Manual

218
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
Figure 23-3. Single Write Access, Row Closed, SDR-SDRAM Device
Figure 23-4. Burst Write Access, Row Closed, DDR-SDRAM Devices
Row a Col a
3
0
3
NOP PRCHG NOP ACT NOP WRITE NOP
BST
SDCLK
A[12:0]
COMMAND
BA[1:0]
0 0
DM[1:0]
Trp=2
SDCLKN
D[31:0]
DaDb
Trcd=2
Trp=2
Trcd=2
SDCLK
Row a
col a
A[12:0]
NOP PRCHG NOP ACT NOP WRITE NOP
COMMAND
0
BA[1:0]
DQS[1:0]
Da Db Dc Dd De Df Dg Dh
D [15:0]
3 0 3
DM[1:0]