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ELANSC520 数据表(PDF) 42 Page - Advanced Micro Devices |
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ELANSC520 数据表(HTML) 42 Page - Advanced Micro Devices |
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42 / 440 page  System Address Mapping Registers 2-10 Élan™SC520 Microcontroller Register Set Manual Programming Notes This register must be written as a full 32-bit doubleword. When the MMCR alias is enabled, the 4-Kbyte address range to which the alias is mapped becomes the MMCR, regardless of any PARx registers that are enabled in the same 4-Kbyte address range. In effect, the MMCR alias has higher priority than any of the PARx windows that are enabled. 11 –8 Reserved Reserved This bit field should be written to 0 for normal system operation. 7 –0 MATCH[7 –0] Match The bit field is used to prevent illegal writes to this register. The data pattern written to this byte must be CBh. If any other data pattern is written to these bits, the entire 32-bit write is ignored. This bit field returns 0 when read. Bit Name Function |
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