W90P710_05 Datasheet, PDF (43/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
Table7.2.7 Byte access write operation with Big Endian
ACCESS
OPERATION
WRITE OPERATION (CPU REGISTER Î EXTERNAL MEMORY)
XD WIDTH
WORD
HALF WORD
BYTE
Bit Number
CPU Reg Data
31 0
ABCD
31 0
ABCD
31 0
ABCD
SA
BA0
BA1
BA2
BA3
BAL
BAU
BA
Bit Number
SD
Bit Number
ED
31 0
DDDD
31 24
D
31 0
DDDD
23 16
D
31 0
DDDD
15 8
D
31 0
DDDD
70
D
31 0
DDDD
15 8
D
31 0
DDDD
70
D
31 0
DDDD
70
D
XA
BA0
BA0
BA0
BA0
BAL
BAL
BA
nWBE [3-0] /
SDQM [3-0]
Bit Number
XD
Bit Number
Ext. Mem Data
Timing Sequence
AUUU
31 0
DXXX
31 24
D
UAUU
31 0
XDXX
23 16
D
UUAU
31 0
XXDX
15 8
D
UUUA
31 0
XXXD
70
D
XXAU
15 0
DX
15 8
D
XXUA
15 0
XD
70
D
XXXA
70
D
70
D
ACCESS
OPERATION
XD WIDTH
Bit Number
CPU Reg Data
SA
Bit Number
SD
Bit Number
ED
XA
Table7.2.8 Byte access read operation with Big Endian
READ OPERATION (CPU REGISTER Í EXTERNAL MEMORY)
WORD
HALF WORD
BYTE
70
70
70
70
70
70
70
A
B
C
D
C
D
D
BA0
BA1
BA2
BA3
BAL
BAU
BA
70
70
70
70
70
70
70
A
B
C
D
C
D
D
70
15 8
23 16
31 24
70
15 8
70
A
B
C
D
C
D
D
BA0
BA0
BA0
BA0
BAL
BAL
BA
SDQM [3-0]
Bit Number
XD
Bit Number
Ext. Mem Data
Timing Sequence
AUUU
31 0
ABCD
UAUU
UUAU
31 0
ABCD
31 0
ABCD
31 0
ABCD
UUUA
31 0
ABCD
XXAU
XXUA
15 0
CD
15 0
CD
15 0
CD
XXXA
70
D
70
D
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Publication Release Date: January 17, 2005
Revision A.2