发明名称 |
Memory management unit, image forming apparatus, memory management method, and computer program |
摘要 |
A memory management unit for an information processing system includes a controller and a non-volatile memory. The controller controls data writing process. The non-volatile memory, used for storing non-rewritable and rewritable data, is partitioned into a read-only partition to store the non-rewritable data, and a rewritable partition to store the rewritable data including apparatus-specific data including access-restricted data required for activating the information processing system. The access-restricted data is prohibited from being written during normal usage but writable at specific times. The non-rewritable data, stored in the read-only partition, is protected from an abrupt power shutdown occurring when a data writing process is conducted to the rewritable data. The controller stores the access-restricted data to the read-only partition by changing an attribute of the read-only partition of the non-volatile memory from a read-only attribute to a rewritable attribute. |
申请公布号 |
US8103846(B2) |
申请公布日期 |
2012.01.24 |
申请号 |
US20090488835 |
申请日期 |
2009.06.22 |
申请人 |
AIHARA TAKASHI;RICOH COMPANY, LTD. |
发明人 |
AIHARA TAKASHI |
分类号 |
G06F12/00;G06F12/02;G06F12/16 |
主分类号 |
G06F12/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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