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M68HC08 데이터시트(PDF) 79 Page - Freescale Semiconductor, Inc

부품명 M68HC08
상세설명  MC68HC908JB16 Technical Data
PDF  332 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

M68HC08 데이터시트(HTML) 79 Page - Freescale Semiconductor, Inc

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Central Processor Unit (CPU)
MC68HC908JB16 — Rev. 1.1
Technical Data
Freescale Semiconductor
Central Processor Unit (CPU)
79
NOTE:
The location of the stack is arbitrary and may be relocated anywhere in
RAM. Moving the SP out of page 0 ($0000 to $00FF) frees direct
address (page 0) space. For correct operation, the stack pointer must
point only to RAM locations.
6.4.4 Program Counter
The program counter is a 16-bit register that contains the address of the
next instruction or operand to be fetched.
Normally, the program counter automatically increments to the next
sequential memory location every time an instruction or operand is
fetched. Jump, branch, and interrupt operations load the program
counter with an address other than that of the next sequential location.
During reset, the program counter is loaded with the reset vector
address located at $FFFE and $FFFF. The vector address is the
address of the first instruction to be executed after exiting the reset state.
Bit
15
14
13
12
11
10
987654321
Bit
0
Read:
Write:
Reset:
Loaded with Vector from $FFFE and $FFFF
Figure 6-5. Program Counter (PC)



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