INTRODUCTION In the past, adding speech recording and playback capability to a product meant using a digital signal processor or a specialized audio chip. Now, using a simplified Adaptive Differential Pulse Code Modulation(ADPCM) algorithm, these audio capabilities can be added to any PICmicro device. This application note will cover the ADPCM compression and decompression algorithms, performance comparison of all PICmicro devices, and an application using a PIC16C72 micro-controller.DEFINITION OF TERMS step size -value of the step used for quantization of ana-log signals and inverse quantization of a number of steps.quantization -the digital form of an analog input signal is represented by a finite number of steps.adaptive quantization -the step size of a quantizer is dramatically changed with time in order to adapt to a changing input signal.inverse quantizer -a finite number of steps is converted into a digital representation of an analog signal.
上傳時間: 2022-06-20
上傳用戶:
最近入手了Pandaboard的高清攝像頭子板一塊,順便學習了MIPICSI2接口,給各位網友分享一下。這個高清攝像頭采用ov5640芯片,500萬像素,支持自動聚焦,這也是手機和平板里面用得比較多的一種cmos傳感芯片。OV5640同時支持并向和串行數據傳輸,當然串行傳輸(也就是MIPI方式)速度更快,能夠支持更高的分辨率,一般手機里300萬或者500萬像素的攝像頭一般都是MIPI接口。不妨再多提一下MIPI標準,MIPI是做移動應用處理器的幾家巨頭公司成立的聯盟,旨在定義移動應用處理器的接口標準,其全稱為“Mobile Industry Processor Interface”。現在用的比較多是MIPI框架中的攝像頭標準和顯示標準,即MIPICSI和MIPI DSI。CSI代表Camera Serial Interface,而DSI代表Display Serial Interface。現在CSI已經升級到CSI2.0版本,即MIPICSI2接口。本文所提到的Pandaboard 高清攝像頭使用的就是MIPICSI2接口。先貼一個Pandaboard安裝好攝像頭子板的圖片:
上傳時間: 2022-06-24
上傳用戶:jason_vip1
Introduction The Sil9135/Sil9135A HDMI Receiver with Enhanced Audio and Deep Color Outputs is a second-generation dual-input High Definition Multimedia Interface(HDMI)receiver. It is software-compatible with the Sil9133receiver, but adds audio support for DTS-HD and Dolby TrueHD. Digital televisions that can display 10-or 12-bit color depth can now provide the highest quality protected digital audio and video over a single cable. The Sil9135and Sil9135A devices, which are functionally identical, can receive Deep Color video up to 12-bit,1080p @60Hz. Backward compatibility with the DVI 1.0specification allows HDMI systems to connect to existing DVI 1.0 hosts, such as HD set-top boxes and PCs. Silicon Image HDMI receivers use the latest generation Transition Minimized Differential Signaling(TMDS) core technology that runs at 25-225 MHz.The chip comes pre-programmed with High-bandwidth?
上傳時間: 2022-06-25
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開關升壓型鋰電池充電管理芯片FLD5302/3概述 為開關型兩節或三節鋰離子/鋰 聚合物電池充電管理芯片,非常適合于便攜 式設備的充電管理應用。 集電壓和電 流調節器、預充、充電狀態指示和充電截止 適配器自適應等功能于一體,采用 SOP-8 封裝。 對電池充電分為三個階段:預 充( Pre-charge )、恒流(CC/Constant Current)、恒壓(CV/Constant Voltage)過程。 集成過壓及過流保護,確保電芯的 安全。
上傳時間: 2022-06-25
上傳用戶:
eMMC (Embedded Multi Media Card)是MMC協會訂立、主要針對手機或平板電腦等產品的內嵌式存儲器標準規格。eMMC在封裝中集成了一個控制器,提供標準接口并管理閃存,使得手機廠商就能專注于產品開發的其它部分,并縮短向市場推出產品的時間。MMC的應用是對存儲容量有較高要求的消費電子產品。2011年已大量生產的一些熱門產品,如Palm Pre、Amazon Kindle II和Flip MinoHD,都采用了eMMC。為了確認這些產品究竟使用了何種存儲器,iSuppli利用拆機分析業務對它們進行了拆解,發現eMMC身在其中。附件為介紹EMMC5.1標準的數據手冊.
上傳時間: 2022-06-27
上傳用戶:
FU6831 是一款集成 8051 內核和電機控制引擎(ME)的電機驅動專用芯片,8051 內核處理常規事務,ME 處理電機實時事務,雙核協同工作實現各種高性能電機控制。其中 8051 內核大部分指令周期為 1T 或 2T,芯片內部集成有高速運算放大器、比較器、Pre-driver、高速 ADC、高速乘/除法器、CRC、SPI、I2C、UART、多種 TIMER、PWM 等功能,內置高壓 LDO,適用于 BLDC/PMSM 電機的方波、SVPWM/SPWM、FOC 驅動控制。預驅動為 3P3N Predriver 輸出。
標簽: fu6831
上傳時間: 2022-07-09
上傳用戶:
FU6831/11 是一款集成 8051 內核和電機控制引擎(ME)的電機驅動專用芯片,8051 內核處理常規事務,ME 處理電機實時事務,雙核協同工作實現各種高性能電機控制。其中 8051 內核大部分指令周期為 1T 或 2T,芯片內部集成有高速運算放大器、比較器、Pre-driver(FU6811 除外)、高速 ADC、高速乘/除法器、CRC、SPI、I2C、UART、多種 TIMER、PWM 等功能,內置高壓 LDO,適用于BLDC/PMSM 電機的方波、SVPWM/SPWM、FOC 驅動控制。預驅動類型為:FU6811 為 Gate Driver 輸出;FU6831 為 3P3N Predriver 輸出。
標簽: FU6831
上傳時間: 2022-07-09
上傳用戶:
protel99se元件庫包含Protel常用封裝庫、Protel常用元件庫等比較全面的資料,主要是各大集成芯片廠家元器件的PCB封裝庫。對電子行業的朋友們來說可是非常有用的。本站提供Protel99se免費版下載。 Protel99se是一款已經成功pj的設計電路原理圖和PCB的專業軟件,它是由ProklTechnology開發出來的電路板設計軟件,擁有功能強大、界面簡潔、易學易懂等特點。 同時protel99se軟件具有豐富的設計功能,能進行原理圖的設計、印制電路板的設計、PCB板的設計等功能,還可以設計32個信號層,16個地電層,16個機械層,是目前網絡上最流行的電路板設計軟件。
標簽: protel軟件下載
上傳時間: 2022-07-22
上傳用戶:canderile
The GD32F103xx device is a 32-bit general-purpose microcontroller based on the ARM?Cortex?-M3 RISC core with best ratio in terms of processing power, reduced power consumption and peripheral set. The Cortex?-M3 is a next generation processor core whichis tightly coupled with a Nested Vectored Interrupt Controller (NVIC), SysTick timer and advanced debug support.The GD32F103xx device incorporates the ARM ' Cortex?-M3 32-bit processor core operating at 108 MHz frequency with Flash accesses zero wait states to obtain maximumefficiency. It provides up to 3 MB on-chip Flash memory and up to 96 KB SRAM memory. An extensive range of enhanced I/Os and peripherals connected to two APB buses. The devices offer up to three 12-bit ADCs, up to two 12-bit DACs, up to ten general-purpose
標簽: gd32f103
上傳時間: 2022-07-23
上傳用戶:aben
RK3328手冊RK3328 is a high-performance Quad-core application processor designed for Smart STB(Set Top Box) including OTT/IPTV/DVB. It is a high-integration and cost efficient SOC for 4KHDR STB.Quad-core Cortex-A53 is integrated with separate Neon and FPU coprocessor, also withshared L2 Cache. The Quad-core GPU supports high-resolution display and game.Lots of high-performance interface to get very flexible solution, such as multi-channeldisplay including HDMI2.0a and TV Encoder (CVBS). TrustZone and crypto hardware areintegrated for security. 32bits DDR3/DDR3L/DDR4/LPDDR3 provides high memorybandwidth.
上傳時間: 2022-08-10
上傳用戶: