| 摘要 |
<p>PURPOSE:To transmit a specified command from a high-order device to a low- order device without providing a new signal line by providing a specified signal reception means which allows the low-order device to execute the specified command when a specified signal is received in a reception part. CONSTITUTION:A specified signal generation means 9 transmitting the line and specified signal to a clock signal transmission line 6 and a data signal transmission line 7 at the time of transmitting the specified command is provided in a low-order device control part 1, and the specified signal reception means 10 which allows the low-order device 5 to execute the specified command when the specified signal is received is provided on the reception part 3. The specified signal generation means 9 of the high-order device 2 transmits the specified signal to the clock signal transmission line 6 and the data signal transmission line 7, and the specified signal reception means 10 of the low-order device 5 allows the low-order device 5 to execute the specified command when the specified signal is received in the reception part 3. Thus, the low-order device 5 is allowed to execute the specified command without especially providing the new signal line.</p> |
