This Tetris-Clone was assembled from one ATmega8, 240 red LEDs, a few BJTs, a few IC s and some push-buttons.
標(biāo)簽： Tetris-Clone assembled few ATmega
上傳時(shí)間： 2016-05-29
上傳用戶：ZJX5201314
Designing Boards with Atmel AT89C51,AT89C52, AT89C1051, and AT89C2051 for Writing Flash at In-Circuit Test. Recent improvements in chips and testers have made it possible for the tester to begin taking over the role tradi-tionally assigned to the PROM program-mer. Instead of having a PROM pro- grammer write nonvolatile memories before assembling the board, the in-cir- cuit tester writes them during in-circuit testing operations. Many Teradyne Z18- series testers are now in use loading code into nonvolatile memories, micro- controllers and in-circuit programmable logic devices. The purpose of this note is to explain how the Z18 approaches the writing task for Atmel AT89C series IC’s, so that designers of boards using these chips can get the best results.
上傳時(shí)間： 2013-11-17
上傳用戶：xiaozhiqban
Designing Boards with Atmel AT89C51, AT89C52, AT89C1051, and AT89C2051 for Writing Flash at In-Circuit Test:Recent improvements in chips andtesters have made it possible for thetester to begin taking over the role traditionallyassigned to the PROM programmer.Instead of having a PROM programmerwrite nonvolatile memoriesbefore assembling the board, the in-circuittester writes them during in-circuittesting operations. Many Teradyne Z18-series testers are now in use loadingcode into nonvolatile memories, microcontrollersand in-circuit programmable logic devices. The purpose of this note is to explain how the Z18 approaches the writing task for Atmel AT89C series IC’s,so that designers of boards using these chips can get the best results.
標(biāo)簽： Designing Boards Atmel with
上傳時(shí)間： 2013-11-20
上傳用戶：lijianyu172
多遠(yuǎn)程二極管溫度傳感器-Design Considerations for pc thermal management Multiple RDTS (remote diode temperature sensing) provides the most accurate method of sensing an IC’s junction temperature. It overcomes thermal gradient and placement issues encountered when trying to place external sensors. PCB component count decreases when using a device that provides multiple inputs.Better temperature sensing improves product performance and reliability. Disk drive data integrity suffers at elevated temperatures. IBM published an article stating that a 5°C rise in operating temperature causes a 15% increase in the drive’s failure rate. The overall performance of a system can be improved by providing a more accurate temperature measurement of the most critical devices allowing them to run just a few degrees hotter.The LM83 directly senses its own temperature and the temperature of three external PN junctions. One is dedicated to the CPU of choice, the other two go to other parts of your system that need thermal monitoring such as the disk drive or graphics chip. The SMBus-compatible LM83 supports SMBus timeout and logic levels. The LM83 has two interrupt outputs; one for user-programmable limits and WATCHDOG capability (INT), the other is a Critical Temperature Alarm output (T_CRIT_A) for system power supply shutdown.
標(biāo)簽： Considerat Design 遠(yuǎn)程 二極管
上傳時(shí)間： 2014-12-21
上傳用戶：ljd123456
從應(yīng)用角度介紹了ADSP21160 DSP 芯片的基本性能, 并用ADSP21160 實(shí)現(xiàn)了基本的陣列信號(hào)測(cè)向算法- MU S IC 算法1 著重討論了如何利用ADSP21160 的結(jié)構(gòu)和開(kāi)發(fā)環(huán)境來(lái)提高程序的執(zhí)行效率, 滿足系統(tǒng)設(shè)計(jì)的要求。 關(guān)鍵詞: SHARC DSP 陣列信號(hào)處理 MU S IC 測(cè)向算法
上傳時(shí)間： 2014-01-07
上傳用戶：lht618
Microchip s DSP IC dsPIC33 demo code for Explorer 16. It include a LCD some LEDs and some keys. Just very simple.
標(biāo)簽： some Microchip Explorer include
上傳時(shí)間： 2013-12-10
上傳用戶：sclyutian
S-35390A是可以在超低消耗電流、寬工作電壓范圍內(nèi)工作的2線CMOS實(shí)時(shí)時(shí)鐘IC。工作電 壓為1.3 ~ 5.5 V、可適用于從主電源電壓到備用電池電壓的寬幅電源電壓。通過(guò)0.25 μA的計(jì) 時(shí)消耗電流和寬范圍的計(jì)時(shí)電源電壓，可大幅度地改善電池的持續(xù)時(shí)間。在使用備用電池工 作的系統(tǒng)中，內(nèi)置的自由寄存器可作為用戶備用存儲(chǔ)器來(lái)使用。在主電源切斷前存儲(chǔ)在寄存 器中的信息，可在電壓恢復(fù)后的任何時(shí)候讀出。 本產(chǎn)品因?yàn)閮?nèi)置了時(shí)鐘校正功能，所以可以在很寬的范圍內(nèi)校正因振蕩電路的頻率偏差所導(dǎo) 致的時(shí)鐘數(shù)據(jù)的提前或滯后。通過(guò)此功能和溫度傳感器的結(jié)合，可根據(jù)溫度變化來(lái)對(duì)時(shí)鐘進(jìn) 行校正，從而實(shí)現(xiàn)不受環(huán)境溫度影響的高精度的計(jì)時(shí)功能
上傳時(shí)間： 2016-10-16
上傳用戶：壞壞的華仔
s document describe davicom ic dm9000 DM9000_h.h . this ic can be used in the embedded systems and network lan cards. its is 10/100Mpbs ic.
標(biāo)簽： 9000 document describe embedded
上傳時(shí)間： 2013-12-10
上傳用戶：xyipie
( 從太原市公交查詢系統(tǒng)建立的必要性出發(fā), 進(jìn)行了公交查詢算法的研究, 主要探討了包括最短路徑查 詢及最少花費(fèi)查詢及數(shù)據(jù)庫(kù)管理的公交查詢系統(tǒng)的實(shí)現(xiàn)。 該系統(tǒng)采用了V ISU AL BA S IC 610 為開(kāi)發(fā)工具, M ICRO SO FT A CCESS2003 為后臺(tái)數(shù)據(jù)庫(kù), 開(kāi)發(fā)了基于太原市公交線路的公交查詢系統(tǒng)。具有線路查詢、換乘 查詢、 站點(diǎn)查詢、 數(shù)據(jù)管理等一系列功能。
標(biāo)簽： ISU 查詢系統(tǒng) 查詢 AL
上傳時(shí)間： 2017-08-31
上傳用戶：asddsd
將現(xiàn)行的供暖計(jì)費(fèi)方式由按建筑面積計(jì)費(fèi)變?yōu)榘聪牡臒崮苡?jì)費(fèi)是供暖計(jì)費(fèi)方式發(fā)展趨勢(shì)，為了滿足這一計(jì)費(fèi)方式變化的需要，設(shè)計(jì)了基于IC卡的預(yù)付費(fèi)式新型供暖計(jì)費(fèi)系統(tǒng)，通過(guò)測(cè)量用戶采暖系統(tǒng)進(jìn)出口的溫度和流量，計(jì)算用戶消耗的熱能，利用IC卡記錄用戶預(yù)付費(fèi)的金額和當(dāng)年熱能的單價(jià)，根據(jù)熱能消耗和當(dāng)年熱能的單價(jià)計(jì)算用戶采暖費(fèi)，根據(jù)實(shí)際發(fā)生的供暖費(fèi)用和預(yù)付費(fèi)金額控制供暖的開(kāi)停，這一計(jì)費(fèi)方式的變化使供暖計(jì)費(fèi)更趨合理。 Abstract: It is trend that the mode of heat charging is changed from billing by building area to by thermal energy. In order to meet the needs of heat charging mode changing， a new system of heat charging based on IC card is proposed. The user?蒺s energy consumption is calculated by measuring the user inlet and outlet temperature and flow，using the IC card to record the prepaid amount and the current price of heat. The user?蒺s heating costs is calculated according to energy consumption and current price， according to actual heating costs and prepaid amount，the system controls the heating opening or stopping. It is more reasonable that calculated heating costs by user heat consumption
標(biāo)簽： IC卡 計(jì)費(fèi) 系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2013-10-14
上傳用戶：大融融rr
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