| 摘要 |
<p>PURPOSE:To transfer data to a bus mouse interface (BMI) of a reception part by providing a pulse circuit on a transmission part to output a 2-phase pulse train and using a counting circuit and a reading circuit of the reception part to constitute BMI. CONSTITUTION:The X and Y pulse circuits of a pulse circuit 11 of a pulse data transmission part 9 output the X and Y 2-phase pulse trains and transfer four pieces of data, for example, in the transfer processing of a single time divided into the former and latter halves. A CPU 27 of a pulse data reception part 10 reads sequentially the data on the X and Y counters via BMI when two pieces of data of the former half are selected. Then the CPU 27 carries on the addition processing until the counted values of both X and Y counters are equal to 0 respectively. Similarly, two pieces of data of the latter half are received. These operations are repeated to carry out the communication of data at every four pieces.</p> |
