W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 25

• Manufacturer Part Number: W90N740CD
• Description: 32-Bit ARM7TDMI-Based Micro-Controller
• Manufacturer: WINBOND [Winbond]

Table 6.2.7 and Table 6.2.8
Using big-endian and byte access, Program/Data path between register and external memory.
BA = Address whose LSB is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F
BAL = Address whose LSB is 0, 2, 4, 6, 8, A, C, E
F
BA0 = Address whose LSB is 0, 4, 8, C BA1 = Address whose LSB is 1, 5, 9, D
BA2 = Address whose LSB is 2, 6, A, E BA3 = Address whose LSB is 3, 7, B, F
Timing Sequence
Ext. Mem Data
CPU Reg Data
OPERATION
nWBE [3-0] /
Bit Number
Bit Number
Bit Number
SDQM [3-0]
Bit Number
Bit Number
XD WIDTH
ACCESS
SA
SD
ED
XA
XD
D D D D
D X X X
31
31
31 24
AUUU
31 24
Table6.2.7 Byte access write operation with Big Endian
BA0
BA0
D
D
0
0
WRITE OPERATION (CPU REGISTER
D D D D
X D X X
31
31
23 16
UAUU
23 16
BA1
BA0
D
D
WORD
0
0
31
ABCD
0
D D D D
X X D X
31
31
UUAU
15 8
15 8
BA2
BA0
D
D
- 22 -
0
0
W90N740CD/W90N740CDG
BAU = Address whose LSB is 1, 3, 5, 7, 9, B, D,
D D D D
X X X D
31
31
UUUA
BA3
7 0
BA0
7 0
D
D
0
0
D D D D
31
EXTERNAL MEMORY)
XXAU
15 8
15 0
15 8
BAL
BAL
D X
D
D
HALF WORD
0
31
ABCD
0
D D D D
31
XXUA
15 0
BAU
7 0
BAL
7 0
X D
D
D
0
D D D D
31
BYTE
31
ABCD
XXXA
7 0
7 0
7 0
BA
BA
D
D
D
0
0