mc68hc705c4acfn Freescale Semiconductor, Inc, mc68hc705c4acfn Datasheet - Page 45

• Manufacturer Part Number: mc68hc705c4acfn
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

3.3.1 Accumulator
3.3.2 Index Register
MC68HC705C4A • MC68HSC705C4A — Rev. 3.0
MOTOROLA
Reset:
The accumulator (A) shown in
register. The CPU uses the accumulator to hold operands and results of
arithmetic and non-arithmetic operations.
Read:
In the indexed addressing modes, the CPU uses the byte in the index
register (X) to determine the conditional address of the operand
3-3). For more information on indexed addressing, see
No
Offset.
Reset:
The 8-bit index register also can serve as a temporary data storage
location.
Write:
Read:
Write:
Offset,
Bit 7
Bit 7
12.3.6 Indexed, 8-Bit
Central Processor Unit (CPU)
6
6
Figure 3-3. Index Register (X)
Figure 3-2. Accumulator (A)
5
5
Figure 3-2
Unaffected by reset
Unaffected by reset
4
4
Offset, and
3
3
is a general-purpose 8-bit
12.3.7 Indexed, 16-Bit
Central Processor Unit (CPU)
2
2
12.3.5 Indexed,
1
1
CPU Registers
Technical Data
(Figure
Bit 0
Bit 0
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