The Student's Guide to VHDLElsevier Science, 1998. gada 15. janv. - 312 lappuses VHDL is a language for describing digital electronic systems. A vital, efficient step in the system design process, VHDL allows for the design and simulation of a hardware system prior to it actually being manufactured. Offering the same clear, accessible style as The Designer's Guide to VHDL, The Student's Guide is designed as a main text for introductory VHDL courses, and as a supplementary text for courses that require VHDL-based project work, such as computer architecture, digital design, and digital logic courses. This new condensed text also serves as a quick, self-teaching guide for practicing engineers who need to learn only the basics of VHDL.
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... { waveform when boolean_expression else } waveform [ when boolean_expression ] ; The conditional signal assignment allows us to specify which of a number of wave- forms should be assigned to a signal depending on the values of some ...
... waveform is chosen . So we might rewrite the model for the asymmetric delay element shown in Figure 5-12 as asym_delay : z < = transport a after Tpd_01 when a = ' 1 ' else a after Tpd_10 ; One problem with conditional signal assignments ...
... { waveform when boolean_expression else } waveform ; The delay mechanism is restricted to the keyword transport . The final waveform may not be conditional . Furthermore , we may not use the keyword unaffected . If the required behavior ...
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Fundamental Concepts | 1 |
X | 22 |
A Scalar Data Types and Operations | 27 |
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Digital Integrated Circuit Design: From VLSI Architectures to CMOS Fabrication Hubert Kaeslin Ierobežota priekšskatīšana - 2008 |