Renesas SH7709S Manual Do Utilizador

Renesas

Rev. 5.00, 09/03, page 264 of 760

Table 10.12 8-Bit External Device/Little-Endian Access and Data Alignment

Data Bus

Strobe Signals

Operation

D31–
D24

D23–
D16

D15–D8

D7–D0

W

W

W

WE

EE

E3333

,

DQMUU

W

W

W

WE

EE

E2222

,

DQMUL

W

W

W

WE

EE

E1111

,

DQMLU

W

W

W

WE

EE

E0000

,

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
7–0

Asserted

2nd time
at 1

—

—

—

Data
15–8

Asserted

Word access
at 2

1st time
at 2

—

—

—

Data
7–0

Asserted

2nd time
at 3

—

—

—

Data
15–8

Asserted

Longword
access at 0

1st time
at 0

—

—

—

Data
7–0

Asserted

2nd time
at 1

—

—

—

Data
15–8

Asserted

3rd time
at 2

—

—

—

Data
23–16

Asserted

4th time
at 3

—

—

—

Data
31–24

Asserted