Development Of An 8-Bit Fpga-Based Asynchronous Risc Pipelined Processor For Data Encryption
Microprocessors are widely used in various applications. One of the application is in the area of data security where data are encrypted and decrypted before and after transfer via communication channel. The microprocessor design can be categorized into two types, which are synchronous and asynch...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
2003
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/12210/1/FK_2003_48.pdf |
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| Summary: | Microprocessors are widely used in various applications. One of the application is in
the area of data security where data are encrypted and decrypted before and after
transfer via communication channel. The microprocessor design can be categorized
into two types, which are synchronous and asynchronous processors. The
asynchronous processor may offer better speed improvement because it is self-timed
where a control circuit will generate enable signals for all instruction executions
based on the request and acknowledgement signals. Unlike the asynchronous design,
synchronous design requires global clock. The clock must be long enough to
accommodate the worst-case delay.
In this work, an 8-bit asynchronous processor is designed based on a
synchronous RISC pipe lined processor architecture. The synchronous processor
consists of three stages. They are instruction fetch stage, instruction decode stage
and execution stage. The reduce instruction set computer (RISC) architecture is used
to minimize the instruction and to perform specific operation. To design the asynchronous processor, an asynchronous control circuit is added to synchronous
design. The asynchronous control circuit is designed based on handshake protocol.
Both the synchronous and asynchronous designs are applied fully using
VHDL. The MAX+PLUS II is used as the simulation tools to design and for design
verification. The UP1 education board that contains the FLEX10K chip is used to
observe the hardware operation.
The asynchronous processor was successfully designed with higher million
instructions per second (MIPS) and higher operation frequency as compared to
synchronous processor. The asynchronous processor has 10.772 MIPS and operated
under frequency of 11. 16MHz. The asynchronous processor design consumed 63%
of the total logic cells in FLEX10K chip. The processor fits in FLEX10K and
provides extra spaces for future expansion. |
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