发明申请
US20070133280A1 Semiconductor integrated circuit apparatus and electronic system
审中-公开
半导体集成电路设备和电子系统
- 专利标题： Semiconductor integrated circuit apparatus and electronic system
- 专利标题（中）： 半导体集成电路设备和电子系统
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申请号： US10583778申请日： 2004-10-08
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公开(公告)号： US20070133280A1公开(公告)日： 2007-06-14
- 发明人: Masashi Oshiba , Hiroshi Kishi , Yoshiaki Sato , Yoko Yamaki , Kentaro Yamakawa
- 申请人： Masashi Oshiba , Hiroshi Kishi , Yoshiaki Sato , Yoko Yamaki , Kentaro Yamakawa
- 专利权人： RENESAS TECHNOLOGY CORP.
- 当前专利权人： RENESAS TECHNOLOGY CORP.
- 国际申请： PCT/JP04/14939 WO 20041008
- 主分类号： G11C16/04
- IPC分类号： G11C16/04
摘要：
A flash memory is provided with a protect area PA in which reading of a specific block is prohibited. A RAM to be used as a work area of a program is provided with a protect area PA1 in which reading of a specific block is prohibited. A bus state controller 3 compares a value of a program counter and a value of an address signal to prohibit reading in areas other than the protect area PA in the flash memory and to prohibit reading of data of protect area PA1 in the RAM other than reading from the protect area PA of the flash memory. For instance, when a user reads data of the protect area PA from a user access area to which the user can access, senseless data such as H'FFFF are output from the bus state controller 3 via a data bus.
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