| 摘要 |
<p>PURPOSE:To attain a small size and low cost and to avoid the transmission and the display of erroneous data by giving one data of a tuner and a deck to a microcomputer controlling the other, allowing the microcomputer to display the data on a display device and sending the data while establishing the frame synchronization between the microcomputers. CONSTITUTION:The dummy frame of all '0' (or 1) is outputted at least once and a test data sending request (TEXT NO.) of the same pattern is outputted by one frame succeedingly attended with a clock from a display control microcomputer (microcomputer 16 for tuner). Since two dummy frames are consecutive in an example shown in figure, 0s of 12-bit are aranged in total. The other micro-computer (microcomputer 20 for deck) receiving the said data regards it as the reception of TEXT NO. of all 0s (NO.0) to return the TEXT data. The tuner microcomputer 16 analyzes the received TEXT data based on the sending timing of the own TEXT NO.0.</p> |
