HCS12 datasheet(17/452 Pages) FREESCALE

tên linh kiện	HCS12

Giải thích chi tiết về linh kiện	HCS12 Microcontrollers

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S12CPUV2 Reference Manual, Rev. 4.0

Freescale Semiconductor

1.3.2 Memory and Addressing

— 8-bit memory location pointed to by the effective

address of the instruction

M : M+1

— 16-bit memory location. Consists of the contents of the

location pointed to by the effective address

concatenated with the contents of the location at the

next higher memory address. The most significant byte

is at location M.

M~M+3

M(Y)~M(Y+3)

— 32-bit memory location. Consists of the contents of the

effective address of the instruction concatenated with

the contents of the next three higher memory locations.

The most significant byte is at location M or M(Y).

M(X)

— Memory locations pointed to by index register X

M(SP)

— Memory locations pointed to by the stack pointer

M(Y+3)

— Memory locations pointed to by index register Y plus 3

PPAGE

— Program overlay page (bank) number for extended

memory (>64 Kbytes).

Page

— Program overlay page

— High-order byte

— Low-order byte

( )

— Content of register or memory location

— Hexadecimal value

— Binary value

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