PERIPHERAL DEVICE CONTROL CIRCUIT AND ELECTRONIC CIRCUIT

PROBLEM TO BE SOLVED: To provide a peripheral device control circuit that outputs a control signal output from a CPU to a peripheral device as an optimal control signal synchronous with a clock signal. SOLUTION: An edge detection part 22 detects a leading edge or trailing edge of a CS signal to output an edge detection signal. Upon input of the edge detection signal, a peripheral device selection part 25 captures various selection signals from an address decoding part 21 to determine which of a plurality of peripheral devices is operated. In dependence on the determination result, any of CSB1-3 signals, and a WRB signal or an RDB signal are output. COPYRIGHT: (C)2004,JPO