Datasheet

460
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
• DLL: Reset DLL
Reset value is 0.
This field defines the value of Reset DLL.
0 = Disable DLL reset.
1 = Enable DLL reset.
This value is used during the power-up sequence.
Note: Note: This field is found only in DDR2-SDRAM devices.
• DIC/DS: Output Driver Impedance Control
Reset value is 0.
This field defines the output drive strength.
0 = Normal driver strength.
1 = Weak driver strength.
This value is used during the power-up sequence. This parameter is found in the datasheet as DIC or DS.
Note: Note: This field is found only in DDR2-SDRAM devices.
• DIS_DLL: Disable DLL
Reset value is 0.
0 = Enable DLL
1 = Disable DLL
Note: Note: This field is found only in DDR2-SDRAM devices.
• OCD: Off-chip Driver
Reset value is 7.
Notes: 1. OCD is NOT supported by the controller, but these values MUST be programmed during the initialization sequence.
2. This field is found only in DDR2-SDRAM devices.
• EBISHARE: External Bus Interface is Shared
The DDR controller embedded in the EBI is used at the same time as another memory controller (SMC,..)
Reset value is 0.
0 = Only the DDR controller function is used.
1 = The DDR controller shares the EBI with another memory controller (SMC, NAND,..)
011 33
100 Reserved Reserved
101 Reserved Reserved
110 Reserved Reserved
111 Reserved Reserved
OCD Use
000 OCD calibration mode exit, maintain setting
111 OCD calibration default
CAS DDR2 CAS Latency SDR CAS Latency