MC68030RC20C Freescale Semiconductor, MC68030RC20C Datasheet - Page 458

• Manufacturer Part Number: MC68030RC20C
• Description: IC MPU 32BIT ENHANCED 128-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68030RC20C

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 128-PGA
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 20MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Operating Supply Voltage (min): 4.75V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 128
• Package Type: PGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Compliant

10.5.2.7 FORMAT ERRORS.
MOTOROLA
10.5.2.6 INTERRUPTS.
tions, can occur at any instruction boundary. Interrupts are also serviced
The MC68030 uses the ten-word mid-instruction stack frame when it services
Thus, it can continue the coprocessor instruction during which the interrupt
The MC68030 also services interrupts if it reads the not ready format word
from the save CIR during a cpSAVE instruction. The MC68030 uses the normal
four word pre-instruction stack frame when it services interrupts after reading
the not ready format word. Thus, the processor can service any pending
cuting a cpSAVE or cpRESTORE instruction if the length field of a valid format
word is not a multiple of four bytes in length. If the MC68030 reads a format
word with an invalid length field from the save CIR during the cpSAVE in-
struction, it aborts the coprocessor instruction by writing an abort mask (refer
to 10.3.2 Control CIR) to the control CIR and initiates format error exception
from the effective address specified in the cpRESTORE instruction, the
to the control CIR and initiates format error exception processing.
The MC68030 uses the four-word pre-instruction stack frame and the format
Thus, if the exception handler does not modify the stack frame, the main
during the execution of a general or conditional category instruction under
either of two conditions. If the main processor reads a null primitive with
C A = I and I A = I , it services any pending interrupts prior to reading the
struction execution and the main processor reads a null primitive with CA=0,
services pending interrupts prior to reading the response CIR again.
interrupts during the execution of a general or conditional category copro-
cessor instruction. Since it uses this stack frame, the main processor can
perform all necessary processing and then return to read the response CIR.
exception was taken.
interrupts and execute an RTE to return and re-initiate the cpSAVE instruction
by reading the save CIR.
processing. If the MC68030 reads a format word with an invalid length field
MC68030 writes that format word to the restore CIR and then reads the
coprocessor response from the restore CIR. The MC68030 then aborts the
cpRESTORE instruction by writing an abort mask (refer to 10.3.2 Control CIR)
error vector number 14 when it initiates format error exception processing.
processor attempts to restart the instruction during which the exception oc-
curred after it executes an RTE to return from the handler.
response CIR. Similarly, if a trace exception is pending during cpGEN in-
IA= 1, and PF=0 (refer to 10.5.2.5 TRACE EXCEPTIONS), the main processor
Interrupt processing, discussed in 8.1.9 Interrupt Excep-
MC68030 USER'S MANUAL
The MC68030 can detect a format error while exe-
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