 1 according to the present embodiment will be described. Here, FIG. 11 is a timing chart for explaining the power feeding operation of the notebook PC 1 in which the HDD 20 is mounted on the PC main body 10.
First, when the power source of the PC main body 10 is set to ON at time T0, the 5V power supply switch 17 of the PC main body 10 is set to ON at time T1, thereby causing the 3.3V output device 23 of the HDD 20 to be turned on. The logic voltage (DC5V) is supplied, and the motor voltage (DC5V) is supplied to the motor driver 26. In this embodiment, since the supplied logic voltage is DC 5 V, the logic voltage is stepped down by the voltage converter 43 of the 3.3 V output device 23 and supplied as a logic drive voltage of DC 3.3 V. Become.
[0050]
At time T2, a hardware reset signal is sent to the HDD 20 via the I / O controller 13 of the PC main body 10, and subsequently, the I / O controller 13 accesses the status register of the HDD 20. In this embodiment, the motor driver 26 (and the spindle motor 24 and VCM 25 connected thereto) and the 3.3V output device 23 (and the MPU 21 and I / O controller 22 connected thereto) are already present at this point. Therefore, when the HDD 20 receives a hardware reset signal, the status register BSY is set to 1. Since the status register BSY is 1, normal operation is performed.
[0051]
As described above, when the HDD 20 is mounted on the conventional PC main body 10, the voltage (DC5V) for the spindle motor 24 and the VCM 25 is supplied from the 5V power source 15 of the PC main body 10, and the MPU 21 and the I / O are also supplied. It becomes possible to supply the voltage (DC5V) for the controller 22 to the 3.3V output device 23. The 3.3V output device 23 converts the DC5V voltage to DC3.3V and supplies it to the MPU 21 and the I / O controller 22. Since it can be supplied, compatibility can be maintained.
[0052]
【The invention's effect】
As described above, according to the present invention, it is possible to suppress wasteful power consumption and maintain compatibility with conventional system bodies and externally connected devices.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration of a notebook PC according to a first embodiment.
FIG. 2 is an explanatory diagram showing details of a 3.3V output device.
FIG. 3 is an explanatory view showing a 44-pin connector defined by ATA.
FIG. 4 is a flowchart showing processing relating to a power supply operation of the PC main body.
FIG. 5 is a flowchart showing a process related to a power receiving operation of an HDD connected to a PC main body.
FIG. 6 is a flowchart showing voltage conversion / non-conversion processing in the 3.3V processing apparatus.
7 is a timing chart for explaining a power supply operation of the notebook PC according to Embodiment 1. FIG.
FIG. 8 is an explanatory diagram showing a configuration of a notebook PC according to the second embodiment.
FIG. 9 is a timing chart for explaining a power feeding operation of the notebook PC according to the second embodiment.
FIG. 10 is an explanatory diagram showing a configuration of a notebook PC according to the third embodiment.
FIG. 11 is a timing chart for explaining a power feeding operation of the notebook PC according to the third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Notebook type personal computer apparatus (notebook type PC), 10 ... PC main body, 11 ... MPU, 12 ... Flash memory, 13 ... I / O controller, 14 ... 3.3V power supply, 15 ... 5V power supply, 16 ... 3.3V feed switch, 17 ... 5V feed switch, 18 ... network interface, 19 ... main memory, 20 ... 2.5 inch hard disk drive (HDD), 21 ... MPU, 22 ... I / O controller, 23 ... 3.3V Output device 24 ... Spindle motor 25 ... VCM 26 ... Motor driver 27 ... Step-down device 28 ... Connection line 30 ... Connector 41 ... Input end 42 ... Voltage detection device 43 ... Voltage conversion device 44 ... Changeover switch, 45 ... Output terminal

Claims (20)

A system body capable of supplying a first voltage and a second voltage lower than the first voltage;
An external connection device having a first operating unit that operates at the first voltage supplied from the system body and a second operating unit that operates at the second voltage supplied from the system body;
The system main body adds the second voltage to the external connection device in addition to the first voltage based on the operating state of the second operation unit obtained when the first voltage is supplied to the external connection device. The computer apparatus further comprising:   After supplying the first voltage, the system main body sends a hardware reset signal to the external connection device, detects the setting state of the BSY bit of the status register of the external connection device, and performs the second operation. The computer apparatus according to claim 1, wherein an operation state of the unit is confirmed. The external connection device is:
A bit setting unit that sets the BSY bit of the status register to 1 when the first operation unit and the second operation unit operate together and a hardware reset signal transmitted from the system main body is received. The computer apparatus according to claim 1, further comprising: The external connection device is:
When the second voltage is supplied to the second operating unit, the second voltage is supplied to the second operating unit without being converted, and the second operating unit is supplied to the second operating unit. 2. The apparatus according to claim 1, further comprising a supply unit that converts the first voltage into the second voltage and supplies the second voltage to the second operation unit when the first voltage is supplied. A computer device as described.   2. The computer apparatus according to claim 1, wherein the externally connected device is a hard disk drive connected to the system main body via an ATA (AT Attachment) 44 pin connector.   2. The computer apparatus according to claim 1, wherein the first voltage is DC5V ± 5%, and the second voltage is DC3.3V ± 5%. A computer device for supplying an operating voltage to a connected external device,
First voltage supply means capable of supplying a first operating voltage to the external connection device;
A second voltage supply means capable of supplying a second operating voltage lower than the first operating voltage to the external connection device;
Confirmation means for confirming the operating state of the externally connected device after the first operating voltage is supplied to the externally connected device by the first voltage supply means;
When the confirmation means confirms that the external connection device is not operating, the first voltage supply means causes the external connection device to supply the first operating voltage and the second voltage supply means. And a supply executing means for causing the externally connected equipment to supply the second operating voltage by the voltage supply means . The confirmation means includes
8. The computer apparatus according to claim 7, wherein after the hardware reset signal is transmitted to the external connection apparatus, the setting state of the BSY bit of the status register of the external connection apparatus is detected. An external connection device that receives operation voltage from a connected computer device,
A first operating part that operates at a first voltage ;
A second operating part that operates at a second voltage lower than the first voltage ;
When the first voltage is supplied to the first operating unit and the second voltage is supplied to the second operating unit, the second voltage is not converted. When the first voltage is supplied to the second operating unit and the first voltage is supplied to the first operating unit and the second operating unit, the second voltage is used as the first voltage. An external connection device comprising: a supply unit that converts the data into a second operation unit.   The supply unit is configured to detect whether the voltage supplied to the second operation unit is the first voltage or the second voltage, and the first voltage The voltage conversion part which converts into a 2nd voltage, The switching part which switches whether the voltage conversion by the said voltage conversion part is performed based on the voltage detection result of the said voltage detection part is provided, It is characterized by the above-mentioned. Externally connected equipment as described in   A bit setting unit for setting the BSY bit of the status register to 1 when the first operation unit and the second operation unit operate together and receive a hardware reset signal transmitted from the computer device; The external connection device according to claim 9, further comprising: Supplying a first voltage to the external connection device;
Confirming the operation of the externally connected device when the first voltage is supplied;
A step of further supplying a second voltage lower than the first voltage to the external connection device in addition to the first voltage when the external connection device is not operating due to the operation check of the external connection device; A power supply method comprising: Confirming the operation of the externally connected device when the first voltage is supplied,
The power feeding method according to claim 12, wherein a hardware reset signal is transmitted to the externally connected device, and a setting state of a BSY bit of a status register of the externally connected device is detected. A power supply method for supplying power to an external connection device including a first operation unit that operates at a first voltage and a second operation unit that operates at a second voltage lower than the first voltage,
Confirming the supply of the first voltage to the first operating unit ;
Confirming the supply of the second voltage to the second operating part ;
When the supply of the first voltage to the first operating unit and the supply of the second voltage to the second operating unit are confirmed, the first operating unit and the second operating unit are Generating a signal indicating that the power supply is operable. 15. The power supply according to claim 14, wherein the step of generating a signal indicating that the first operation unit and the second operation unit are operable sets a BSY bit of a status register to 1. Method. Checking whether the voltage supplied to the second operating unit is the first voltage or the second voltage;
When the second voltage is supplied to the second operating part, the second voltage is supplied to the second operating part without conversion, and the second operating part is supplied with the first voltage. The method according to claim 14, further comprising: converting the first voltage into the second voltage and supplying the second voltage to the second operation unit when the voltage is supplied. . On the computer,
The function of supplying the first voltage to the external connection device;
A function of confirming the operation of the externally connected device to which the first voltage is supplied;
A function of further supplying a second voltage lower than the first voltage to the external connection device in addition to the first voltage when the external connection device is not operating;
A program characterized by realizing. The function of confirming the operation of the externally connected device supplied with the first voltage, which is executed by the computer,
The program according to claim 17, wherein a hardware reset signal is transmitted to the externally connected device to detect a setting state of a BSY bit of a status register of the externally connected device. On the computer,
A function of confirming the supply of the first voltage to the first operation unit that is provided in the external connection device and operates at the first voltage;
A function of checking the supply of the second voltage to the second operating unit that is provided in the external connection device together with the first operating unit and operates at a second voltage lower than the first voltage;
When the supply of the first voltage to the first operating unit and the supply of the second voltage to the second operating unit are confirmed, the first operating unit and the second operating unit are A program for realizing a function of generating a signal indicating that it is operable. On the computer,
A function of confirming whether the voltage supplied to the second operating unit is the first voltage or the second voltage;
When the second voltage is supplied to the second operating part, the second voltage is supplied to the second operating part without conversion, and the second operating part is supplied with the first voltage. The program according to claim 19, further comprising a function of converting the first voltage into the second voltage and supplying the second voltage to the second operation unit when a voltage is supplied. .

Images