MC68030FE20C Freescale Semiconductor, MC68030FE20C Datasheet - Page 459

• Manufacturer Part Number: MC68030FE20C
• Description: IC MPU 32BIT ENHANCED 132-CQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68030FE20C

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-CQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

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10.5.2.8 ADDRESS AND BUS ERRORS.
10.5.3 C o p r o c e s s o r Reset
10.6 C O P R O C E S S O R
10-72
That is, the processor takes an F-line emulator exception when a bus error
forms bus error exception processing as described in 8.1.2
tions. After the exception handler has corrected the cause of the bus error,
the main processor can return to the point in the coprocessor instruction at
which the fault occurred.
An address error occurs if the MC68030 attempts to prefetch an instruction
from an odd address. This can occur if the calculated destination address of
can occur during main processor bus cycles to CPU space to communicate
with a coprocessor or during memory cycles run as part of the coprocessor
emulator exception as described in 10.5.2.2 F-LINE EMULATOR EXCEPTIONS.
occurs during the initial access to a CIR by a coprocessor instruction. If a bus
error occurs on any other coprocessor access or on a memory access made
during the execution of a coprocessor instruction, the main processor per-
a cpBcc or cpDBcc instruction is odd or if an odd value is transferred to the
scanPC with the transfer status register and the scanPC response primitive.
a bus fault as described in
devices of a system. The system designer can design a coprocessor to be
coprocessor is an extension to the main processor programming model and
to the internal state of the MC68030.
instruction execution. If a bus error occurs during the coprocessor interface
register access that is used to initiate a coprocessor instruction, the main
processor assumes that the coprocessor is not present and takes an F-line
If an address error occurs, the MC68030 performs exception processing for
Either an external reset signal or a RESET instruction can reset the external
reset and initialized by both reset types or by external reset signals only. To
be consistent with the MC68030 design, the coprocessor should be affected
by external reset signals only and not by RESET instructions, because the
Coprocessor instruction formats are presented for reference. Refer to the
M68000PM/AD,
mation on coprocessor instructions.
M68000 Programmer's Reference Manual,
S U M M A R Y
MC68030 USER'S MANUAL
8.1.3 Address Error Exception.
Coprocessor-instruction-related bus faults
for detailed infor-
Bus Error Excep-
MOTOROLA