tailieunhanh - Draft of IEEE Standard VHDL Language Reference Manual

Mục đích của tiêu chuẩn này là để xác định chính xác VHDL. Các khán giả chính của nó là implementor của các công cụ hỗ trợ ngôn ngữ và người sử dụng tiên tiến của ngôn ngữ. Người sử dụng khác được khuyến khích sử dụng sách thương mại có sẵn, hướng dẫn, và các lớp học để học ngôn ngữ ở một số chi tiết trước khi đọc sổ tay này. | IEEE Std P1076a-1999 2000 D3 IEEE Standard VHDL Language Reference Manual Section Clause1 0 I Overview of this standard This section clause2 describes the purpose and organization of this standard the IEEE Standard VHDL Language Reference Manual. Intent and scope of this document The intent of this standard is to define VHDL accurately. Its primary audiences are the implementor of tools supporting the language and the advanced user of the language. Other users are encouraged to use commercially available books tutorials and classes to learn the language in some detail prior to reading this manual. These resources generally focus on how to use the language rather than how a VHDL-compliant tool is required to behave. At the time of its publication this document was the authoritative definition of VHDL. From time to time it may become necessary to correct and or clarify portions of this standard. Such corrections and clarifications may be published in separate documents. Such documents modify this standard at the time of their publication and remain in effect until superseded by subsequent documents or until the standard is officially revised. Structure and terminology of this document This manual is organized into sections clauses3 each of which focuses on some particular area of the language Every fifth line of each section clause4 not including section clause5 headings footers and the section clause6 title is numbered in the left Within each section clause8 individual constructs or concepts are discussed in each clause subclause9. Each clause subclause10 describing a specific construct begins with an introductory paragraph. Next the syntax of the construct is described using one or more grammatical productions. 1. To conform to IEEE rules. 2. To conform to IEEE rules. 3. To conform to IEEE rules. 4. To conform to IEEE rules. 5. To conform to IEEE rules. 6. To conform to IEEE rules. 7. The editor has been unable to generate either paragraph or line