W90N745CD Datasheet, PDF (38/422 Pages) Winbond – 16/32-bit ARM microcontroller

W90N745CD/W90N745CDG
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
Bit Number
ED
31 0
DDDD
15 8
D
31 0
DDDD
70
D
31 0
DDDD
70
D
XA
BAL
BAL
BA
nWBE [1-0] /
SDQM [1-0]
AU
UA
XA
Bit Number
15 0
15 0
70
XD
DX
XD
D
Bit Number
15 8
70
70
Ext. Mem Data
D
D
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
Bit Number
CPU Reg Data
HALF WORD
70
70
C
D
BYTE
70
D
SA
BAL
BAU
BA
Bit Number
70
70
70
SD
C
D
D
Bit Number
70
15 8
70
ED
C
D
D
XA
BAL
BAL
BA
SDQM [1-0]
AU
UA
XA
Bit Number
15 0
15 0
70
XD
CD
CD
D
Bit Number
15 0
70
Ext. Mem Data
CD
D
Timing Sequence
Publication Release Date: September 22, 2006
- 33 -
Revision A2