266
Table 10.9
8-Bit External Device/Big-Endian Access and Data Alignment
Data Bus
Strobe Signals
Operation
D31–
D24
D23–
D16
D15–
D8
D7–D0
WE3
,
DQMUU
WE2
,
DQMUL
WE1
,
DQMLU
WE0
,
DQMLL
Byte access at 0
—
—
—
Data 7–0
Asserted
Byte access at 1
—
—
—
Data 7–0
Asserted
Byte access at 2
—
—
—
Data 7–0
Asserted
Byte access at 3
—
—
—
Data 7–0
Asserted
Word
access at 0
1st time
at 0
—
—
—
Data
15–8
Asserted
2nd time
at 1
—
—
—
Data
7–0
Asserted
Word
access at 2
1st time
at 2
—
—
—
Data
15–8
Asserted
2nd time
at 3
—
—
—
Data
7–0
Asserted
Longword
access at 0
1st time
at 0
—
—
—
Data
31–24
Asserted
2nd time
at 1
—
—
—
Data
23–16
Asserted
3rd time
at 2
—
—
—
Data
15–8
Asserted
4th time
at 3
—
—
—
Data
7–0
Asserted
Содержание SH7709S
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Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
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