Bootloader是微處理器上電時運行的第一段代碼，它可以通過通信接口實現(xiàn)對微處理器內(nèi)部應(yīng)用程序的更新升級，為網(wǎng)絡(luò)化嵌入式產(chǎn)品的應(yīng)用程序升級帶來極大的便利。由于目前沒有統(tǒng)一嵌入式系統(tǒng)的Bootloader。基于NEC 78K0系列單片機自編程原理，設(shè)計出一個適用于78K0/Fx2系列單片機的Bootloader，并能夠通過單片機串口在線升級應(yīng)用程序。 Abstract: Bootloader is the first piece of code executed after microprocessor startup. It makes the embedded product’s firmware update conveniently through communication interface. However， no unified bootloader is available for all kinds of microprocessor products. Based on the principle of self-programming NEC 78K0s’ series， a useful Bootloader which is suitable for 78K0/Fx2s’ series MCU is designed，the design can update the application through serial ports.
標(biāo)簽： Bootloader MCU 自編程
上傳時間： 2013-10-26
上傳用戶：fang2010
The SN65LBC170 and SN75LBC170 aremonolithic integrated circuits designed forbidirectional data communication on multipointbus-transmission lines. Potential applicationsinclude serial or parallel data transmission, cabledperipheral buses with twin axial, ribbon, ortwisted-pair cabling. These devices are suitablefor FAST-20 SCSI and can transmit or receivedata pulses as short as 25 ns, with skew lessthan 3 ns.These devices combine three 3-state differentialline drivers and three differential input linereceivers, all of which operate from a single 5-Vpower supply.The driver differential outputs and the receiverdifferential inputs are connected internally to formthree differential input/output (I/O) bus ports thatare designed to offer minimum loading to the buswhenever the driver is disabled or VCC = 0. Theseports feature a wide common-mode voltage rangemaking the device suitable for party-lineapplications over long cable runs.
上傳時間： 2013-10-13
上傳用戶：ytulpx
The bootloader is stored in the internal boot ROM memory (system memory) of STM32devices. It is programmed by ST during production. Its main task is to download theapplication program to the internal Flash memory through one of the available serialperipherals (USART, CAN, USB, etc.). A communication protocol is defined for each serialinterface, with a compatible command set and sequences
上傳時間： 2014-09-06
上傳用戶：417313137
FEATURES400 MSPS internal clock speedIntegrated 10-bit DAC32-bit tuning wordPhase noise ≤ –120 dBc/Hz @ 1 kHz offset (DAC output)Excellent dynamic performance>75 dB SFDR @ 160 MHz (±100 kHz offset) AOUTserial I/O control1.8 V power supplySoftware and hardware controlled power-down48-lead TQFP/EP packageSupport for 5 V input levels on most digital inputsPLL REFCLK multiplier (4× to 20×)Internal oscillator; can be driven by a single crystalPhase modulation capabilityMultichip synchronization
上傳時間： 2014-12-04
上傳用戶：axin881314
NEC 16位MCU參考手冊 The 78K0R/IC3 is a 16-bit single-chip microcontroller that uses a 78K0R CPU core and incorporates peripheral functions, such as ROM/RAM, a multi-function timer, a multi-function serial interface, an A/D converter, a programmable gain amplifier (PGA), a comparator, a real-time counter, and a watchdog timer.
上傳時間： 2013-11-02
上傳用戶：努力努力再努力
The CAT25128 is a 128−Kb serial CMOS EEPROM device internally organized as 16Kx8 bits. This features a 64−byte page write buffer and supports the serial Peripheral Interface (SPI) protocol. The device is enabled through a Chip Select (CS) input. In addition, the required bus signals are clock input (SCK), data input (SI) and data output (SO) lines. The HOLD input may be used to pause any serial communication with the CAT25128 device. The device featuressoftware and hardware write protection, including partial as well as full array protection.
標(biāo)簽： 25128 EEPRO CMOS CAT
上傳時間： 2013-11-15
上傳用戶：fklinran
The CAT34C02 is a 2 kb serial CMOS EEPROM, internallyorganized as 16 pages of 16 bytes each, for a total of 256 bytes of 8 bitseach.
上傳時間： 2013-10-23
上傳用戶：ppeyou
CAT5110/18/19/23/24/25 linear-taper digitally programmable potentiometers perform the same function as a mechanical potentiometer or a variable resistor. These devices consist of a fixed resistor and a wiper contact with 32-tap points that are digitally controlled through a2-wire up/down serial interface.
上傳時間： 2013-11-22
上傳用戶：541657925
用戶程序示例教程 The Blinky project is a simple program for the LPC2138using Keil MCB2130 Microcontroller Board. It blinks the LEDs at speed according to the Potentiometer setting and prints the current seting to the serial Port 1.In addition it generates a sine wave with an adjustable frequency on the speaker of the board.
上傳時間： 2014-12-27
上傳用戶：hongmo
以典型的9S08 系列為例，當(dāng)你選擇了一個MCU 型號后，在圖1-4 右側(cè)會顯示出所有針對該型號芯片可用的項目調(diào)試場景。其中：Full Chip Simulator”是芯片全功能模擬仿真，即無需任何目標(biāo)系統(tǒng)的硬件資源，直接在你的PC 機上模擬運行單片機的程序，在模擬運行過程中可以觀察調(diào)試程序的各項控制和運行流程，分析代碼運行的時間，觀察各種變量，等等。CW 提供了功能強大的模擬激勵功能，可以在模擬運行時模擬一些外部事件的輸入，配合程序調(diào)試；P&E Multilink/Cyclone Pro”是基于P&E 公司的硬件調(diào)試工具實現(xiàn)實時在線硬件調(diào)試。實際就是我們經(jīng)常說的BDM 調(diào)試。BDM 調(diào)試是基于芯片本身內(nèi)含的在線調(diào)試功能，可實現(xiàn)程序下載，單步／全速運行，可以設(shè)若干個斷點，可以觀察和修改任意寄存器或RAM 內(nèi)存空間。BDM 幾乎是開發(fā)飛思卡爾8 位（9S08 和RS08 系列）、16 位（9S12 系列）和32 位（Coldfire V1 系列）單片機的標(biāo)準(zhǔn)調(diào)試模式，運用最為廣泛；SofTec HCS08”是另外一家SofTec 公司提供的硬件調(diào)試工具，國內(nèi)使用較少；HCS08 serial Monitor”是基于芯片串口的監(jiān)控調(diào)試開發(fā)模式。由于開發(fā)效率較低，現(xiàn)在幾乎無人使用。
標(biāo)簽： FSL 08 C語言編程 單片機開發(fā)
上傳時間： 2013-10-10
上傳用戶：alex wang
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