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Table J-2. Instruction Timing Examples for Different Buses
Note: L = L-bus, U = U-bus, E = E-bus, C = CMF (Flash), IMB = internal memory bus, DC = DECRAM
Access
1
Load/Store -> Ebus
L
Load/Store -> IMB
L
16 bits
Instruction Fetch->
C,U
cmf
new page
3 consecutive
accesses
Instruction Fetch->
U
DECRAM
(Decompression off)
Instruction Fetch->
C,U
cmf
new page
Load/Store -> IMB
L
Instruction Fetch->
cmf
new page
Load/Store -> IMB
L
External Bus-> cmf
E
new page
External Bus-> IMB
E
J-2
2
3
4
5
U
E
E
U
U
IMB
IMB
U
2
U
C,U
U
C,U
U
ICDU
ICDU
U
U
U
IMB
IMB
U
C
U
U
IMB
IMB
U
U
U
E
U
IMB
IMB
MPC533 Reference Manual
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Number of Clocks
6
7
8
9
L
L
L
U
L
U
E
10
11
12
13
MOTOROLA
Total
1
6
6
2
1
1
2
6
6
6
5
7
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