| 摘要 |
PURPOSE:To make it possible to process a pulse equivalent to a cycle time by switching a chronograph counter to a chronograph mode and a counting mode where the pulse impressed to an external terminal is counted. CONSTITUTION:An oscillating circuit 1 oscillate a reference frequency, and the reference frequency passes a frequency dividing circuit 3, and the output of a 1/(100)-sec pulse generating circuit 4 is inputted to an AND gate 6 controlled by the output Q of an FF5 which is inverted by a signal SW generated in the chronograph mode. A switching gate 7 is controlled by an FF12 set and reset by a control circuit 20 and switches the output of the AND gate 6 and the signal impressed to an external terminal 11 to impress them to a chronograph counter 13. An NOR gate 16 and an NAND gate 19 make a transmission gate 17 conductive by instruction signals IR0-IR15 to transmit the counted data of the chronograph counter 13 to a data bus 18. |
