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ispLSI device application of high-speed PLL


ol option, the establishment of a macro block shown in Figure 4, DPLL divider of the two macro blocks are available to achieve this. One Q3, Q2, Q1,[link widoczny dla zalogowanych], Q0 as the output of the counter, CAo = O3O2O1Q0 as a divider output. Menu shown in Table 1. Counter output O3O2O1Q0 = 1111, the role of the next clock after the Q3Q2Q1Q0 = 133D2D1130, the ABELHDL, Module described as follows: * 80 * 2004 Communications Science and Technology iv D3 DD DPLL block diagram of Figure 3ispLSI2032 achieve VEN03. C3LKQ021DD21O0DOCDULDCAOCD Figure 4 Table 1 divider macroblock menu MoDULECDUCLK, CD, ENPIN; D3 ... D0; LDPIN; Q3 ... Q0PINISTYPE'REG ': CAoPINISTYPE' ∞ M ': COUNT = [Q3 ... Q0]; DATA = lD3 ... EDf . EQUATIoNS ∞ UNT. CLK = CLK ∞ UNT. AR = CDWHEN (o0UNT == D15) THEN ∞ UNT: = jDA7ELSEWHEN (! EN &! LD) THEN ∞ UNT: = (o0UNT.FB); ELSEwHEN (EN &! LD) THEN ∞ UNT: = (∞ UNT.FB +1); ELSEWH bang N (LD) THEN ∞ UNT: = DATACAO = Q3. Q & Q2. Q & Q1. Q & Q0. QEND Select Schematic (schematic diagram) way of input device and the PFD CDU macroblock grouped together, design input and output pins,[link widoczny dla zalogowanych], the compiler generates. JED file. DPLL implemented by isp2032 pin shown in Figure 5,[link widoczny dla zalogowanych], which, Ref reference rate for the input, UP, DN is the phase detector output. VCCDOD1D2D31-Ke-f76543j932tIP102spLSI/1118192021DD0 ... ... DD3 DPLL implementation plans 5ispLSI2032 pin Figure 3 Simulation of the frequency synthesizer circuit uses ISPSynarioStarter software design and simulation. Preset counters M and N, respectively 12 (D3D2D1cO = 1100) and 8 (DD3DD2DE) 1DID = 1000) when the frequency waveform. Figure 6. Figure 6 shows. After the preset in the circuit, Fout is divided VCO 4 (16-12 = 4), V for the VCO divided by 8 (16-8:; by the Figure 7, V R, for the reference waveform leading or lagging , UP and DN can output the corresponding waveform, making the VCO can detect changes in R and v of the wave. Figure 6, 8 and 12 preset number of frequency when the input waveform monk out of the mouth figure 7PD waveform relationship (a) R y, ahead of the wave (b) R wave when the delay y 4 Conclusion ispLSI2032 PLL chip design to solve the speed of the PLL. Common digital PLL circuit maximum operating frequency of 1200kHz. High-speed PLL designed using ispLSI2032, the highest frequency up to 180MHz, the foot of the pin delay is only 3ms. Erasable in-system programming in more than 1 million,[link widoczny dla zalogowanych], making the circuit dynamic configuration, without changes to hardware greatly increase the circuit integration. Received :2004 -03-10 (Continued from page 7 a social need to manage, every industry needs management, shipping safety as inseparable from the development and management. Water safety supervision and management for production and business purpose of creating a favorable external environment for enterprises to create fair competition environment, therefore, continue to strengthen supervision and management of water safety and strict law enforcement, according to the law of water, the maintenance of water traffic safety, promote shipping industry objective needs of development. But at the same time, we must also recognize that if only emphasizes the neglect of supervision and management of hospitality, not only from the purpose of supervision, may also lead managers in the enforcement process count on the status of the condescending, arrogant, not a comprehensive, fair, objective look at problems, not listen to negative comments. Even abuse of power, arbitrary charges, and levies, excessive fines, supervision and management of our reputation, damage the image of the traffic law enforcement to disrupt the healthy and orderly development of the shipping market, a fundamental breach of harm to people's interests. Received date :2004-01 Second J5
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