MC68030CRC25C Freescale Semiconductor, MC68030CRC25C Datasheet - Page 71
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MC68030CRC25C
Manufacturer Part Number
MC68030CRC25C
Description
IC MPU 32BIT ENHANCED 128-PGA
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68030FE20C.pdf
(599 pages)
Specifications of MC68030CRC25C
Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
128-PGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
- Current page: 71 of 599
- Download datasheet (23Mb)
2
2,26
extended further. Since displacements can be 32 bits wide, they
dresses. This allows the general register indirect form to be (bd,Rn) or
dress can be directly indexed by one or two registers (refer to Figure 2-6).
calculation (the actual value in the index register remains unchanged). This
to the effective address calculation time. However, when combined with the
tures can be addressed absolutely and then subscripted, (bd,Rn*scale), for
For both the MC68020 and the MC68030, the register indirect modes can be
absolute addresses or the results of expressions that contain absolute ad-
(bd,An,Rn) when the base register is not suppressed. Thus, an absolute ad-
Scaling provides an optional shifting of the value in an index register to the
left by zero, one, two, or three bits before using it in the effective address
is equivalent to multiplying the register by one, two, four, or eight for direct
subscripting into an array of elements of corresponding size using an arith-
metic value residing in any of the 16 general registers. Scaling does not add
appropriate derived modes, it produces additional capabilities. Arrayed struc-
example. Optionally, an address register that contains a dynamic displace-
variation that can be derived is (An,Rn*scale). In the first case, the array
address is the sum of the contents of a register and a displacement, as shown
ment can be included in the address calculation (bd,An,Rn*scale). Another
in Figure 2-7. In the second example, An contains the address of an array
and Rn contains a subscript.
Figure 2-6. Using Absolute Address with Indexes
bd
MC68030 USER'S MANUAL
SYNTAX: (bd,An.Rn)
An
Rn
I
c a n
MOTOROLA
represent
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