Datasheet

SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
246
Figure 21-20. Self Refresh and Automatic Update
Figure 21-21. Automatic Update During AUTO-REFRESH Command and SDRAM Access
NOP NOPPRCHG
MRS ARFSHNOP
0
Tmrd
Enter Self Refresh
Mode
SDCLK
A[12:0]
COMMAND
CKE
BA[1:0]
2
NOP
Update Extended Mode
register
Trp
Pasr-Tcr-Ds
NOP NOPPRCHALL MRSARFSH
NOP
0
Trfc
SDCLK
A[12:0]
COMMAND
CKE
BA[1:0]
2
NOP
Update Extended mode
register
Trp
Pasr-Tcr-Ds
ACT
0
Tmrd