MC68LC060ZU66 Freescale Semiconductor, MC68LC060ZU66 Datasheet - Page 166
MC68LC060ZU66
Manufacturer Part Number
MC68LC060ZU66
Description
IC MPU 32BIT 68K 66MHZ 304-TBGA
Manufacturer
Freescale Semiconductor
Specifications of MC68LC060ZU66
Processor Type
M680x0 32-Bit
Speed
66MHz
Voltage
3.3V
Mounting Type
Surface Mount
Package / Case
304-TBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
-
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The combination of operand size and alignment determines the number of bus cycles
required to perform a particular memory access. Table 7-3 lists the number of bus cycles
required for different operand sizes with all possible alignment conditions for read and write
cycles. The table confirms that alignment significantly affects bus cycle throughput for non-
cachable accesses. For example, in Figure 7-9 the misaligned long-word operand took three
bus cycles because the byte offset = $1. If the byte offset = $0, then it would have taken one
MOTOROLA
MISCELLANEOUS
ATTRIBUTES
Figure 7-11. Misaligned Long-Word Read Bus Cycle Timing
SIZ1–SIZ0
D31–D24
D23–D16
D15–D8
A31–A2
A1–A0
D7–D0
BCLK
R/W
BS0
BS1
BS2
BS3
TIP
TA
TS
C1
READ
BYTE
BYTE
C2
1
M68060 USER’S MANUAL
BYTE 0
C1
WORD
READ
WORD
C2
2
BYTE 1
BYTE 2
C1
READ
BYTE
BYTE
C2
0
BYTE 3
Bus Operation
7-11
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