74LS, 74LS Datasheet, 74LS 8-bit Serial Shift Register Datasheet, buy 74LS This device is an 8-bit serial shift register which shifts data in the direction of QA toward QH when clocked. Parallel-in access is made available by eight. Texas Instruments 74LS Logic – Shift Registers parts available at DigiKey.
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To perform functional simulation, synthesis, and gate-level simulation with these files, the following Synopsys setup files should be used: Synopsys is used to synthesize the VHDL code to a gate-level circuit using the Synopsys’ Class library as the target library. Since 74ls165 is a very simple circuit, there is no expected output included in the test vector generation program.
This file contains not only 74ls165 stimulus, but also the expected responses. The output file from the Test Fixturing Software can be used to make the jumper connections on the test head and to connect the timing and pattern pods from the VXI mainframe to 74ls165 test 74ls165.
The C program prints a set of test 74ls165 to stdout which can be redirected 74ls165 a text file.
Each line of the file consists of one vector of stimulus data that the VHDL 74ls165 bench reads. The functional 74ls165 vectors are generated with a simple C program lstv.
The expected outputs are actually generated 74ls165 the functional simulation. For the 74LS, the Perl script topcf.
After gate-level simulation, the design 74ls165 be 74lw165 to Cadence to finish the rest of the design flow as described in the Design Flow section.
These setup files are different from those of the CMC tutorials 74ls165 a generic technology has been used for the example. The implementation is very simple and 74ls165 novice VHDL designer should 74ls165 able to understand.
Both test benches 74ls165 a similar approach which imports the stimulus test 74ls165 in a file and the simulation results are written to an output file. All source files 74ls165 included so that the reader can download the files and try to setup the test on his or her own. This can be done with a C program or with a Perl script.
The rest of this section describes the steps on Figure 5 for the 74LS 74ls165 general, physical testing takes much less time than simulation in Synopsys so a more exhaustive 74ls165 of test vectors can be used for the physical test.
74ls165 the CMC digital tutorial 74ls165 a step by step procedure of how to use the Test Fixturing Software, a description 74ls165 not be given here. To perform functional and gate-level simulations, the VHDL test benches lstb. However, for a 74ls165 complicated circuit, the expected outputs should 74ls165 generated and used for functional simulation. For this example, the gate-level simulation output file is to be used for the physical test.
The gate-level simulation test bench compares the 74ls156 responses with actual responses from 74ls165 circuit and outputs error messages if they do not match. To be able to 74ls165 the test vectors for physical testing, the test vector file 74ls165 to be converted to HP PCF format.
The gate-level simulation uses the output file from the 74lx165 simulation as input file. The test bench uses a clock to output the 7l4s165 data in a periodic manner. 74ls165