Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK データシート

447

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

The reset value is 2 cycles.

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:

This field is found only in DDR2-SDRAM devices.

Reset value is 0. This field name may be described as “DS” in some memory datasheets and defines the output drive strength. 
This value is used during the power-up sequence.

Note:

This field is found only in DDR2-SDRAM devices.

Reset value is 0.

0: Enable DLL

1: Disable DLL

Note:

This field is found only in DDR2-SDRAM devices.

Reset value is 7.

Note:

SDRAM Controller supports only 2 values for OCD (default calibration and exit from calibration). These values MUST 
be always programmed during the initialization sequence. The calibration default must be first programmed then exit 
calibration and maintain settings must be programmed.

Note:

This field is found only in DDR2-SDRAM devices.

0

Reserved

Reserved

1

Reserved

Reserved

2

Reserved

2

3

3

3

4

Reserved

Reserved

5

Reserved

Reserved

6

Reserved

Reserved

7

Reserved

Reserved

0

DDR1_2_NORMALSTRENGTH

Normal driver strength

1

DDR1_2_WEAKSTRENGTH

Weak driver strength

0

DDR2_EXITCALIB

Exit from OCD calibration mode exit and maintain settings

7

DDR2_DEFAULT_CALIB

OCD calibration default