| 摘要 |
<p>PURPOSE: To decrease the number of components and reduce the size by providing a V24/V28-V35 common conversion part, a conversion part dedicated to V24/V28, and a conversion part dedicated to V35, and using an external connection connector in common. CONSTITUTION: An interface conversion part 14 inputs TTL level signals such as communication data and control signals. Sent and received data, a clock signal, etc., have their levels converted by the conversion part 8 dedicated to V24/V28 and conversion part 9 dedicated to V35 and other signals have their levels converted by the V24/V28-V35 common conversion part 7. A dedicated conversion part selection switch(SW) 13 is connected to the side of the conversion part 8 dedicated V24/V28, and the respective level-converted V24/V28 level signals and V24/V28-V35 common signals are outputted to an RS232C special pin assignment connector 10. Further, the SW 13 is connected to the side of the conversion part 9 dedicated to V35 and the V35-level signals and V24/V28-V35 common signals are outputted to the connector 10.</p> |
