Rainbow Electronics W90N745CDG User Manual
Page 38
W90N745CD/W90N745CDG
Publication Release Date: September 22, 2006
-
33
-
Revision
A2
Table 6.2.7 Byte access write operation with Big Endian
ACCESS OPERATION
WRITE OPERATION (CPU REGISTER EXTERNAL MEMORY)
XD WIDTH
HALF WORD
BYTE
Bit Number
CPU Reg Data
31 0
ABCD
31 0
ABCD
SA
BAL BAU
BA
Bit Number
SD
31 0
D D D D
31 0
D D D D
31 0
D D D D
Bit Number
ED
15 8
D
7 0
D
7 0
D
XA
BAL BAL
BA
nWBE [1-0] /
SDQM [1-0]
AU UA
XA
Bit Number
XD
15 0
D X
15 0
X D
7 0
D
Bit Number
Ext. Mem Data
15 8
D
7 0
D
7 0
D
Timing Sequence
Table 6.2.8 Byte access read operation with Big Endian
ACCESS OPERATION
READ OPERATION (CPU REGISTER Í EXTERNAL MEMORY)
XD WIDTH
HALF WORD
BYTE
Bit Number
CPU Reg Data
7 0
C
7 0
D
7 0
D
SA
BAL BAU
BA
Bit Number
SD
7 0
C
7 0
D
7 0
D
Bit Number
ED
7 0
C
15 8
D
7 0
D
XA
BAL BAL
BA
SDQM [1-0]
AU UA
XA
Bit Number
XD
15 0
CD
15 0
CD
7 0
D
Bit Number
Ext. Mem Data
15 0
CD
7 0
D
Timing Sequence