| 摘要 |
<p>PURPOSE:To make the CPU 1 refer to the block data in an ROM with one instruction only and to relieve the burden in a CPU, by read out consecutive block data by only transmitting a start address to the ROM. CONSTITUTION:A start address of an ROM 3 is transmitted on an address line 17 in the form of a parallel data from a microcomputer 9 and transmitted on an address line 18 in the form of serial data. The readout operation of an ROM data is started from the address outputted from an address counter 13. An address register 15 is added with an adder/subtractor 16. The address of the ROM 3 is renewed by every +1 or -1, allowing the ROM 3 to continuously pick up data. Thus, since the computer 9 transmits the start address only, the burden can be relieved.</p> |
