MC68030RC40C Freescale Semiconductor, MC68030RC40C Datasheet - Page 409

• Manufacturer Part Number: MC68030RC40C
• Description: IC MPU 32BIT ENHANCED 128-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68030RC40C

• Processor Type: M680x0 32-Bit
• Speed: 40MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 128-PGA
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 40MHz
• 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

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10.2.3.2 COPROCESSOR FORMAT WORDS.
10.2.3.2.1 Empty/Reset Format Word.
10-22
The upper byte of the coprocessor format word contains the code used to
format word specifies the size in bytes (which must be a multiple of four) of
the coprocessor state frame. This value is only relevant when the code byte
format code during a cpSAVE instruction to indicate that the coprocessor
format code or the previous hardware reset. If the main processor reads the
tus information to the main processor during the execution of cpSAVE and
cpRESTORE instructions using coprocessor format words. The format words
defined for the M68000 coprocessor interface are listed in Table 10-2.
communicate coprocessor status information to the main processor. The
MC68030 recognizes four types of format words: empty/reset, not ready,
invalid format, and valid format. The MC68030 interprets the reserved format
codes ($03-$0F) as invalid format words. The lower byte of the coprocessor
contains the valid format code (refer to 10.2.3.2.4 Valid Format Word).
contains no user-specific information. That is, no coprocessor instructions
empty/reset format word from the save CIR during the initiation of a cpSAVE
cpSAVE instruction and executes the next instruction.
When the main processor reads the empty/reset format word from memory
during the execution of the cpRESTORE instruction, it writes the format word
to the restore CIR. The main processor then reads the restore CIR and, if the
coprocessor returns the empty/reset format word, executes the next instruc-
tion. The main processor can initialize the coprocessor by writing the empty/
the main processor to initiate the next coprocessor instruction. In particular,
after the cpRESTORE of the empty/reset format word, the execution of a
have been executed since either a previous cpRESTORE of an empty/reset
instruction, it stores the format word at the effective address specified in the
reset format code to the restore CIR. When the coprocessor receives the
empty/reset format code, it terminates any current operations and waits for
Format Code
Table 10-2. Coprocessor Format Word Encodings
03-OF
IO-FF
O0
01
02
MC68030 USER'S MANUAL
Length
Length
xx
xx
xx
xx
The coprocessor returns the empty/reset
Valid Format, Coprocessor Defined
Empty/Reset
Not Ready, Come Again
Invalid Format
Undefined, Reserved
The coprocessor communicates sta-
Meaning
MOTOROLA