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C161 Datasheet(PDF) 166 Page - Infineon Technologies AG |
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C161 Datasheet(HTML) 166 Page - Infineon Technologies AG |
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166 / 400 page  &3, 7KH([WHUQDO%XV ,QWHUIDFH User’s Manual 9-2 1999-08 9.1 Single Chip Mode Single chip mode is entered, when pin EA is high during reset. In this case register BUSCON0 is initialized with 0000 H, which also resets bit BUSACT0, so no external bus is enabled. In single chip mode the C161PI operates only with and out of internal resources. No external bus is configured and no external peripherals and/or memory can be accessed. Also no port lines are occupied for the bus interface. When running in single chip mode, however, external access may be enabled by configuring an external bus under software control. Single chip mode allows the C161PI to start execution out of the internal program memory (Mask-ROM, OTP or Flash memory). Note: Any attempt to access a location in the external memory space in single chip mode results in the hardware trap ILLBUS. |
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