N32926U1DN

Not Recommended for New Design (NRND)

Recommended Part Number : N32926U6DN

N32926U1DN是專門為了加速影像和聲音串流效能所設計出來的晶片，使用於雲端多媒體串流的應用。影像串流主要是使用硬體的H.264 編解碼器和MJPEG編解碼器，聲音串流則是使用AAC加速器和聲音處理單元，有效提升了效能並降低了CPU的負載和功耗電。

N32926U1DN是基於ARM926EJ-S CPU核心所開發，整合了硬體H.264 編解碼器、乙太網路MAC、硬體JPEG解編碼器、CMOS攝像頭介面、32 通道的聲音撥放單元、 ADC 、DAC和TV編碼器以滿足各式各樣的應用需求，同時減少生產物料成本。ARM926@240 MHz 、DDR2、H.264編解碼器、AAC加速器、SDIO Host控制器和USB 2.0高速Host及Device的組合使得N32926U1DN成為串流裝置的最佳選擇。

N32926U1DN使用了Linux作業系統，方便驅動程式和應用軟體的的移植和開發，像是WiFi和瀏覽器等。另一方面，開源碼使得產品開發更有彈性。新唐持續於Linux的優化，提供客戶高成本效益，高效能的 影音串流參考方案。另外，合作廠商的USB和SDIO WiFi模組被整合進來搭配一些裝置做WiFi串流應用，像是智慧型手機、平板、筆記型電腦或智慧型電視等。

N32926U1DN的最高顯示解析度是D1 ( 720x480 ) 的電視輸出或 1024x768 的TFT LCD輸出。影像串流的應用愈來愈普及，解析度也愈來愈高，H.264的高壓縮比是在有限頻寬下的最佳選擇 。在WiFi、乙太網路或自訂的RF應用方面，N32926U1DN定位在最佳成本效益的 影音串流市場。在自訂的2.4GHz應用方面，提供了硬體CRC產生器和檢查引擎，可以降低CPU的負載和功耗，另外，Scrambler、Inter-lever、Reed-Solomon編解碼和Convolutional編解碼等硬體通道編碼引擎的整合，可以協助讓雍塞的2.4GHz頻帶上的影音串流傳輸更為穩定順暢。

為了降低系統設計的複雜度和降低製造成本，N32926U1DN使用了 128-pin LQFP的多晶片封裝，晶片內部堆疊了16Mx16 DDR2，可減少許多系統設計的精力，像是EMI和雜訊問題的處理上。N32926U1DN系統設計的好處是可以使用 2 層PCB並減少阻尼電阻器及EMI抑制元件的使用，進而降低製造成本。

The N32926U1DN is specially designed for accelerating video/audio streaming performance, when H.264 codec and MJPEG codec are mainly used for constructing the arts used in video streaming and the hardware AAC accelerator and the sound processor are used for the corresponding audio streaming in the cloud multimedia streaming applications. The embedded video codec engines and audio compression/decompression accelerator to enhance performance while off-loading the CPU to save power consumption.

The N32926U1DN is built on the ARM926EJ-S CPU core and integrated with video decoder ( H.264 ) , Ethernet MAC, JPEG codec, CMOS sensor interface, 32-channel SPU ( Sound Processing Unit ) , ADC , DAC, & TV encoder, for meeting various kinds of application needs while saving the BOM cost. The combination of ARM926 @ 240 MHz , DDR2, H.264 codec and AAC accelerator, SDIO host controller & USB2.0 HS Host/Device makes the N32926U1DN the best choice for video/audio streaming devices.

The N32926U1DN could be also ported under Linux OS to leverage the driver availability of emerging functionalities, like Wi-Fi, browser, etc. On the other hand, the open source code environment also gives the product development more flexibility. Nuvoton’s continuous optimizations at Linux provide customers with a cost-effective video/audio streaming solution. Moreover, the 3rd parties USB and SDIO Wi-Fi modules are introduced to best utilize in the Wi-Fi streaming application with devices like smart phones, tablets, notebooks, or smart TV etc.

Maximum resolution for the N32926U1DN is D1 ( 720x480 ) @ TV output & 1024x768 @ TFT LCD panel. With increasing popularity of the video streaming resolutions, the H.264 is the best fit for the limited bandwidth application that requires smaller data rate for high-resolution video. The N32926U1DN is well designed in terms of cost/performance for the video/audio streaming market where Wi-Fi, Ethernet or proprietary RF is extensively used. For 2.4GHz proprietary applications, the hardware CRC generator and checking engines will off-load CPU loading to save the power consumption. Moreover, the hardware channel coding engine including scrambler, inter-leaver, Reed-Solomon outer codec and convolutional inner codec engines are used for more reliable wireless video/audio data streaming in the crowd 2.4GHz ISM band environment.

To reduce system complexity while cutting the BOM cost, the N32926U1DN also comes with a 128-pin MCP ( Multi-Chip Package ) in LQFP. The 32Mbitx16 DDR2 is stacked inside the MCP to ensure higher performance and minimize the system design efforts, like EMI, noise coupling. Total BOM cost could be cut by employing 2-layer PCB along with the elimination of damping resistors, EMI prevention components, & with less board space.