| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine capable of controlling a plurality of LEDs and performing a gradation control for smoothly changing brightness of each of the LEDs even in the case of gradation-controlling the LEDs by serially outputted drive data by using fixed time timer interruption processing. SOLUTION: At every fixed time timer interruption processing time, latch signals and switching signals outputted from the output port of a sub integrated board 111 are inputted to a gradation control IC, and the gradation control IC fetches the drive data serially outputted from the serial transmission part of the sub integrated board 111. Then, the gradation control IC outputs gradation drive signals to gradation lamps 49a and 49b on the basis of gradation data included in the drive data. Thus, even when gradation-controlling the LEDs by the serially outputted drive data by using the fixed time timer interruption processing, the plurality of LEDs can be controlled and the gradation control for smoothly changing the brightness of the respective LEDs can be performed. COPYRIGHT: (C)2007,JPO&INPIT
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