Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
423
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
Figure 31-2. Single Write Access, Row Closed, Low-power DDR1-SDRAM Device
Figure 31-3. Single Write Access, Row Closed, DDR2-SDRAM Device
SDCLK
A[12:0]
COMMAND
BA[1:0]
0
Row a
col a
NOP
PRCHG
NOP
ACT
NOP
WRITE
NOP
0
DM[1:0]
0
3
Trp = 2
Trcd = 2
DQS[1:0]
D[15:0]
Db
Da
3
SDCLK
A[12:0]
COMMAND
BA[1:0]
0
Row a
col a
NOP
PRCHG
NOP
ACT
NOP
WRITE
NOP
0
DM[1:0]
0
3
Trp = 2
Trcd = 2
DQS[1:0]
D[15:0]
Db
Da
3