| 摘要 |
<p>PURPOSE:To constitute a data transmission circuit by one memory by dividing one memory circuit into two depending on its addresses and switching the divided circuits alternately so as to access a signal from a host circuit. CONSTITUTION:In confirming a ready state depending on the state of the ready signal (a) of a control circuit 3, a host circuit 1 writes a data to the transmission buffer A of the memory circuit 2 depending on a buffer identification signal (d) at the Q output of a flip-flop 4. Then a buffer acessing the host circuit 1 is changed into the transmission buffer B of the memory circuit 2 by using a buffer switching signal (c) and a data is written to the transmission buffer B. Then a data signal (e) is sent synchronously with a frame pulse signal (f) outputted from the host circuit 1. In writing the data into the transmission buffer A of the memory circuit 2 from the host circuit 1 again, the buffer is change into the transmission buffer B, from which the data is transmitted.</p> |
