| 摘要 |
PURPOSE:To simplify structure and reduce cost, by selectively and cyclically reading data as set according to a vehicle speed data and a count output from a counter. CONSTITUTION:An A/D converter 1 converts a vehicle speed signal as received to 5 bit digital signals A6-A10 and supplies the digital signals to ROM2. An oscillator 3 generates a pulse signal having a constant period and supplies the same to a counter 4. A count result is supplied as 6 bit count outputs A0-A5 to the ROM2. Some memory areas are addressed by the digital signals from the A/D converter 1, and data is read from the counter 4. The data D0 as read is supplied to a controller 5, and simultaneously supplied as a reset signal to the counter 4. The controller 5 controls to drive a wiper motor 6 according to the data D0 as received. |
