Datasheet

389
SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
23.8.1.2 Software Configuration (1 x 16-bit SDR-SDRAM)
The following configuration must be respected:
 Address lines A[2..11], A[13-14], BA0, BA1, SDA10, SDCS, SDWE, SDCKE, NBS1, RAS, CAS, and data
lines D[0..15] are multiplexed with PIO lines and thus dedicated PIOs must be programmed in peripheral
mode in the PIO controller.
 Initialize the SDRAM Controller depending on the SDRAM device and system bus frequency.
The SDRAM initialization sequence is described in Section 24.5.1 “SDRAM Device Initialization”.
Figure 23-3. 1 x 16-bit SDR-SDRAM Hardware Configuration
SDRAM
Controller
D0-D15 D0-D15
RAS
CAS
SDCK
SDCKE
SDWE
NBS0
16M x 16
A0-A9
RAS
CAS
CLK
CKE
WE
DQMH
DQML
CS
NBS1
SDCS
BA0
BA1
BA0
BA1
A10
A11
A13
A12
A14
SDA10
A13
A14
SDA10
A[2-11 ]
A[2-11]