Motorola MCF5281 用户手册
13-14
MCF5282 User’s Manual
MOTOROLA
Misaligned Operands
Figure 13-17. Line Write Burst (3-2-2-2) with One Wait State
Figure 13-18 shows a burst-inhibited line write. The external device executes a basic write
cycle while determining that a line is being transferred. The external device uses fast
termination to end each subsequent transfer.
cycle while determining that a line is being transferred. The external device uses fast
termination to end each subsequent transfer.
Figure 13-18. Line Write Burst-Inhibited
13.5 Misaligned Operands
Because operands can reside at any byte boundary, unlike opcodes, they are allowed to be
misaligned. A byte operand is properly aligned at any address, a word operand is
misaligned. A byte operand is properly aligned at any address, a word operand is
A[31:0]
R/W, TIP
TS
CSn, OE, BSn
D[31:0]
TA
Write
Write
Write
Write
S0 S1 S2 S3
S4 S5
S10
S9
S8
S7
S6
S11
WS
WS
WS
WS
CLKOUT
SIZ[1:0]
A[31:0]
R/W, TIP
SIZ[1:0]
TS
D[31:0]
TA
Line
Longword
Basic
Fast Fast
Fast
A[3:2] = 00
A[3:2] = 01
A[3:2] = 10
A[3:2] = 11
Write
Write
Write
Write
S0 S1
S2 S3 S4 S5 S0 S1 S4 S5 S0 S1 S4 S5 S0 S1 S4 S5
CLKOUT
CSn
OE, BSn