W90N745CD Datasheet, PDF (37/422 Pages) Winbond – 16/32-bit ARM microcontroller

W90N745CD/W90N745CDG
Table 6.2.6 Half-word 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
15 0
CD
15 0
DC
SA
HA
HA
Bit Number
SD
Bit Number
ED
15 0
CD
15 0
CD
15 0
DX
15 0
DC
15 0
DC
XA
HA
HA
HA+1
SDQM [1-0]
Bit Number
XD
Bit Number
Ext. Mem Data
Timing Sequence
AA
15 0
CD
15 0
CD
XA
70
D
70
D
1st read
XA
70
C
70
C
2nd read
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 BAU = Address whose LSB is 1,3,5,7,9,B,D,F
- 32 -