| 摘要 |
PURPOSE:To make the data transfer sure, by providing a register, which accepts input data independently of presence or absence of untransferred data, in the precedong stage. CONSTITUTION:The first register 4 which accepts input data and the second register 11 to which the output of the first register 4 is inputted are provided. When a request signal TRGIN2 becomes ''1'', data on a BUSIN3 is set to the register 4. Next, when an FF5 is ''0'', an AND gate 7 is opened, and an FF9 is set to ''1''. The output is returned as a signal TAGOUT10 corresponding to a signal TAGIN. Simultaneously, the signal 10 energizes the register 11, and the output of the register 4 is set to the register 11. |
