| 摘要 |
PURPOSE:To prevent useless loss of data and overheating of a driving section by operating an initial resetting circuit in a certain time after any uncontrollable action of a CPU in a control circuit of a dot printer with the CPU. CONSTITUTION:Now when a CPU40 starts an uncontrollable action in a dot printer control circuit due to a noise or the like, no resetting signal S3 is sent out from the CPU40 and a division circuit 20 moves H in the (n) division output S4 after the time T1 to turn ON a transistor Tr, which causes a capacitor C to be discharged in an initial resetting circuit 30. A data reception forbidding signal A from an interface circuit 60 moves to H by an initial resetting signal S2 to stop the data transmission from a host system 70 regardless of the state of the signal D from the CPU40 thereby preventing useless loss of data. The signal S2 causes a gate 80 to be closed to cut off a solenoid drive signal E thereby preventing overheating due to continuous electric energization of a solenoid drive circuit 50. |
