HC705E5GRSSLASHD datasheet(30/148 Pages) NXP

tên linh kiện	HC705E5GRS/D

Giải thích chi tiết về linh kiện	General Release Specification

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Central Processing Unit (CPU)

General Release Specification

MC68HC705E5 — Rev. 1.0

Central Processing Unit (CPU)

Figure 3-2. Stacking Order

3.3 Accumulator

The accumulator is a general-purpose 8-bit register used to hold

operands and results of arithmetic calculations or data manipulations.

3.4 Index Register

The index register is an 8-bit register used for the indexed addressing

value to create an effective address. The index register may also be

used as a temporary storage area.

INDEX REGISTER

PCL

ACCUMULATOR

CONDITION CODE REGISTER

PCH

STACK

DECREASING

UNSTACK

INCREASING

NOTE: Since the stack pointer decrements during pushes, the PCL is stacked

first, followed by PCH, etc. Pulling from the stack is in the reverse

MEMORY

ADDRESSES

MEMORY

ADDRESSES

Bit 7

654321

Bit 0

Figure 3-3. Accumulator (A)

Bit 7

654321

Bit 0

Figure 3-4. Index Register (X)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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