Atmel AVR XMEGA AU series

479
8331B–AVR–03/12
Atmel AVR XMEGA AU
36.12 SDRAM 8-bit Write
Figure 36-36. Single write
Precharge All Banks
Bank Adr 0x0
D[7:0]
Row Adr Col Adr 0x400
Active
Write
NOP* NOP**
Single write
* The number of NOPs is equal to ROWCOLDLY[2:0] (ROWCOLDLY = 1 is shown)
** The number of NOPs is equal to WRDLY[1:0] + 1 (WRDLY = 0 is shown)
*** The number of NOPs is equal to RPDLY[1:0] (RPDLY = 1 is shown)
CLK
CKE
CAS
RAS
DQM
BA[1:0]
A[11:0]
D
Clk
PER2
WE
CS