| 摘要 |
<p>PURPOSE:To reduce the number of LSI setting signal in a digital signal processor by coping with the number of setting signal with the scale change of ROM capacity and a serial-parallel conversion circuit and changing ROM data when data to be set is changed. CONSTITUTION:A signal to be set in a LSI is preliminarily stored in a memory used exclusively for reading ROM 12. A setting control circuit 13 starts the operation by the cancellation of a reset signal 21, sets an address signal 23, outputs a reading signal and inputs a data signal corresponding to the address signal 23. The inputted data signal 211 is converted into a serial data signal 26 and is outputted with a serial clock signal 25 to a serial-parallel conversion circuit 14. The serial-parallel conversion circuit 14 of a LSI 16 reads a serial data signal 26 in accordance with a serial clock signal 25, performs a serial- parallel conversion of the serial data signal 26 read so far and outputs them to a setting signal 31.</p> |
