发明名称 Systems for non-volatile storage of data and postage meter systems.
摘要 <p>A system for the nonvolatile storage of data, such as a postage meter system, employs a microcomputer (104) coupled to two nonvolatile memories (106, 108). The first MNOS nonvolatile memory (106) requires data to be applied for more than a predetermined time for data to be written into a said nonvolatile memory (106) while the second EEPROM nonvolatile memory (108) is such that data applied for less than the predetermined time is sufficient for data to be written into the second nonvolatile memory (108). Each nonvolatile memory (106, 108) has address and data lines, which are coupled to microcomputer ports such that the MNOS memory data lines are always at a high value whenever the EEPROM memory (108) is addressed for the purpose of writing or reading. In the postage meter system transactional accounting data records are stored in the nonvolatile memory (106, 108). The most current record can be rapidly identified. A program store causes the microcomputer, when an error is detected in at least one of the nonvolatile memory records, to rewrite data into both the full record and the abbreviated data record stored in the nonvolatile memory (106, 108). <IMAGE></p>
申请公布号 EP0457114(A1) 申请公布日期 1991.11.21
申请号 EP19910107126 申请日期 1986.10.16
申请人 PITNEY BOWES INC. 发明人 KROLL, PAUL C.;CHANG, SUNG S.
分类号 G06F11/00;G06F11/14;G07B17/00 主分类号 G06F11/00
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