本文用VHDL在CPLD器件上實(shí)現(xiàn)一種8 b數(shù)字頻率計(jì)測(cè)頻系統(tǒng),能夠用十進(jìn)制數(shù)碼顯示被測(cè)信號(hào)的頻率,不僅能夠測(cè)量正弦波、方波和三角波等信號(hào)的頻率,而且還能對(duì)其他多種物理量進(jìn)行測(cè)量。具有體積小、可靠性高、功耗低的特點(diǎn)。
標(biāo)簽: VHDL CPLD 器件 數(shù)字頻率計(jì)
上傳時(shí)間: 2013-12-18
上傳用戶:sy_jiadeyi
這是一個(gè)三次樣條插值的.m程序 輸入的是一個(gè)二維數(shù)組A(Nx2) 插值方法為: S(x) = A(J) + B(J)*( x - x(J) ) + C(J)*( x - x(J) )**2 +D(J) * ( x - x(J) )**3 for x(J) <= x < x(J + 1)
上傳時(shí)間: 2013-12-14
上傳用戶:gengxiaochao
移位乘法器的輸入為兩個(gè)4位操作數(shù)a和b,啟動(dòng)乘法器由stb控制,clk信號(hào)提供系統(tǒng)定時(shí)。乘法器的結(jié)果為8位信號(hào)result,乘法結(jié)束后置信號(hào)done為1. 乘法算法采用原碼移位乘法,即對(duì)兩個(gè)操作數(shù)進(jìn)行逐位的移位相加,迭代4次后輸出結(jié)果。具體算法: 1. 被乘數(shù)和乘數(shù)的高位補(bǔ)0,擴(kuò)展成8位。 2. 乘法依次向右移位,并檢查其最低位,如果為1,則將被乘數(shù)和部分和相加,然后將被乘數(shù)向左移位;如果為0,則僅僅將被乘數(shù)向左移位。移位時(shí),被乘數(shù)的低端和乘數(shù)的高端均移入0. 3. 當(dāng)乘數(shù)變成全0后,乘法結(jié)束。
上傳時(shí)間: 2014-01-03
上傳用戶:星仔
ADM6993F/FXFiber to Fast Ethernet Converter (TS1000 CPE Complied) The ADM6993F/FX is a single chip integrating two 10/100 Mbps MDIX TX/FX transceivers, a three-port 10/100M Ethernet L2 switch controller, and one OAM engine to meet demanding applications, including Fiber-to-Ethernet media converters, especially the fiber to the home (FTTH) media converters. The ADM6993F/FX feature set includes link pass through (LPT), TS1000 OAM frame receiving/processing/transmitting, programmable link status LED display, various loop-back modes, and one configurable MII ports for snooping/inserting OAM frame from/to 100Fx. The ADM6993FX is the environmentally friendly “green” package version.
標(biāo)簽: 6993 ADM Converter Ethernet
上傳時(shí)間: 2014-01-01
上傳用戶:hebmuljb
一個(gè)電子產(chǎn)品開發(fā)時(shí)的部分c代碼B!絕對(duì)能用!
標(biāo)簽: 電子 產(chǎn)品開發(fā) 分 代碼
上傳時(shí)間: 2013-12-20
上傳用戶:許小華
一個(gè)電子產(chǎn)品開發(fā)時(shí)的部分c代碼B!絕對(duì)能用!
標(biāo)簽: 電子 產(chǎn)品開發(fā) 分 代碼
上傳時(shí)間: 2016-09-05
上傳用戶:515414293
The P89LPC938 is a single-chip microcontroller, available in low cost packages, based on a high performance processor architecture that executes instructions in two to four clocks, six times the rate of standard 80C51 devices. Many system-level functions have been incorporated into the P89LPC938 in order to reduce component count, board space, and system cost.
標(biāo)簽: microcontroller single-chip available packages
上傳時(shí)間: 2013-12-04
上傳用戶:遠(yuǎn)遠(yuǎn)ssad
自己的51開發(fā)板源代碼B,里面包含有LCD1602實(shí)驗(yàn),lcd12864實(shí)驗(yàn),ps2 lcd1602,串口通訊,紅外遙控,計(jì)算器,繼電器控制,矩陣鍵盤等實(shí)驗(yàn)程序,內(nèi)容豐富
上傳時(shí)間: 2016-09-06
上傳用戶:wab1981
ILI9325 Datasheet a-Si TFT LCD Single Chip Driver 240RGBx320 Resolution and 262K color
標(biāo)簽: Resolution Datasheet Driver Single
上傳時(shí)間: 2016-09-07
上傳用戶:Pzj
W.B.Gragg改進(jìn)的解微分方程組的解法,為改進(jìn)中點(diǎn)法,并給出解一個(gè)方程組得例子。
上傳時(shí)間: 2016-09-20
上傳用戶:wangdean1101
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