MC68030RC33C Freescale Semiconductor, MC68030RC33C Datasheet - Page 451

• Manufacturer Part Number: MC68030RC33C
• Description: IC MPU 32BIT ENHANCED 128-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68030RC33C

• Processor Type: M680x0 32-Bit
• Speed: 33MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 128-PGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

IO
10.5.1.5 FORMAT ERRORS. Format errors are the only coprocessor-detected ex-
10.5.1.4
10-64
which the exception was detected and the point in the instruction execution
this word to determine if it is valid (refer to 10.2.3.3 COPROCESSOR CONTEXT
the invalid format code in the restore CIR. When the main processor reads
the invalid format code, it aborts the coprocessor instruction by writing an
then performs exception processing using a four-word pre-instruction stack
frame and the format error exception vector number 14. Thus, if the exception
to the coprocessor. The actions taken by the coprocessor and the main pro-
cessor depend on the type of exception that occurs.
When an address or bus error is detected by a DMA coprocessor, the co-
exception handling routines in system-accessible registers. The coprocessor
should place one of the three take exception primitives encoded with an
appropriate exception vector number in the response CIR. Which of the three
at which the main processor should continue after exception processing.
ceptions that are not signaled to the main processor with a response pri-
during the execution of a cpRESTORE instruction, the coprocessor decodes
SAVE INSTRUCTION). If the format word is not valid, the coprocessor places
abort mask (refer to 10.3.2 Control CIR) to the control CIR. The main processor
cpRESTORE instruction when the RTE instruction in the handler is executed.
forms format error exception processing as outlined for the cpRESTORE
ceptions detected by a DMA coprocessor include those associated with bus
activity and any other exceptions (interrupts, for example) occurring external
processor should store any information necessary for the main processor
primitives is used depends upon the point in the coprocessor instruction at
mitive. When the main processor writes a format word to the restore CIR
handler does not modify the stack frame, the MC68030 restarts the
If the coprocessor returns the invalid format code when the main processor
reads the save CIR to initiate a cpSAVE instruction, the main processor per-
instruction.
COPROCESSOR SYSTEM-RELATED EXCEPTIONS.
MC68030 USER'S MANUAL
System-related ex-
MOTOROLA