| 摘要 |
PURPOSE:To obtain an optional pattern code generating function by constituting a repetitive pattern generating circuit by a FIFO and a simple gate element. CONSTITUTION:A pattern record is outputted from a microcomputer MCP 1 by one word and inputted to a buffer memory 3 via a changeover circuit section 2, then an output ready signal is sent from the memory 3. Then a code is extracted from an output clock, the output of an AND gate 2a goes to '1' by the 1st bit, the circuit section 2 is changed over into a memory loopback loop 6 and the code is inputted again to the memory 3. Thus, the same data is outputted repetitively. Then the output of the AND gate 2b goes to '1' by using the pattern code including the end, the loop 6 is disconnected and the pattern code is outputted via a P/S conversion section 5. |
