| 摘要 |
PURPOSE:To perform simultaneous serial input and output actions and also to realize a random access action by connecting a reading register to each memory element together with both random and serial access buses connected to the reading register respectively. CONSTITUTION:An image memory contains memory elements M0-M7 and writing registers WR0-WR7 are connected to the input parts of elements M0-M7 together with the reading registers RR0-RR7 connected to the output parts of elements M0-M7 respectively. Then a random access bus 1 and a serial access bus 2 are connected to those registers WR0-WR7 and RR0-RR7 respectively. Then the selected writing register WRi (i=0-7) is set under an output state and a write signal is applied to the memory element Mi corresponding to the register WRi. Thus a random access writing action is secured. At the same time, the only memory element Mi is set under a reading state and only the corresponding reading register RRi is set under an output state. Thus a random access reading action is secured. |
