| 摘要 |
PURPOSE:To constitute the system cheaply and reset a slave side microcomputer surely by providing an abnormality detecting circuit in a main side microcomputer and performing resetting control effectively. CONSTITUTION:By turning a power source on, voltage by a Zener diode 7 is impressed to converters 5, 6, and voltage of a point A rises slowly by time constant of a capacitor C1 and a resistance R1, and output of L level is generated. Accordingly resetting is made to a main microcomputer 1 and resetting is also made to slave side microcomputers 21, 23. When divided voltage by resistances R2, R3 exceeds voltage due to the Zener diode 7, output of converters 5, 6 becomes H and resetting is released. When programs of slave side 21, 23 run away, the main side 1 outputs L for a specified time, and stops supply of power source to a power source for reset releasing of slave side and makes resetting. Thus, resetting control is performed effectively. |
