MC68030RC33C Freescale Semiconductor, MC68030RC33C Datasheet - Page 473

• 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: -

11
11-10
INSTRUCTION
CONTROLLER
SEQUENCER
EXECUTION
ACTIVITY
COUNT
TIME
8US
BUS
CLK
CLK
Comparing the two alignments, the execution time of the MOVE instruction
of nine clocks. Referring to the table in 11.6.6 MOVE Instruction and the table
which has an average no-cache-case time of seven clocks.
The average no-cache-case timing rather than the maximum no-cache-case
timing gives a closer approximation of the actual timing of an instruction
stream in many cases. The total execution time of the two instructions in the
Figure 11-5 shows processor activity for odd alignment. The instruction stream
is positioned in 32-bit memory as:
is eight clocks for even alignment and 10 clocks for odd alignment, an average
in 11.6.1 Fetch Effective Address (fea), the average no-cache-case time is
2 + 7 = 9 clocks. A similar calculation can be made of the CMPI instruction,
previous example is 16 clocks for both even and odd alignment. Adding the
A d d r e s s
1
2
n + 1 2
n
n + 4
n + 8
Figure 11-5. Processor Activity - - Odd Alignment
3
4
MC68030 USER'S MANUAL
LEGEND:
5
MOVE.L (d16,An.Dn),Dn
#(data).W,(d16,An}
EA Ext
CMPI
6
d16
• . .
7
8
F - q
# ( d a t a . W )
10
M OV E
d16
9
• • •
11
PREFETCH
CALCULATE AND FETCH
n + 12
12
CMPI.W #(data).W,(d16,An)
SOURCE EA
FOR CMPI
13
READ FROM
(d16,An)
14
MOTOROLA
15
PREFETCH
PERFORM
n + 16
CMPI
16