The VHDL Cookbook phần 2 pptx
The VHDL Cookbook phần 2 pptx
... aggregate In the simplest case, the target of the assignment is an object name, and the value of the expression is given to the named object. The object and the value must have the same base type. 2- 2 The ... purposes. 2. 1. Lexical Elements 2. 1.1. Comments Comments in VHDL start with two adjacent hyphens (‘ ’) and extend to the end of the line. They have no par...
Ngày tải lên: 08/08/2014, 03:20
The VHDL Cookbook phần 6 pptx
... in 7-4 The VHDL Cookbook PHI1 PHI2 RESET FETCH READ WRITE A_BUS D_BUS READY DP 32 Figure7 -2. DP 32 port diagram. phi1 phi 2 Figure7-3. DP 32 clock waveforms. 7 .2. Bus Architecture The DP 32 processor ... ready. The processor accepts the data, and completes the transaction. On the other hand, if the memory has not yet supplied the data by the end of the T2 stat...
Ngày tải lên: 08/08/2014, 03:20
Examples of VHDL Descriptions phần 2 pptx
... ERROR; http://www.ami.bolton.ac.uk/courseware/adveda/vhdl/vhdlexmp.html (1 2 of 67) [ 2 3/1/ 2 00 2 4:15:08 ] Examples of VHDL Descriptions Y21 <= '0' when (B2 = '0') and ((A2 = '1') and (G2BAR = '0')) ... '1'; Y 22 <= '0' when (B2 = &a...
Ngày tải lên: 08/08/2014, 01:21
The VHDL Cookbook phần 3 pps
... Furthermore, these items shadow any things with the same names declared outside the subprogram. When the subprogram is called, the statements in the body are executed until either the end of the ... the subprogram statement body, and may not be assigned to. The actual parameter associated with incr when the procedure is called must be an expression. Given the mode of t...
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The VHDL Cookbook phần 4 ppsx
... transactions on the signal reset, then suspends for the rest of the simulation. On the other hand, if there are references to signals in the waveform value expressions or conditions, then the wait statement ... select alu_result <= op1 + op2 when alu_add | alu_incr, op1 – op2 when alu_subtract, op1 and op2 when alu_and, op1 or op2 when alu_or, op1 and not op2 when alu_mask; 4 -...
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The VHDL Cookbook phần 5 pot
... 0 R0 R255 PC VNZ • • • CC Figure 7-1. DP 32 registers. 7. Sample Models: The DP 32 Processor This chapter contains an extended example, a description of a hypothetical processor called the DP 32. The ... with an empty array as the parameter, and should handle that case appropriately. The example above handles it by returning the value H, the pulled-up value. 7 -2 The VHDL...
Ngày tải lên: 08/08/2014, 03:20