Introduction - If you have any usage issues, please Google them yourself
Nine nine multiplication table system, ARH signal in low level can be manually input multiplier, the multiplicand ARH high level automatic generation, the multiplicand multiplication multiplier is 99. In the automatic process if ARH is set to 0, then pause the current generation, the multiplicand multiplication multiplier, can be an external input, when ARH returns to the high level of the 1, it returns the multiplicand and multiplier pause, continue down the operation. Has a reset restart function of START signal.