NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 241 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
[12:8]
DQS1_ODS DQS1 Output Delay Selection
This field controls the DQS1 output delay value and source selection circuit for DQS1 output generation.
The brief circuit for this function is listed below.
DQS1_ODS
DQS1 Output
5’b0_0000
The DQS1 is generated from DRAM_CLK.
5’b0_0001
~
5’b0_1111
The DQS1 is generated from DRAM_CLK with a delay value. This delay value is
controlled by the following equation:
DQS1 delay = DQS1_ODS[11:8] * DelayCLKMUX.
DelayCLKMUX:
It’s the gate delay of a CLKMUX gate.
5’b1_0000
The DQS1 is generated from DDR_CLK/2.
5’b1_0001
~
5’b1_1111
The DQS1 is generated from DDR_CLK/2 with a delay value. This delay value is
controlled by the following equation:
DQS1 delay = DQS1_ODS[11:8] * DelayCLKMUX.
DelayCLKMUX: It’s the gate delay of a CLKMUX gate.
[7:5]
Reserved
Reserved.
[4:0]
DQS0_ODS DQS0 Output Delay Selection
This field controls the DQS0 output delay value and source selection circuit for DQS0 output generation.
The brief circuit for this function is listed below.
DQS0_ODS
DQS0 Output
5’b0_0000
The DQS0 is generated from DRAM_CLK.
5’b0_0001
~
5’b0_1111
The DQS0 is generated from DRAM_CLK with a delay value. This delay value
is controlled by the following equation:
DQS1 delay = DQS0_ODS[3:0] * DelayCLKMUX.
DelayCLKMUX: It’s the gate delay of a CLKMUX gate.
5’b1_0000
The DQS0 is generated from DDR_CLK/2.
5’b1_0001
~
5’b1_1111
The DQS1 is generated from DDR_CLK/2 with a delay value. This delay value
is controlled by the following equation:
DQS1 delay = DQS0_ODS[3:0] * DelayCLKMUX.
DelayCLKMUX: It’s the gate delay of a CLKMUX gate.