| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem, in the storage of 10-bit or 12-bit data, the unit data bit length of which is not a multiple of 8 in a memory (with a bit width of 8, 16 bits), that a second memory IC is needed, or waste of a space memory is caused. <P>SOLUTION: There are provided between an input-side data bus and a memory data bus five 16-bit buffer registers 13 having the same bit width as the memory, a data distribution circuit 11 for sorting data received from a requesting source to each buffer register, and a selection circuit 12 for selecting one of the buffer registers to take it as writing data to the memory. The buffer registers are adapted so that each group partitioned by 10 bits from the head (the bit length of data) from the head bit of the buffer register 13-1 to the tail bit of the final buffer register 13-5 is the strove unit of the writing data, and the data distribution circuit 11 distributes 10-bit data received in each group. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
