MC68030RC25C Freescale Semiconductor, MC68030RC25C Datasheet - Page 389

• Manufacturer Part Number: MC68030RC25C
• Description: IC MPU 32BIT ENHANCED 128-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68030RC25C

• 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: -

IO
10.1.1
10-2
are dedicated coprocessor instructions that utilize the coprocessor capabil-
cessor that provide a given service are transparent to the programmer. That
tocol between the main processor and the coprocessor because this protocol
to the user without appearing separate from the main processor.
terface registers mapped into the memory space of the main processor. To
could conceivably provide capabilities equivalent to a coprocessor for many
applications, the programmer must implement the communication protocol
The communication protocol defined for the M68000 coprocessor interface
that implement the M68000 coprocessor interface are provided in the micro-
code of the MC68030 and are completely transparent to the MC68030 pro-
actual computation is performed by the MC68881 or MC68882 hardware.
The M68000 coprocessor interface design incorporates a number of flexible
capabilities. The physical coprocessor interface uses the main processor ex-
ternal bus, which simplifies the interface since no special-purpose signals
the asynchronous bus, they can operate at different clock frequencies. The
ities. The necessary interactions between the main processor and the copro-
is, the programmer does not need to know the specific communication pro-
is implemented in hardware. Thus, the coprocessor can provide capabilities
In contrast, standard peripheral hardware is generally accessed through in-
use the services provided by the peripheral, the programmer accesses the
peripheral registers with standard processor instructions. While a peripheral
between the main processor and the peripheral necessary to use the pe-
ripheral hardware.
is described in 10.2 COPROCESSOR INSTRUCTION TYPES. The algorithms
grammer's model. For example, floating-point operations are not implemented
in the MC68030 hardware. In a system utilizing both the MC68030 and the
MC68881 or MC68882 floating-point coprocessor, a programmer can use any
of the instructions defined for the coprocessor without knowing that the
are involved. With the MC68030, a coprocessor can use either the asynchron-
ous or synchronous bus transfer protocol. Since standard bus cycles transfer
information between the main processor and the coprocessor, the copro-
cessor can be implemented in whatever technology is available to the co-
a separate system board, or even as a separate computer system.
Since the main processor and a M68000 coprocessor can communicate using
system designer can choose the speeds of a main processor and coprocessor
processor designer. A coprocessor can be implemented as a VLSI device, as
I n t e r f a c e F e a t u r e s
MC68030 USER'S MANUAL
MOTOROLA