| 摘要 |
PURPOSE:To execute efficiently a processing by using a program base part recurrently and repeatedly from the setting of a command type to the 1st parameter up to a receiving character processing routine. CONSTITUTION:When the reception of one character has been completed by a serial bit transmitting/receiving circuit 3, a data ready interruption is generated in a CPU4. In the interruption processing routine of a microprogram for the data ready interruption, the 8-bit data for one character are read out in parallel from the circuit 3. The read-out data are stored in the address of a receiving character buffer pointed out by a writing point of the CPU4 and the writing pointer is updated so as to point out the succeeding address. Then, a receiving bit in a status word is set up to '1'. The interruption routine is driven every end of the bit reception of a new one character by the circuit 3 and respective character of the received command are successively stored in a receiving character buffer of the CPU4 as they are. |
