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MC68302PV20 Datasheet(PDF) 33 Page - Motorola, Inc

Part No. MC68302PV20
Description  Integrated Multiprotocol Processor User’s Manual
Download  480 Pages
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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MC68302PV20 Datasheet(HTML) 33 Page - Motorola, Inc

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MC68000/MC68008 Core
MOTOROLA
MC68302 USER’S MANUAL
2-3
Figure 2-2. M68000 Status Register
2.2 INSTRUCTION SET SUMMARY
The five data types supported by the M68000 on the MC68302 are bits, binary-coded deci-
mal (BCD) digits (4 bits), bytes (8 bits), words (16 bits), and long words (32 bits).
In addition, operations on other data types, such as memory addresses, status word data,
etc., are provided for in the instruction set. Shown in Table 2-1, the 14 flexible addressing
modes include six basic types:
• Register Direct
• Register Indirect
• Absolute
• Immediate
• Program Counter Relative
• Implied
The capability to perform postincrementing, predecrementing, offsetting, and indexing is in-
cluded in the register indirect addressing modes. Program counter relative modes can also
be modified via indexing and offsetting.
The M68000 instruction set is shown in Table 2-2.
Some basic instructions also have variations as shown in Table 2-3.
Special emphasis has been placed on the instruction set to simplify programming and to
support structured high-level languages. With a few exceptions, each instruction operates
T
S
I2
I1
I0
C
V
Z
N
X
TRACE
MODE
SUPERVISOR
STATE
INTERRUPT
MASK
EXTEND
NEGATIVE
ZERO
OVERFLOW
CARRY
SYSTEM
BYTE
USER
BYTE
0
4
8
10
13
15
CONDITION
CODES


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