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介绍M68HC1引导程序模式的工作和应用
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2009-06-19
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The M68HC11 Family of MCUs (microcontroller units) has a bootstrap
mode that allows a user-defined program to be loaded into the internal
random-access memory (RAM) by way of the serial communications
interface (SCI); the M68HC11 then executes this loaded program. The
loaded program can do anything a normal user program can do as well
as anything a factory test program can do because protected control bits
are accessible in bootstrap mode. Although the bootstrap mode is a
single-chip mode of operation, expanded mode resources are
accessible because the mode control bits can be changed while
operating in the bootstrap mode.
mode that allows a user-defined program to be loaded into the internal
random-access memory (RAM) by way of the serial communications
interface (SCI); the M68HC11 then executes this loaded program. The
loaded program can do anything a normal user program can do as well
as anything a factory test program can do because protected control bits
are accessible in bootstrap mode. Although the bootstrap mode is a
single-chip mode of operation, expanded mode resources are
accessible because the mode control bits can be changed while
operating in the bootstrap mode.
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