MC68030RC20C Freescale Semiconductor, MC68030RC20C Datasheet - Page 514

• 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

M O T O R O L A
11.6.18 Save and Restore Operations
11.7 Address Translation Tree Search Timing
The save and restore operation table indicates the number of clock periods
from exception, with complete execution times and stack length given. No
these operations. For instruction-cache case and for no-cache case, the total
All timing data ssumes two-clock reads and writes.
The time required for a search of the address translation tree depends on
the configuration of the tree structure and the descriptors in the tree, the
time, and other factors. The large number of variables involved implies that
suitable for use with sh(1) on either UNIX ~ System V or BSD 4.2. To use the
carriage returns are entered.
The shell script assumesthat the data bus between the MC68030 and memory
needed for the processor to perform the specified state save or to return
additional tables are needed to calculate total effective execution time for
prefetch, and write cycles is given inside the parentheses as (r/p/w). The read,
prefetch, and write cycles are included in the total clock cycle number.
states of the used (U) and modified (M) bits in the descriptors, bus cycle
search time can best be calculated by a program. To determine the time
required for the MC68030 to perform the table search for a specific config-
uration, the following interactive program can be used. It is a shell script
program, run the script and answer the questions about the system config-
uration and current state. The values shown in square brackets at the ends
of the question lines are the default values that the program uses when
is 32 bits wide. To calculate the search time for a narrower bus, enter the
appropriate multiple of the bus cycle time in response to the bus cycle time
UN)X is a registered trademark of AT&T Bell Laboratories.
number of clock cycles is outside the parentheses. The number of read,
Bus Cycle Fault (Short)
Bus Cycle Fault (Long)
RTE (Normal Four Word)
RTE (Six Word)
RTE (Throwaway)
RTE (Coprocessor)
RTE (Short Fault)
RTE (Long Fault)
Operation
MC68030 USER'S M A N U A L
Head
0
0
1
1
1
1
1
1
Tail
0
0
0
0
0
0
0
0
I-Cache Case No-Cache Case
36(1/0/10)
62(1/0/24)
26(7/0/0)
36(10/0/0)
76(25/0/0)
18(4/0/0)
18(4/0/0)
12(4/0/0)
38(1/2/10)
64(1/2/24)
20(4/2/0)
26(10/2/0)
76(25/2/0)
20(4/2/0)
12(4/0/0)
26(7/2/0)
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