| 摘要 |
<p>PURPOSE:To easily synchronize operations by providing a circuit which determines a master or slave mode in accordance with the input signal of a terminal other than a reset terminal. CONSTITUTION:A synchronizing logic circuit is provided with a circuit which takes in the signal from a terminal LPEN at the time of reset. When the master mode will be set, an external multiplexer 8 is used to forcibly set the input from the terminal LPEN at the time of reset to '1'. By this operation, a signal 104 obtained by delaying an input 103 from the terminal LPEN is latched at the rise of reset to enter into the master mode. When the slave mode will be set, an external multiplexer 16 is used to forcibly set the input from the terminal LPEN at the time of reset to '0'. By this operation, a signal 113 obtained by delaying an input 112 from the terminal LPEN is latched at the fall of a reset signal 102 to enter into the slave mode.</p> |
