Xcell China 28 - (Page 18) 技 術 專 欄 利用 CoolRunner-IICPLD 設 計 GPS系 統 利用低功耗CoolRunner-II CPLD 擴展GPS產品功能 作者:Arthur Yang Xilinx 公司 Micro Scale 部技術營銷經理 arthur.yang@xilinx.com 正如查看地圖或讀報紙這些方式正在 迅速減少一樣, “問路” 這一概念也開始日 漸陌生。其行將消亡可歸因於全球定位系統 (GPS) 的日益普及。 GPS 在汽車、移動電話、PDA 甚至手錶等 越來越多產品中出現。每個 GPS 供應商都 推出數十種 GPS 產品,令消費者無所適選。 因此,產品的 成 功 在於 差 異 化 和專業 化。Xilinx ® CoolRunner-IITMCPLD 是用來增加 功能或與另一器件連接的理想芯片 ,能使您 的 GPS 產品在不超出功耗預算的情況下從 眾多同類產品中脫穎而出。 功耗優勢 便攜式和儀表板式 GPS 設備都必須遵 守嚴格的功耗預算。CoolRunner-II CPLD 具有 無需休眠模式狀態即可達到極低功耗的優 勢。最小的 CoolRunner-II 器件的靜態供電電 流只有 13 µA。在某些便攜式應用中,有一 種休眠模式足矣,並且可以接受數百毫秒的 喚醒時間。 然而在某些情況下,會丟失當前的設計 狀態。在使 用休眠模式時,整個設備都會 關閉。您必須依靠另一器件來輪詢中斷並 動喚醒序列。CoolRunner-II 器件通過其 DataGATE 功能提供一種可擺脫設計困惑的 獨特休眠模式;DataGATE 是自主運行的用 戶可配置電路,允許用戶根據需要停用器件 的某些部分。 通過 用 DataGATE 功能,在數納秒內 即可關閉選定的任意輸入 從而將 CPLD 的 , 功耗調節到更接近靜態功耗。此操作可以 階段性進行 (例如在輪詢到某個中斷時) , 也可根據特定的操作狀態進行。這樣便可 將 CoolRunner-II 器件的某些部分保持活躍 狀態,而將其餘部分置於待機狀態。 我們舉個例子來進一步說明。CPLD 位於 微處理器、移動 SDRAM 和 SD Flash 卡之間 的地址和數據總線上。數據在各器件之間 移動。CPLD 監測數據活動,並且根據特定 功能阻斷交通。如果當前任務是從微處理 器向 SD 卡移動數據,則 CPLD 用 DataGATE 功能阻斷往來於 SDRAM 的所有數據。 您在 CPLD 內部編寫代碼即可解譯正在 執行的功能 (通過監視地址線或解析幀數 據) ,然後開 /關閉所需的數據通路。這是 一個簡單泛例,不大可能用其它可編程邏輯 器件 (PLD) 通過使用輸出三態來實現。 18 賽靈思中國通訊 28期 ©2007 Xilinx Inc. 版權所有。XILINX、Xilinx 標誌以及本文件中包括的其他品牌名稱,是 Xilinx, Inc. 的商標。所有其他商標都是其各自所有者的財產。
Table of Contents Feed for the Digital Edition of Xcell China 28 Xcell China 28 Avnet Ad Table of Contents At the Heart of Consumer and Automotive Innovation Designing Digital Displays with Spartan-3 Generation FPGAs A High-Speed Broadcast Video Connectivity Solution Block Matching for Automotive Applications on Spartan-3A DSP Devices Taking Device DNA Technology to the Next Level Designing GPS Systems Using CoolRunner-II CPLDs Designing Portable Handsets Using CoolRunner-II CPLDs Scalable and Flexible In-Vehicle Networking A Compact Multimedia Display Development Platform for Automotive and Industrial Markets Supporting Multiple SD Devices with CPLDs Decrease Processor Power Consumption Using a CPLD Easing Design Challenges with CoolRunner-II CPLDs ISE Design Suite10.1 Xilinx Training Courses Apr - Jun Nu Horizons Ad Xilinx Ad Xcell China 28 Xcell China 28 - Xcell China 28 (Page 1) Xcell China 28 - Avnet Ad (Page 2) Xcell China 28 - Table of Contents (Page 3) Xcell China 28 - At the Heart of Consumer and Automotive Innovation (Page 4) Xcell China 28 - At the Heart of Consumer and Automotive Innovation (Page 5) Xcell China 28 - At the Heart of Consumer and Automotive Innovation (Page 6) Xcell China 28 - Designing Digital Displays with Spartan-3 Generation FPGAs (Page 7) Xcell China 28 - Designing Digital Displays with Spartan-3 Generation FPGAs (Page 8) Xcell China 28 - A High-Speed Broadcast Video Connectivity Solution (Page 9) Xcell China 28 - A High-Speed Broadcast Video Connectivity Solution (Page 10) Xcell China 28 - A High-Speed Broadcast Video Connectivity Solution (Page 11) Xcell China 28 - Block Matching for Automotive Applications on Spartan-3A DSP Devices (Page 12) Xcell China 28 - Block Matching for Automotive Applications on Spartan-3A DSP Devices (Page 13) Xcell China 28 - Block Matching for Automotive Applications on Spartan-3A DSP Devices (Page 14) Xcell China 28 - Taking Device DNA Technology to the Next Level (Page 15) Xcell China 28 - Taking Device DNA Technology to the Next Level (Page 16) Xcell China 28 - Taking Device DNA Technology to the Next Level (Page 17) Xcell China 28 - Designing GPS Systems Using CoolRunner-II CPLDs (Page 18) Xcell China 28 - Designing GPS Systems Using CoolRunner-II CPLDs (Page 19) Xcell China 28 - Designing Portable Handsets Using CoolRunner-II CPLDs (Page 20) Xcell China 28 - Designing Portable Handsets Using CoolRunner-II CPLDs (Page 21) Xcell China 28 - Scalable and Flexible In-Vehicle Networking (Page 22) Xcell China 28 - Scalable and Flexible In-Vehicle Networking (Page 23) Xcell China 28 - A Compact Multimedia Display Development Platform for Automotive and Industrial Markets (Page 24) Xcell China 28 - A Compact Multimedia Display Development Platform for Automotive and Industrial Markets (Page 25) Xcell China 28 - A Compact Multimedia Display Development Platform for Automotive and Industrial Markets (Page 26) Xcell China 28 - A Compact Multimedia Display Development Platform for Automotive and Industrial Markets (Page 27) Xcell China 28 - A Compact Multimedia Display Development Platform for Automotive and Industrial Markets (Page 28) Xcell China 28 - Supporting Multiple SD Devices with CPLDs (Page 29) Xcell China 28 - Supporting Multiple SD Devices with CPLDs (Page 30) Xcell China 28 - Supporting Multiple SD Devices with CPLDs (Page 31) Xcell China 28 - Decrease Processor Power Consumption Using a CPLD (Page 32) Xcell China 28 - Decrease Processor Power Consumption Using a CPLD (Page 33) Xcell China 28 - Decrease Processor Power Consumption Using a CPLD (Page 34) Xcell China 28 - Decrease Processor Power Consumption Using a CPLD (Page 35) Xcell China 28 - Decrease Processor Power Consumption Using a CPLD (Page 36) Xcell China 28 - Easing Design Challenges with CoolRunner-II CPLDs (Page 37) Xcell China 28 - Easing Design Challenges with CoolRunner-II CPLDs (Page 38) Xcell China 28 - Easing Design Challenges with CoolRunner-II CPLDs (Page 39) Xcell China 28 - Xilinx Training Courses Apr - Jun (Page 40) Xcell China 28 - Nu Horizons Ad (Page 41) Xcell China 28 - Xilinx Ad (Page 42)
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.