| 摘要 |
PURPOSE:To decrease the frequency of data transmission processing and improve the data processing efficiency by clearing old stored channel specification data before data specifying a channel using parameter data are stored. CONSTITUTION:When an address signal and a data signal corresponding to clear data are sent out in corresponding to operation on a keyboard, etc., the latch of a channel specification data storage part 30 is cleared. Then an address signal and a data signal for specifying a specific channel are sent out and when a write instruction signal is sent out in one-byte units of channel specification data, the channel specification data are stored in the latch of the channel specification data storage part 30. Then when an address signal specifying a specific kind of parameter and a data signal indicating a specific value are sent out, parameter data of the specific value are stored in parameter storage parts 20-1 to 20-n corresponding to the channels specified by the channel specification data. |
