IEC 61691-1-1:2011
(Main)Behavioural languages - Part 1-1: VHDL Language Reference Manual
Behavioural languages - Part 1-1: VHDL Language Reference Manual
IEC 61691-1-1:2011(E) Revises and enhances the VHDL language reference manual (LRM) by including a standard C language interface specification. The VHDL language was defined for use in the design and documentation of electronics systems. It is revised to incorporate capabilities that improve the language's usefulness for its intended purpose as well as extend it to address design verification methodologies that have developed in industry. These new design and verification capabilities are required to ensure VHDL remains relevant and valuable for use in electronic systems design and verification. Incorporation of previously separate, but related standards, simplifies the maintenance of the specifications. This publication has the status of a double logo IEEE/IEC standard.
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IEC 61691-1-1
Edition 2.0 2011-05
™
IEEE Std 1076
INTERNATIONAL
STANDARD
Behavioural languages –
Part 1-1: VHDL Language Reference Manual
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IEC 61691-1-1
Edition 2.0 2011-05
™
IEEE Std 1076
INTERNATIONAL
STANDARD
Behavioural languages –
Part 1-1: VHDL Language Reference Manual
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XH
ICS 25.040, 35.060 ISBN 978-2-88912-440-4
- i - IEC 61691-1-1:2011(E)
IEEE Std 1076-2008
Contents
1. Overview of this standard . 1
1.1 Scope. 1
1.2 Purpose. 1
1.3 Structure and terminology of this standard. 2
2. Normative references. 5
3. Design entities and configurations. 7
3.1 General. 7
3.2 Entity declarations . 7
3.3 Architecture bodies . 10
3.4 Configuration declarations. 13
4. Subprograms and packages. 19
4.1 General. 19
4.2 Subprogram declarations . 19
4.3 Subprogram bodies . 23
4.4 Subprogram instantiation declarations. 26
4.5 Subprogram overloading. 26
4.6 Resolution functions . 29
4.7 Package declarations. 30
4.8 Package bodies. 31
4.9 Package instantiation declarations . 33
4.10 Conformance rules. 34
5. Types. 35
5.1 General. 35
5.2 Scalar types . 36
5.3 Composite types. 44
5.4 Access types. 53
5.5 File types. 55
5.6 Protected types. 58
5.7 String representations . 61
6. Declarations . 63
6.1 General. 63
6.2 Type declarations. 64
6.3 Subtype declarations . 64
6.4 Objects . 66
6.5 Interface declarations. 73
6.6 Alias declarations. 89
6.7 Attribute declarations. 92
6.8 Component declarations . 93
6.9 Group template declarations . 93
6.10 Group declarations. 93
6.11 PSL clock declarations. 94
Published by IEC under license from IEEE. © 2008 IEEE. All rights reserved.
IEEE Std 1076-2008
7. Specifications. 95
7.1 General. 95
7.2 Attribute specification. 95
7.3 Configuration specification. 98
7.4 Disconnection specification. 103
8. Names . 107
8.1 General. 107
8.2 Simple names. 108
8.3 Selected names. 108
8.4 Indexed names . 111
8.5 Slice names . 112
8.6 Attribute names. 112
8.7 External names. 113
9. Expressions . 117
9.1 General. 117
9.2 Operators. 118
9.3 Operands . 131
9.4 Static expressions. 139
9.5 Universal expressions . 142
10. Sequential statements. 145
10.1 General. 145
10.2 Wait statement . 145
10.3 Assertion statement. 147
10.4 Report statement . 148
10.5 Signal assignment statement. 149
10.6 Variable assignment statement . 160
10.7 Procedure call statement . 163
10.8 If statement . 164
10.9 Case statement . 164
10.10Loop statement. 166
10.11Next statement . 167
10.12Exit statement . 167
10.13Return statement . 168
10.14Null statement . 168
11. Concurrent statements. 169
11.1 General. 169
11.2 Block statement. 169
11.3 Process statement. 170
11.4 Concurrent procedure call statements. 172
11.5 Concurrent assertion statements .
...
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