MC68030RC33C Freescale Semiconductor, MC68030RC33C Datasheet - Page 281

• 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: -

8
8-14
8.1.9 Interrupt Exceptions
8.1.8 Format Error Exception
tion after it loads the status register. Upon return from the trace handler
the processor never enters the stopped condition.
Just as the processor checks that prefetched instructions are valid, the pro-
cessor (with the aid of a coprocessor, if needed) also performs some checks
format word for a cpRESTORE instruction and the stack frame format for an
The RTE instruction checks the validity of the stack format code. For long
version number of the processor to that contained in the frame at memory
The cpRESTORE instruction passes the format word of the coprocessor state
frame to the coprocessor for validation. If the coprocessor does not recognize
the format value, it signals the MC68030 to take a format error exception.
of coprocessor-related exceptions.
stacked data is improper, the instruction generates a format error exception.
This exception saves a short format stack frame, generates exception vector
vector. The stacked program counter value is the logical address of the in-
When a peripheral device requires the services of the MC68030 or is ready
to send information that the processor requires, it may signal the processor
to take an interrupt exception. The interrupt exception transfers control to a
The STOP instruction does not perform its function when it is traced. A STOP
of data values for control operations, including the coprocessor state frame
RTE instruction.
bus cycle fault format frames, the RTE instruction also compares the internal
location SP+54 (SP+$36). This check ensures that the processor can cor-
rectly interpret internal state information from the stack frame.
Refer to SECTION 10 COPROCESSOR INTERFACE DESCRIPTION for details
If any of the checks previously described determine that the format of the
number 14, and continues execution at the address in the format exception
struction that detected the format error.
instruction that begins execution with T1 = 1 and TO = 0 forces a trace excep-
routine, execution continues with the instruction following the STOP, and
routine that responds appropriately.
MC68030 USER'S MANUAL
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