JP2011210322A5 - - Google Patents
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- JP2011210322A5 JP2011210322A5 JP2010078412A JP2010078412A JP2011210322A5 JP 2011210322 A5 JP2011210322 A5 JP 2011210322A5 JP 2010078412 A JP2010078412 A JP 2010078412A JP 2010078412 A JP2010078412 A JP 2010078412A JP 2011210322 A5 JP2011210322 A5 JP 2011210322A5
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- transformer
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- power supply
- voltage level
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Description
給電路Hの電圧レベルと停止信号に対する変圧部制御信号の関係を図2に示す。図2において、停止信号がLOWの場合は、必ず変圧部6がオフ(変圧部制御信号がLOW)となる。制御部10がマスタとなり変圧部6をオフできるようにするためである。停止信号がHIGHの場合は、給電路Hの電圧レベルにより変圧部6の状態が変わる。給電路Hの電圧レベルがLOW(Vin≦Vt)なら変圧部6がオフ(変圧部制御信号がLOW)、給電路Hの電圧レベルがHIGH(Vin>Vt)なら変圧部6がオン(変圧部制御信号がHIGH)する。このようにすることで、給電路Hの電圧レベルが低い場合は自動的に変圧部6をオフでき制御部10の制御が簡易になる。なおVtはLOWまたはHIGHを識別する閾値である。 FIG. 2 shows the relationship between the voltage level of the feed line H and the transformer control signal with respect to the stop signal. In FIG. 2 , when the stop signal is LOW, the transformer 6 is always turned off (the transformer control signal is LOW). This is because the control unit 10 becomes a master so that the transformer 6 can be turned off. When the stop signal is HIGH, the state of the transformer 6 changes depending on the voltage level of the power supply path H. The voltage level of the power supply path H is LOW (Vin ≦ Vt) If transformer 6 is turned off (transformer control signal is LOW), the voltage level of the power supply path H is HIGH (Vin> Vt) If transformer 6 Gao emissions (strange The pressure part control signal is HIGH. By doing in this way, when the voltage level of the feeding path H is low, the transformer 6 can be automatically turned off, and the control of the controller 10 is simplified. Vt is a threshold value for identifying LOW or HIGH.
以上のように構成された本発明の一実施の形態におけるフラッシュメモリ用電源装置について、図3、図4を用いて動作を説明する。図3はフラッシュメモリ用電源装置1の動作を説明する図である。また、図4は各部の信号のレベルを説明するための図である。 The operation of the power supply device for a flash memory according to an embodiment of the present invention configured as described above will be described with reference to FIGS. FIG. 3 is a diagram for explaining the operation of the flash memory power supply device 1. FIG. 4 is a diagram for explaining the signal level of each part.
まず、制御部10は、フラッシュメモリ3が搭載される電子装置のシステムがオンされたとき(S01)、制御部10はスリープ状態から復帰し、所定時間Tkの間だけ停止信号をLOWにする(S02)。その後、停止信号をHIGHにする。これが図4のT1〜T3に相当する。次に制御部10はコンデンサ7が十分に電荷を蓄積できる時間充電時間Tc(図4のT3〜T4)が経過後にメモリアクセスを開始(図4のT4)する(S03)。 First, when the system of the electronic device in which the flash memory 3 is mounted is turned on (S01), the control unit 10 returns from the sleep state and sets the stop signal to LOW for a predetermined time Tk ( S02 ). Later, the stop signal to HIGH. This corresponds to T1 to T3 in FIG. Next, the control unit 10 starts a memory access (T4 in FIG. 4) after a time charging time Tc (T3 to T4 in FIG. 4) in which the capacitor 7 can sufficiently accumulate electric charge has elapsed (S03).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010078412A JP5381864B2 (en) | 2010-03-30 | 2010-03-30 | Power supply for flash memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010078412A JP5381864B2 (en) | 2010-03-30 | 2010-03-30 | Power supply for flash memory |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2011210322A JP2011210322A (en) | 2011-10-20 |
JP2011210322A5 true JP2011210322A5 (en) | 2013-05-02 |
JP5381864B2 JP5381864B2 (en) | 2014-01-08 |
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ID=44941212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2010078412A Active JP5381864B2 (en) | 2010-03-30 | 2010-03-30 | Power supply for flash memory |
Country Status (1)
Country | Link |
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JP (1) | JP5381864B2 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3816788B2 (en) * | 2001-11-22 | 2006-08-30 | 株式会社東芝 | Nonvolatile semiconductor memory device |
US6735117B2 (en) * | 2002-07-01 | 2004-05-11 | Honeywell International Inc. | Hold-up power supply for flash memory |
JP4284247B2 (en) * | 2004-08-13 | 2009-06-24 | 株式会社東芝 | Nonvolatile semiconductor memory device |
-
2010
- 2010-03-30 JP JP2010078412A patent/JP5381864B2/en active Active
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