Freescale Semiconductor, Inc.
GENERAL RELEASE SPECIFICATION
SECTION 3
CENTRAL PROCESSING UNIT
This section describes the five CPU registers. CPU registers are not part of the
memory map.
3.1
Accumulator (A)
The accumulator is a general purpose 8-bit register used to hold operands and
results of arithmetic calculations or data manipulations.
7
0
A
3.2
Index Register (X)
The index register is an 8-bit register used for the indexed addressing value to
create an effective address. The index register also may be used as a temporary
storage area.
7
0
X
3.3
Condition Code Register (CCR)
Rev. 2.0
3-1
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