1286763 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種雙介面矽碟卡，且 特別係有關一種雙介面SD石夕碟卡。 【先前技術】 自1996年所發表的USB (Universal Serial Bus)介面規格以來，因它具有高傳 鲁 輸速率、安裝容易、可熱插拔（Hot Swapping) 以及隨插即用（P 1 u g & P 1 a y )等多項優點， 加以各廠商的推行，因此，其已逐漸取代傳 統的電腦週邊產品的各種傳輸介面。透過 · USB介面，主機端可以輕易的與各種電腦週 邊產品介接，如：掃描器、鍵盤、印表機… 等，而不需要再另外安裝驅動程式，使得具 有U S B介面產品不僅在許多電腦系統（如 _1286763 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a dual interface 矽 disc card, and in particular to a dual interface SD shi shi disc card. [Prior Art] Since the USB (Universal Serial Bus) interface specification published in 1996, it has high transmission rate, easy installation, hot swapping, and plug-and-play (P 1 ug & P 1 ay ) and many other advantages have been implemented by various manufacturers. Therefore, it has gradually replaced various transmission interfaces of traditional computer peripheral products. Through the USB interface, the host can easily interface with various computer peripheral products, such as scanners, keyboards, printers, etc., without the need to install additional drivers, making USB interface products not only in many computer systems. (Such as _
Desktop或Notebook)或其週邊產品，更在 各種資訊家電（I A)【如個人數位助理 (PDA)、數位相機（DSC)、數位隨身聽（MP3 Player)】等產品中亦迅速的普及起來。 另一方面，由 M a t s u s h i t a、S a n D i s k 與 Toshiba三大廠商合作並於西元2000年所 發表的一種新式小型「SD矽碟卡」標準，全 5 1286763 名為SecureDigital Card，由多顆可抹寫 式記憶體（f 1 a s h m e m o r y )與一微控制器/晶 片的矽晶半導體技術所構成。S D矽碟卡具有 體積小、重量輕、存取速度快、容量大等優 點，可廣泛地應用於電腦週邊產品、個人數 位助理、數位相機、數位隨身聽等各種I A 產品，已成為新興的可攜式儲存媒體之一， 因其受較多大廠的推行並且在其他小型矽 碟卡中體積最小。因此，研判「SD矽碟卡」 未來較具有廣大的消費市場及龐大的潛在 商機。 其中，SD矽碟卡係採用專屬的SD卡介 面，雖然各種電腦週邊產品或資訊家電可針 對SD矽碟卡開發設計專屬的介面產品，藉 由存取其中的數位貧訊和貧料’然而卻無法 兼顧消費者經常需要與電腦系統或筆記型 電腦、及其他利用USB擴充介面的各類商品 進行資料傳輸或交換的功能。因此，針對越 來越普及的USB擴充介面的商品，SD矽碟卡 無法直接應用於上述產品中，例如：當消費 者在數位相機上藉由S D矽碟卡存取數位資 訊，並欲在電腦系統或其他具U S B介面的產 品上編輯、顯示或其他應用時，因該些產品 並無相對應的SD卡介面，所以無法直接使 6 1286763 用，造成使用上的不便性。 因此，消費者除了使用上述資訊家電本 身具備的系統傳輸功能外，往往需要另行購 買一具備SD矽碟卡介面的矽碟機（又稱讀卡 機）或一轉接卡（A d a p t e r )，以便於電腦系統 或可攜式數位資訊產品等具有USB擴充介面 的產品使用，進行資料傳輸或交換的功能。 然而，藉由另外購置的矽碟機或轉接卡，透 過矽碟機上的U S B傳輸線再轉接或購買一與 該電腦系統本身具備的系統傳輸介面的卡 片，間接讀取或交換此SD矽碟卡内的資料。 因此，這兩種方法都是利用SD矽碟卡相關 研發出的高成本讀取設備（因其内部都具備 有一控制晶片），使得消費者購置成本增 加、亦增加操作時的複雜性，使「SD石夕碟卡」 在未來的發展與其USB介面的共用性與使用 性上都有不方便的地方。 【發明内容】 有鑑於此，本發明人乃多年矽碟卡/機 之專門研發製造人，為解決上述問題及達到 其他功效及目的，致力於矽碟卡/機之研發 與創作不遺餘力，在經過不斷的研究和測試 後，終能設計出一種「雙介面SD矽碟卡」，俾能 1286763 解決懸宕已久的問題。 具體言之，本發明人為徹底改善上述問 題點，遂提出一種雙介面S D矽碟卡，消彌 需要額外購置的高成本中間讀取或轉接的 附加設備而接合一低成本的轉接裝置，進行 與各種數位資訊裝置或產品的資訊傳輸及 交換功能，解決習知消費者額外購置成本增 加、操作上複雜性提高與使用上不便等問 本發明另一目的係透過該卡本身的一 「微控制器」作適當的偵測、控制與切換處 理，容許其經過一低成本的USB轉接裝置， 即可直接連接個人電腦系統或其他具U S B擴 充介面的產品。如此的結合，相似於市面上 十分流行的可攜式「大姆哥」（又稱行動 碟）。然此微控制器除了支援本身的S D矽碟 卡介面外，更支援U S B擴充介面的功能；換 言之，本發明之雙介面SD矽碟卡的「微控 制器」整合了習知需透過一讀卡機或一轉接 卡上【控制晶片】的功能，使得消費者以最 低的購置成本，最方便的操作方式，在電腦 系統或各種I A產品間提供數位資訊的儲 存、傳輸、與交換的功能。 本發明又一目的，更可大幅降低系統成 8 明 發 本 照 依 示 .繪 係 其 ， 圖 li 式一 方第 施考 實參 [請 1286763 本（消彌需額外購置高成本的讀取連接設 備），操作更方便（安裝、操作更方便簡單） 且為獨特之進步性創舉。因此，本發明係將 原本僅具備S D矽碟卡專屬的S D介面，轉換 並透過適當的設備，自動偵測/判斷系統介 面電路並自動切換至正確系統介面而支援 電腦系統端等產品最為普及之U S B介面產 品，而同時兼具有SD與USB雙介面傳輸功 效之高創作性小型石夕碟卡。 「雙介面S D矽碟卡」之控制電路方塊圖。 本發明係由雙介面S D矽碟卡（1 0 )與U S B 轉接裝置（30)結合而成一可與市面上廣泛 具有USB擴充介面的商品使用的獨創發明。 由於USB擴充介面的普及與風行，且SD矽 碟卡有逐漸成為眾多小型矽碟卡的主流並 應用於各種電腦週邊及其他I A商品中，為 了不使SD矽碟卡僅僅應用於其專屬的SD卡 介面產品，亦能兼具有與電腦系統或其他具 USB擴充介面的產品。 於是，如圖一所示，本發明之雙介面SD 石夕碟卡（10)包含有一第一傳輸介面，亦即Desktop or Notebook) or its peripheral products are also rapidly popularized in various information appliances (I A) such as personal digital assistants (PDAs), digital cameras (DSCs), and digital walkmans (MP3 Players). On the other hand, a new type of small "SD disc card" standard, which was co-produced by the three major manufacturers of M atsushita, S an D isk and Toshiba in 2000, is called "SecureDigital Card" and is smeared by many. The write memory (f 1 ashmemory ) is composed of a microcontroller/wafer silicon semiconductor technology. SD 矽 disc card has the advantages of small size, light weight, fast access speed, large capacity, etc. It can be widely used in computer peripheral products, personal digital assistants, digital cameras, digital walkmans and other IA products, and has become an emerging one. One of the portable storage media, because it is promoted by many large manufacturers and is the smallest in other small disc cards. Therefore, the future of the "SD 矽 卡 」 」 」 较 较 较 较 较 较 较 较 较 较 较 较 较 较 较 较Among them, the SD disc card system uses a dedicated SD card interface, although various computer peripheral products or information appliances can develop and design exclusive interface products for SD disc cards, by accessing the digital poor and poor materials. It is impossible to balance the functions that consumers often need to transfer or exchange data with computer systems or notebook computers, and other products that use the USB expansion interface. Therefore, for the increasingly popular USB expansion interface products, SD disc cards cannot be directly applied to the above products, for example, when consumers access digital information through a SD disc card on a digital camera, and want to use the computer. When editing, displaying or other applications on systems or other products with USB interface, since there is no corresponding SD card interface for these products, it is not possible to directly use 6 1286763, which causes inconvenience in use. Therefore, in addition to the system transmission function of the information appliance itself, the consumer often needs to purchase a CD player (also known as a card reader) or an adapter (A dapter) with an SD card interface. It is used for products with USB expansion interface, such as computer systems or portable digital information products, for data transmission or exchange. However, by additionally purchasing a smashing machine or a riser card, the USB transmission cable on the smashing machine is used to transfer or purchase a card with the system transmission interface of the computer system itself to indirectly read or exchange the SD 矽. The information in the card. Therefore, both of these methods are based on the high-cost reading device developed by the SD disc card (because they have a control chip inside), which increases the cost of purchasing and increases the complexity of the operation. SD Shiyue Card is inconvenient in the future development and compatibility and usability of the USB interface. SUMMARY OF THE INVENTION In view of the above, the inventor has been a specialized R&D manufacturer of the disc card/machine for many years, and has spared no effort in solving the above problems and achieving other functions and purposes, and has devoted himself to the development and creation of the disc card/machine. After continuous research and testing, we can finally design a "dual interface SD disc card", which can solve the long-standing problem. Specifically, in order to completely improve the above problems, the inventors have proposed a dual-interface SD disc card, which eliminates the need for additional high-cost intermediate reading or switching additional equipment to engage a low-cost switching device. Performing information transmission and exchange functions with various digital information devices or products to solve the problem of increased cost of additional purchases, increased operational complexity and inconvenience in use, etc. Another object of the present invention is to pass through the card itself. The controller is properly detected, controlled and switched to allow direct connection to a personal computer system or other product with a USB expansion interface via a low-cost USB adapter. This combination is similar to the portable "Dumgo" (also known as the action disc) that is very popular on the market. However, in addition to supporting its own SD card interface, the microcontroller also supports the function of the USB expansion interface; in other words, the "microcontroller" of the dual interface SD disk card of the present invention integrates a conventional read card. The function of [Control Chip] on the machine or a riser card enables consumers to provide digital information storage, transmission, and exchange functions between computer systems or various IA products with the lowest cost of purchase and the most convenient operation. According to still another object of the present invention, the system can be greatly reduced in accordance with the instructions of the present invention. The drawing system is the first method of the test. [Please call 1286663 (the need to purchase additional high-cost reading connection devices) ), the operation is more convenient (installation, operation is more convenient and simple) and is a unique and progressive work. Therefore, the present invention converts the SD interface exclusive to the SD disc card and converts it through the appropriate device, automatically detects/determines the system interface circuit and automatically switches to the correct system interface to support the most popular products such as the computer system end. USB interface product, while at the same time, it has a high-creative small Shi Xi disc card with SD and USB dual interface transmission. Block diagram of the control circuit of the "dual interface S D disc card". The invention combines a dual interface S D disc card (10) with a U S B adapter device (30) to form a unique invention that can be used with products having a wide USB extension interface on the market. Due to the popularity and popularity of the USB expansion interface, and the SD disc card has gradually become the mainstream of many small disc cards and is used in various computer peripherals and other IA products, in order not to apply the SD disc card only to its exclusive SD. Card interface products can also be combined with computer systems or other products with USB expansion interface. Thus, as shown in FIG. 1, the dual interface SD stone card (10) of the present invention includes a first transmission interface, that is,
9 1286763 是其 SD卡標準的傳輸介面（I/Opin為 9 個）與一電路板（1 2 )。此電路板（1 2 )設 有一微控制器（1 6 )及多數個可抹寫式記憶 體（14)，且在電路板（12)上至少内建有一 第一匯流排介面電路（2 0 )、一資料暫存緩 衝單元（1 8 )及一電源轉換電路（2 6 )，當 然，更包含有一控制存取介面及一程式碼儲 存記憶體（圖未繪示）等，然上述諸元之設 計、原理及結構與習知相同，在此不另贅 述。又，與雙介面 SD矽碟卡接合低成本之 USB轉接裝置（30)至少包含一矽碟卡介面 插槽（圖未繪示）及第二傳輸介面，此第二 傳輸介面意指 U S B插頭（3 2 )。明顯地，此 矽碟卡介面插槽用以提供雙介面 SD矽碟卡 (10 )的介接，並藉用USB轉接裝置（30 ) 之第二傳輸介面（USB插頭（32 ))得以與電 腦系統或其他具USB擴充介面的產品使用。 其中本發明之特徵在於：雙介面 S D矽 碟卡（1 0 )包括一第二匯流排介面電路（2 2 ) 與一介面偵測控制與切換電路（2 4 )。 一在本實施例中，前述之第一匯流排介 面電路（2 0 )係一用於S D矽碟卡之S D匯流 排介面電路，而該第二匯流排介面電路（2 2 ) 係一用於系統端之U S B匯流排介面電路，其 1286763 中該等匯流排介面電路（20 )、（ 2 2 )係藉由該 介面偵測控制與切換電路（2 4 )的電性連接 而與外部之 USB轉接裝置（30)或一適用於 S D矽碟卡之系統介面電路（3 4 )進行資料傳 輸，而該介面偵測控制與切換電路（2 4 )係用 以偵測是否有來自一 S D矽碟卡使用之系統 介面電路所產生之一初始化信號，並根據其 偵測的信號有無而切換成第一（S D)匯流排 介面電路（20)或第二（USB)匯流排介面電路 (2 2 )作動。 另外在本發明中，微控制器（1 6 )可自 動偵測、判斷及支援S D卡的傳輸介面或U S B 插頭（3 2 )之連接動作訊號；當 S D矽碟卡 的傳輸介面（未繪示）或USB插頭（32 )的其 中任一訊號傳輸端提供動作訊號時，微控制 器（1 6 )即同時切換該電路板（1 2 )内電路 及其電子元件進行支援SD卡的傳輸介面或 USB插頭（32 )的資料傳輸動作於該些可抹 寫式記憶體（1 4 )中。 在此需特別強調的是，此雙介面 SD矽 碟卡（1 0 )之微控制器（1 6 )不僅可判斷、 控制使用於其專屬之SD卡介面產品中，藉 由結合USB轉接裝置（30 )的使用，更可應 用於具USB擴充介面的產品。使本發明兼具 11 1286763 有SD與USB雙介面傳輸功效之可攜式小型 儲存媒體。 請同時參考第二圖，其係繪示依照本發 明「雙介面SD矽碟卡」之偵測、控制與切 換的判斷電路方塊圖。本發明之雙介面S D 矽碟卡（1 0 )内部具有兩種不同的系統介面 電路（3 4 )，亦即，整合了習知需透過一讀 卡機或一囀接卡上【控制晶片】的功能，圖 示中除了電源連接端子（包括兩根接地端子 VSS1與VSS2以及一電源端子VDD)未繪以 外，共包含有 CLK、CMD、DAT0、DAT1、DAT2、 DAT3等六種不同功能的信號端子。本發明之 雙介面S D矽碟卡（1 0 )係採用其中的D A T 1 及D A T 2兩組信號作為連接、切換U S B系統 介面電路（34)的D +信號與D-信號【亦即 以SD矽碟卡之DAT1及DAT2兩組信號端子 作為與USB的D +與D -信號共用之端子】，並 利用CLK信號端子作為偵測系統介面電路 (3 4 )的動作訊號，作為其採用第一匯流排 介面電路/SD匯流排介面電路（20)或第二 匯流排介面電路/ U S B匯流排介面電路（2 2 ) 的依據。 根據S D矽碟卡標準，本發明之S D匯流 排介面（20)在連接電源（PowerON)的狀 12 1286763 態下且在S D矽碟卡系統介面電路（3 4 )產 生了一初始化的信號（即產生7 4脈衝/秒）， 即會驅動C L K信號變化，代表此時採用的介 面電路為S D匯流排介面電路（2 0 );相反的， 當S D矽碟卡系統介面電路（3 4 )並未產生 此一初始化信號，信號彳貞測電路（2 4 2 )會 輸出一控制信號至信號切換電路（2 4 4 )，使 原本連接SD匯流排介面電路的DAT1及DAT2 兩組信號端子切換至U S B匯流排介面電路 (22)。因此，本發明即利用此一介面偵測 控制電路與切換電路（2 4 )之動作信號，偵 測本發明之系統介面電路（3 4 )係採用何種 動作信號為依據。 為能同時支援兩種不同的系統介面電 路（34)，本發明之雙介面SD矽碟卡（10) 的微控制器（1 6 )中亦内建有同時具備處理 兩種系統介面電路（3 4 )所需具備的處理功 能，並支援兩種不同介面電路產生之指令、 規格與通訊協定等。如圖三所示，其係繪示 依照本發明「雙介面 SD矽碟卡」之偵測與 切換時的較佳具體流程圖。其中，電源啟動 (4 0 )供應雙介面S D矽碟卡（1 0 )後，微 控制器（1 6 )隨即依據介面偵測控制與切換 電路（2 4 )所偵測到的系統動作種類，切換 13 1286763 至正確的工作模式並據以啟動適當的系統 介面電路（34 )模式。系統介面電路（34 ) 啟動後，微控制器（1 6 )便依據該系統介面 電路（3 4 )之標準規格，接收其傳輸之指令 代碼並加以控制處理，產生適當回應。例 如：當介面偵測控制與切換電路（2 4 )所偵 測到的系統電路係為第一匯流排模式（亦即 S D B u s Μ 〇 d e )時，隨即進入S D石夕碟卡標準 的動作循環模式，亦即選擇S D匯流排（4 2 ) 經其匯流排閒置（Bus Idle )( 44 )產生一 SD指令（4 6 )，再處理該指令並產生回應（48 ) 後，再回到匯流排閒置（4 4 )。相反的，當 介面偵測控制與切換電路（2 4 )所偵測到的 系統電路係為第二匯流排模式（亦即 USB Bus Mode) 時，隨即進入USB介面標準的動 作循環模式，亦即選擇U S B匯流排（5 0 )經 其匯流排閒置（52 )產生一 USB指令（54 )， 再處理該指令並產生回應（5 6 )後，再回到 匯流排閒置（5 2 )。 系統介面電路（3 4 )既經設定後就無法 隨時改變。若需變更本發明之系統介面電路 (3 4 )時，必須將雙介面 S D矽碟卡（1 0 ) 之系統介面電路（3 4 )整個抽離再關閉電源 後，即可重新連接另一系統介面電路。 14 1286763 請參考第四圖，其係繪示依照本發明 「雙介面SD矽碟卡」之USB介面轉接裝置 線路圖。本發明之雙介面 S D矽碟卡（1 0 ) 與低成本的USB轉接裝置（30 )之線路結合 之簡要示意圖。 綜上所述，本發明之「雙介面SD矽碟 卡」，至少具有下列幾項優點： 1、 本發明係消彌需要額外購置的中間讀取 或轉接的高成本附加設備而接合一低成本 之轉接裝置，可進行與各種數位資訊裝置或 產品的資訊傳輸或交換功能，解決習知需另 外購置矽碟機或轉接器/卡的成本增加、並 且增加操作上的複雜性等問題。 2、 本發明另一目的係透過S D矽碟卡上本身 的一「微控制器」作適當的偵測、控制與切 換處理，容許其經過一低成本的U S B轉接裝 置，即可直接連接個人電腦系統或其他具 U S B擴充介面的產品。然此微控制器除了支 援本身的SD卡介面外，更支援USB擴充介 面的功能；換言之，本發明之雙介面S D矽 碟卡的「微控制器」整合了習知需透過一讀 卡機或一轉接卡上【控制晶片】的功能，使 得消費者以最低的購置成本，最方便的操作 方式，在電腦系統或各種I A產品間提供數 15 1286763 位資訊的儲存、傳輸、與交換的功能。 3、本發明又一目的，更可大幅降低系統成 本、操作更方便且為獨特之進步性創舉。因 此，本發明係將原本僅具備SD矽碟卡專屬 的SD介面，轉換並透過適當的設備，自動 偵測/判斷系統介面電路並自動切換至正確 系統介面而支援電腦系統端等產品最為普 及之USB介面產品，而同時兼具有SD與USB 雙介面傳輸功效之可攜式小型矽碟卡。 然本發明之整體設計概念已詳述如 上，並以一較佳具體實施例敘明其方法與裝 置，且並未見有相同、或近似及揭示在先之 設計，而具備新穎性與進步性，實已符合專 利法之要件，俾懇請賜予專利為禱。 上述各元件名稱係為方便描述本發明 之技術内容所定，然其並非用以限定本發 明，凡依據本發明之創作精神所做的等效轉 換替代，任何熟習此技藝者，在不脫離本發 明之精神與範圍内，當可做些許之更動與潤 飾，因此，本發明之保護範圍當視後附之申 請範圍所界定者為準。 【圖式簡單說明】 以下藉由圖示及配合圖示之詳細說明 16 1286763 而得以更深入暸解本發明之實施例： 第一圖係繪示依照本發明雙介面S D砍碟卡 之控制電路方塊圖。 第二圖係繪示依照本發明雙介面SD矽碟卡 之偵測、控制與切換的判斷電路方塊圖。 第三圖係繪示依照本發明雙介面S D矽碟卡 之偵測與切換時的較佳具體流程圖。 第四圖係繪示依照本發明雙介面S D矽碟卡 之U S B介面轉接裝置線路圖。 【主要元件符號說明】 雙介面S D矽碟卡（1 0 ) 電路板（1 2 ) 可抹寫式記憶體（1 4 ) 微控制器（1 6 ) 資料暫存緩衝單元（1 8 ) 第一匯流排介面電路/ S D匯流排介面電路 (20) 第二匯流排介面電路/ U S B匯流排介面電路 (22) 介面偵測控制電路與切換電路（2 4 ) 信號偵測電路（2 4 2 ) 信號切換電路（2 4 4 ) 1286763 電源轉換電路（2 6 ) USB轉換裝置（30) U S B 插頭（3 2 ) 系統介面電路（3 4 ) 電源啟動（4 0 ) 選擇SD匯流排（42) 匯流排閒置（44)、（52) SD指令（46) 選擇USB匯流排（50) 處理該指令並產生回應（4 8 )、（ 5 6 ) USB 指令（54)9 1286763 is the SD card standard transmission interface (9 I/Opin) and a circuit board (1 2 ). The circuit board (12) is provided with a microcontroller (16) and a plurality of rewritable memory (14), and at least a first bus interface circuit is built in the circuit board (12) (20) a data buffering unit (18) and a power conversion circuit (26), of course, further comprising a control access interface and a code storage memory (not shown), etc. The design, principle and structure are the same as those in the prior art and will not be further described herein. Moreover, the low-cost USB adapter device (30) coupled with the dual-interface SD card card includes at least one disk card interface slot (not shown) and a second transmission interface, and the second transmission interface means a USB plug. (3 2 ). Obviously, the interface card slot is used to provide the interface of the dual interface SD disk card (10), and the second transmission interface (USB plug (32)) of the USB adapter device (30) is used. Use with computer systems or other products with a USB expansion interface. The invention is characterized in that the dual interface S D矽 disc card (10) comprises a second bus interface circuit (2 2 ) and an interface detection control and switching circuit (2 4 ). In the embodiment, the first bus interface circuit (20) is an SD bus interface circuit for an SD card, and the second bus interface circuit (2 2) is used for The USB bus interface circuit on the system side, in the 1286763, the bus interface circuits (20), (2 2) are electrically connected to the external circuit by the interface detection control and the switching circuit (24) The switching device (30) or a system interface circuit (34) for the SD card is used for data transmission, and the interface detection control and switching circuit (24) is used to detect whether there is an SD device. The initialization signal generated by the system interface circuit used by the disc card is switched to the first (SD) bus interface circuit (20) or the second (USB) bus interface circuit according to the presence or absence of the detected signal (2 2 ) Acting. In addition, in the present invention, the microcontroller (16) can automatically detect, determine and support the connection interface of the SD card's transmission interface or USB plug (3 2); when the SD 矽 disc card's transmission interface (not shown) Or when any one of the signal transmission ends of the USB plug (32) provides an action signal, the microcontroller (16) simultaneously switches the circuit and its electronic components of the circuit board (12) to support the transmission interface of the SD card or The data transfer of the USB plug (32) operates in the rewritable memory (14). It should be particularly emphasized that the dual-interface SD disk card (10) microcontroller (16) can not only be judged and controlled for use in its exclusive SD card interface product, by combining USB adapter devices. The use of (30) is more applicable to products with USB expansion interface. The invention combines 11 1286763 a portable small storage medium with SD and USB dual interface transmission efficiency. Please also refer to the second figure, which is a block diagram showing the judgment circuit of the detection, control and switching of the "dual interface SD disc card" according to the present invention. The dual interface SD disk card (10) of the present invention has two different system interface circuits (3 4 ) internally, that is, the integration of the conventional need to pass through a card reader or a docking card [control chip] The function, in addition to the power connection terminal (including the two ground terminals VSS1 and VSS2 and a power supply terminal VDD), includes signals of six different functions such as CLK, CMD, DAT0, DAT1, DAT2, and DAT3. Terminal. The dual interface SD 矽 disc card (10) of the present invention uses DAT 1 and DAT 2 signals in the pair as a D + signal and a D-signal for switching and switching the USB system interface circuit (34) [ie, SD 矽The DAT1 and DAT2 signal terminals of the disc card serve as terminals for sharing the D + and D - signals of the USB], and the CLK signal terminal is used as the action signal of the detection system interface circuit (3 4 ) as the first convergence current. The basis of the interface circuit / SD bus interface circuit (20) or the second bus interface circuit / USB bus interface circuit (2 2). According to the SD disc card standard, the SD bus interface (20) of the present invention generates an initial signal in the state of the power supply (PowerON) 12 1286763 and in the SD disc system interface circuit (34). Generate 7 4 pulses / sec), which will drive the CLK signal change, which means that the interface circuit used at this time is the SD bus interface circuit (20); on the contrary, when the SD 矽 card system interface circuit (3 4) is not When the initialization signal is generated, the signal detection circuit (2 4 2 ) outputs a control signal to the signal switching circuit (24 4 4), so that the two sets of DAT1 and DAT2 signal terminals originally connected to the SD bus interface circuit are switched to the USB. Bus interface circuit (22). Therefore, the present invention utilizes the action signals of the interface detection control circuit and the switching circuit (24) to detect which action signal is used by the system interface circuit (34) of the present invention. In order to support two different system interface circuits (34) at the same time, the microcontroller (16) of the dual interface SD disk card (10) of the present invention also has built-in processing of two system interface circuits (3) 4) Required processing functions and support for instructions, specifications and communication protocols generated by two different interface circuits. As shown in FIG. 3, it is a detailed flowchart of the detection and switching of the "dual interface SD disc card" according to the present invention. Wherein, after the power supply is started (40), the dual interface SD disc card (10) is supplied, and the microcontroller (16) is then determined according to the type of system motion detected by the interface detection control and switching circuit (24). Switch 13 1286763 to the correct operating mode and start the appropriate system interface circuit (34) mode accordingly. After the system interface circuit (34) is started, the microcontroller (16) receives the command code of the transmission according to the standard specifications of the system interface circuit (34) and controls it to generate an appropriate response. For example, when the system circuit detected by the interface detection control and switching circuit (24) is in the first bus mode (ie, SDB us Μ 〇de), then the action cycle of the SD stone card standard is entered. The mode, that is, selecting the SD bus (4 2 ) generates an SD command (4 6 ) via its bus Idle ( 44 ), processes the command and generates a response (48 ), and then returns to the bus. Idle (4 4 ). Conversely, when the system circuit detected by the interface detection control and switching circuit (24) is in the second bus mode (ie, USB Bus Mode), the standard operating cycle mode of the USB interface is entered, that is, Selecting the USB bus (50) generates a USB command (54) via its bus idle (52), processes the command and generates a response (5 6), and then returns to the bus idle (5 2 ). The system interface circuit (3 4 ) cannot be changed at any time after being set. If the system interface circuit (3 4 ) of the present invention needs to be changed, the system interface circuit (3 4 ) of the dual-interface SD disk card (10) must be completely removed from the power supply, and then the other system can be reconnected. Interface circuit. 14 1286763 Please refer to the fourth figure, which is a circuit diagram of a USB interface switching device of a "dual interface SD disc card" according to the present invention. A schematic diagram of the dual interface S D矽 card (10) of the present invention combined with the low cost USB switching device (30). In summary, the "dual interface SD disc card" of the present invention has at least the following advantages: 1. The present invention eliminates the need for an additional intermediate reading or transfer of high cost additional equipment and a low joint The cost of the transfer device, which can carry out the information transmission or exchange function with various digital information devices or products, and solve the problems of increasing the cost of the additional purchase of the drive or the adapter/card, and increasing the operational complexity. . 2. Another object of the present invention is to perform appropriate detection, control and switching processing through a "microcontroller" on the SD disc card, allowing it to directly connect to the individual through a low-cost USB switching device. A computer system or other product with a USB expansion interface. However, in addition to supporting its own SD card interface, the microcontroller also supports the function of the USB expansion interface; in other words, the "microcontroller" of the dual interface SD disk card of the present invention integrates the conventional need to pass a card reader or The function of [Control Chip] on the riser card enables consumers to provide 15 1286763 bits of information storage, transmission, and exchange functions between computer systems or various IA products with the lowest cost of purchase and the most convenient operation. . 3. Another object of the present invention is to further reduce system cost, operate more conveniently, and be unique and progressive. Therefore, the present invention converts the SD interface exclusive to the SD disc card and converts it through the appropriate device, automatically detects/determines the system interface circuit and automatically switches to the correct system interface to support the most popular products such as the computer system end. USB interface product, while portable mini-disc card with SD and USB dual interface transmission. However, the overall design concept of the present invention has been described above in detail, and its method and apparatus are described in a preferred embodiment, and there is no identical, or similar, and revealing prior design, but novelty and advancement. It has already met the requirements of the patent law, so please give the patent as a prayer. The above-mentioned respective component names are intended to describe the technical content of the present invention, and are not intended to limit the present invention, and equivalent conversions are made in accordance with the inventive spirit of the present invention, and those skilled in the art can not deviate from the present invention. In the spirit and scope of the invention, the scope of protection of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The following is a more detailed description of the embodiments of the present invention by means of the drawings and the detailed description of the drawings: 1 1 286 763. The first figure shows the control circuit block of the dual interface SD chopping card according to the present invention. Figure. The second figure is a block diagram of a judging circuit for detecting, controlling and switching a dual interface SD disc card according to the present invention. The third figure shows a preferred specific flow chart when detecting and switching the dual interface SD card in accordance with the present invention. The fourth figure shows the circuit diagram of the U S B interface switching device of the dual interface S D disc card according to the present invention. [Main component symbol description] Dual interface SD 矽 disc card (1 0 ) Circuit board (1 2 ) rewritable memory (1 4 ) Microcontroller (1 6 ) Data temporary buffer unit (1 8 ) First Bus interface circuit / SD bus interface circuit (20) Second bus interface circuit / USB bus interface circuit (22) Interface detection control circuit and switching circuit (2 4 ) Signal detection circuit (2 4 2 ) Signal Switching circuit (2 4 4 ) 1286763 Power conversion circuit (2 6 ) USB converter (30) USB plug (3 2 ) System interface circuit (3 4 ) Power start (4 0 ) Select SD bus (42) Bus bar idle (44), (52) SD command (46) Select USB bus (50) to process the command and generate a response (4 8 ), ( 5 6 ) USB command (54)
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