Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
424
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
Figure 31-4. Single Write Access, Row Closed, SDR-SDRAM Device
Figure 31-5. Burst Write Access, Row Closed, Low-power DDR1-SDRAM Device
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
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]