Datasheet

SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
236
Figure 21-4. Single Write Access, Row Closed, SDR-SDRAM Device
Figure 21-5. Burst Write Access, Row Closed, Low-power DDR1-SDRAM Device
Row a Col a
3
0
3
NOP PRCHG NOP ACT NOP WRITE NOPBST
SDCLK
A[12:0]
COMMAND
BA[1:0]
0 0
DM[1:0]
Trp = 2
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]