| 摘要 |
PURPOSE:To prevent collision of data signals on the bus due to the control signal skew by adding the control signal holding function and resetting function at the control input terminal of a tri-state buffer. CONSTITUTION:A signal T1 from a timing generator 14 and input signals CI1-CIm are fed to the decoder 10 and a signal to be fed to the bus 12 is selected from data DI1-DIn based on the decoded output CO1-COn. The decoded output CO1-COn from the decoder 10 are fed to the set input terminals S of the Tri-state buffers 131-13n with a set/reset function, and the output Tr of the timing generator 14 is fed to the reset input terminal R. Collision is prevented by providing a period in which all the tri-state buffers 131-13n are brought to tri-state simultaneously. |
