| 摘要 |
An electronic circuit device has a high-density mount board ( 2 ), on which are disposed a microcomputer ( 3 ) and random access memory ( 7 ) which are connected to each other through an exclusive memory bus ( 12 ) for high-speed data transfer, a programmable device ( 8 ) which is a variable logic circuit represented by FPGA, and an electrically-rewritable nonvolatile memory ( 16 ) which can store the operation program of the microcomputer. The high-density mount board has external mounting pins on the bottom surface so that it can be mounted on a mother board in the same manner as a system on-chip multi-chip module. With an intended logic function being set on the programmable device, a hardware-based function to be realized by the electronic circuit device can be simulated. With an operation program being written to the nonvolatile memory, a software-based function to be realized can be simulated. Consequently, the device facilitates the debugging at early stages of system development, configures a prototype system, and contributes to the time reduction throughout the system development, prototype fabrication and large-scale production.
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