| 摘要 |
<p>PURPOSE:To securely and simply record data on an outbreak phenomenon by writing data before and after triggering distinctively without any data absence. CONSTITUTION:The predata before trigger generation is written in an area 1 of a RAM 8 and the postdata after the trigger generation is written in an area 2 of the RAM 8. The data recorded in the RAM 8 can be transferred to an external storage device and used, and can also be transferred to a CPU 7 and processed, but the trigger generation point is decided clearly in either case, so the predata and post data can be analyzed distinctively. Further, the data are written in the RAM 8 in synchronism with a sampling clock, which is inputted continuously to a DMAC9, so there is no data absence at the time of switching. Consequently, the data recording device which suits to the recording of data on an outbreak phenomenon such as an earthquake is obtained.</p> |
