| 摘要 |
PURPOSE:To increase extremely the scroll operating speed, etc. of a picture processing memory by providing a transfer mode to select an optional word line and to read the information on all cells on a word line onto each bit line and then selecting other word lines to write the data on each bit line to all cells of other word lines. CONSTITUTION:An added transfer enable signal generating circuit GEN sets a transfer enable signal TE at H to inhibit the actions of bit line resetting circuits BR0-BR511 when a transfer signal -TR is set at L, i.e., a shift command of data is given for each word line. For instance, transistors Q7 and Q8 are cut off or the signal TE is sent to a generating circuit for signal phiBR to inhibit the generation of the signal phiBR for a period TE=H. At the same time, a column decoder CD is set under an inactive state in the same period to avoid selection of columns. In other words, no precharge is pesrformed by the circuits BR0-BR511 in a reading cycle nor no selection of columns is carried out by the decoder CD. |
