基于SAA1160A設(shè)計的嵌入式USB主控制方案
SAA1160A Embedded USB host controller
The SAA1160A is an embedded Universal Serial Bus (USB) Host Controller (HC) that complies with Universal Serial Bus Specification Rev. 2.0, supporting data transfer at full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s). The SAA1160A provides two downstream ports. Each downstream port has an OverCurrent (OC) detection input pin and power supply switching control output pin. The downstream ports for the HC can be connected with any USB compliant USB devices and USB hubs that have USB upstream ports.
The SAA1160A is well suited for embedded systems and portable devices that require a USB host. The SAA1160A brings high flexibility to the systems that have it built in. For example, a system that has the SAA1160A built in allows it to be connected to a device that has a USB upstream port, such as a USB printer, USB camera, USB keyboard, USB mouse, among others.
SAA1160A主要特性和優(yōu)勢：
Complies with Universal Serial Bus Specification Rev. 2.0
Supports data transfer at full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s)
Adapted from Open Host Controller Interface Specification for USB Release 1.0a
Selectable one or two downstream ports for HC
High-speed parallel interface to most of the generic microprocessors and Reduced Instruction Set Computer (RISC) processors such as:
Hitachi SuperH SH-3 and SH-4
MIPS-based RISC
ARM7, ARM9 and StrongARM
Maximum 15 MB/s data transfer rate between the microprocessor and the HC
Supports single-cycle and burst mode DMA operations
Built-in FIFO buffer RAM for the HC (4 kB)
Endpoints with double buffering to increase throughput and ease real-time data transfer for ISOchronous (ISO) transactions
6 MHz crystal oscillator with integrated PLL for low EMI
Built-in software selectable internal 15 kΩ pull-down resistors for HC downstream ports
Dedicated pins for suspend sensing output and wake-up control input for flexible applications
Operation at either +5 V or +3.3 V power supply voltage
Operating temperature range from −40℃ to +85℃
Available in an LQFP64 package (SOT314-2)
SAA1160A 應(yīng)用：
Personal Digital Assistant (PDA)
Digital camera
Third-generation (3-G) phone
Set-Top Box (STB)
Information Appliance (IA)
Photo printer
MP3 jukebox
Game console
圖1。SAA1160A方框圖
[!--empirenews.page--]
圖2。SAA1160A采用內(nèi)部OC的檢測電路
圖3。SAA1160A采用外部OC的檢測電路
圖4。SAA1160A和Hitachi SH-3 (SH7709) RISC處理器的接口電路
下載文檔經(jīng)過幾十年發(fā)展，嵌入式技術(shù)已經(jīng)用在了我們生活中的方方面面，但是嵌入式始終都帶有小眾，專業(yè)性強(qiáng)的屬性，讓很多非嵌入式領(lǐng)域的同學(xué)望而卻步。近十幾年的發(fā)展，物聯(lián)網(wǎng)覆蓋了越來越多領(lǐng)域，包括了家居，商業(yè)，工業(yè)，農(nóng)業(yè)等領(lǐng)域，不僅吸引...
關(guān)鍵字： 嵌入式 物聯(lián)網(wǎng) 技術(shù)隨著IT技術(shù)飛速發(fā)展，互聯(lián)網(wǎng)已經(jīng)進(jìn)入了“物聯(lián)網(wǎng)”時代。物聯(lián)網(wǎng)中需要的大量設(shè)備不在依賴人與人之間的交互產(chǎn)生聯(lián)系，更多通過協(xié)議、通信、程序設(shè)計等方式連接到一處。即 “物聯(lián)網(wǎng)”的目的則是讓所有的物品都具有計算機(jī)的智能但并不以通...
關(guān)鍵字： 嵌入式 物聯(lián)網(wǎng) 計算機(jī)萬物智聯(lián)時代，嵌入式技術(shù)及其應(yīng)用的形態(tài)將更加豐富和多元，同時也將日益呈現(xiàn)深度物理融合、混合架構(gòu)共存、群體智能協(xié)同、網(wǎng)絡(luò)安全攸關(guān)等諸多新的計算特性。顯然，經(jīng)典的嵌入式系統(tǒng)體系結(jié)構(gòu)、軟硬件技術(shù)和開發(fā)方法都已很難應(yīng)對新趨勢下的...
關(guān)鍵字： 嵌入式 物聯(lián)網(wǎng) 計算機(jī)物聯(lián)網(wǎng)是新一代信息技術(shù)的重要組成部分，是互聯(lián)網(wǎng)與嵌入式系統(tǒng)發(fā)展到高級階段的融合。通用計算機(jī)經(jīng)歷了從智慧平臺到互聯(lián)網(wǎng)的獨立發(fā)展道路;嵌入式系統(tǒng)則經(jīng)歷了智慧物聯(lián)到局域智慧物聯(lián)的獨立發(fā)展道路。
關(guān)鍵字： 嵌入式 物聯(lián)網(wǎng) 計算機(jī)隨著工業(yè)4.0、醫(yī)療電子、智能家居、物流管理和電力控制等快速的發(fā)展和推進(jìn)，嵌入式系統(tǒng)利用自身的技術(shù)特點，逐漸成為眾多行業(yè)的標(biāo)配產(chǎn)品。嵌入式系統(tǒng)具有可控制、可編程、成本低等，它在未來的工業(yè)和生活中有著廣闊的應(yīng)用前景。在現(xiàn)在...
關(guān)鍵字： 嵌入式 物聯(lián)網(wǎng) 人工智能長久來看，嵌入式只會越來越火，隨著人工智能時代的發(fā)展，嵌入式必定又將迎來一次浪潮和技術(shù)的巨大變革。人工智能越是想要表達(dá)智能水平，就越要依靠嵌入式技術(shù)，嵌入式技術(shù)將朝著自動化控制和人機(jī)交互發(fā)展。嵌入式因其體積小、可靠性高、...
關(guān)鍵字： 嵌入式 物聯(lián)網(wǎng) 人工智能
