| 摘要 |
PROBLEM TO BE SOLVED: To lower a clock frequency without lowering the substantial performance of SDRAM access of an image forming device. SOLUTION: A CPU or print data expanding means is equipped with: 2nd memory means of two systems composed of SDRAMs of the same constitution which can be accessed independently; and a memory access control means for writing into the memories of the respective systems of the 2nd memory means alternately when writing successive data from the CPU or print data expanding means and reading the written successive data out of the memories of the respective systems alternately when reading the written successive data out. The CPU or print data expanding means operate on the basis of a program stored in the 1st memory means and access the 2nd memory means through the memory access means. |
