| 摘要 |
PURPOSE:To obtain the memory controller which can shorten a memory check time at the time of system boot strapping. CONSTITUTION:In a regular memory access, a main CPU 13 used a data bus 15, an address bus 21, and a control bus 22, and executes an access to RAM blocks 11-0 to 11-n through address convertion/RAM control parts 34-0 to 34-n, and selector parts 35-0 to 35-n, respectively. On the other hand, at the time of system boot strapping sub-CPUs 32-0 to 32-n provided on every RAM block execute a memory check in parallel with respect to each RAM block through the selector parts 35-0 to 35-n, respectively. The selector parts 35-0 to 35-n select one of the main CPU 13 or the sub-CPUs 32-0 to 32-n. |
