MC68030FE16C Freescale Semiconductor, MC68030FE16C Datasheet - Page 294
MC68030FE16C
Manufacturer Part Number
MC68030FE16C
Description
IC MPU 32BIT ENHANCED 132-CQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68030FE20C.pdf
(599 pages)
Specifications of MC68030FE16C
Processor Type
M680x0 32-Bit
Speed
166MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-CQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
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8.2 BUS FAULT RECOVERY
MOTOROLA
the faulty frame can be left to be used by another processor of a different
four-word or a bus fault stack frame below the frame that it was attempting
to use. In this way, the faulty stack frame remains intact. The exception
type (e.g., an MC68010, MC68020, or a future M68000 processor) when ap-
An address error exception or a bus error exception indicates a bus fault.
The saving of the processor state for a bus error or address error is described
the exception is taken immediately after the bus cycle terminates. Bus errors
the address of the pipe stage B word is the value in the program counter
the address of the stage B word; the address of the stage C word is the
handler can examine or repair the faulty frame. In a multiprocessor system,
propriate.
RTE instruction is described in 8.1.13 Return from Exception.
reported by the on-chip MMU are also processed immediately. A bus error
occurring during an instruction stream access is not processed until the
have provided. For instruction faults, when the short format frame applies,
counter plus two. For the long format, the long word at SP+$24 contains
address of the stage B word minus two. Address error faults occur only for
instruction stream accesses, and the exceptions are taken before the bus
cycles are attempted.
Processor accesses of either data items or the instruction stream can result
'n bus errors. When a bus error exception occurs while accessing a data item,
processor attempts to use the information (if ever) that the access should
plus four, and the address of the stage C word is the value in the program
n 8.1.2 Bus Error Exception, and the restoring of the ~3rocessor state by an
MC68030 USER'S MANUAL
8-27
8
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