EMIF
7.3.6.3
DDR PHY Command 0/1/2 Invert Clockout Selection Register(
CMD0/1/2_REG_PHY_INVERT_CLKOUT_0)
The CDDR PHY Command 0/1/2 Invert Clockout Selection Register(
CMD0/1/2_REG_PHY_INVERT_CLKOUT_0) is shown in the figure and table below.
Figure 7-131. DDR PHY Command 0/1/2 Invert Clockout Selection Register(
CMD0/1/2_REG_PHY_INVERT_CLKOUT_0)
31
16
Reserved
R-0
15
1
0
Reserved
INVERT_CLK_SEL
R-0
W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 7-152. DDR PHY Command 0/1/2 Invert Clockout Selection Register(
CMD0/1/2_REG_PHY_INVERT_CLKOUT_0) Field Descriptions
Bit
Field
Value
Description
31-1
Reserved
0
Reserved
0
INVERT_CLK_SE
Inverts the polarity of DRAM clock.
L
0
Core clock is passed on to DRAM
1
inverted core clock is passed on to DRAM
7.3.6.4
DDR PHY Data Macro 0/1 Read DQS Slave Ratio Register
(DATA0/1_REG_PHY_RD_DQS_SLAVE_RATIO_0)
The DDR PHY Data Macro 0/1 Read DQS Slave Ratio
Register(DATA0/1_REG_PHY_RD_DQS_SLAVE_RATIO_0) is shown in the figure and table below.
Figure 7-132. DDR PHY Data Macro 0/1 Read DQS Slave Ratio Register
(DATA0/1_REG_PHY_RD_DQS_SLAVE_RATIO_0))
31
i
19
16
Reserved
Reserved
R-0h
R-0h
15
10
9
0
Reserved
RD_DQS_SLAVE_RATIO_CS0
R-0h
W-40h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 7-153. DDR PHY Data Macro 0/1 Read DQS Slave Ratio Register
(DATA0/1_REG_PHY_RD_DQS_SLAVE_RATIO_0) Field Descriptions
Bit
Field
Value
Description
31-20
Reserved
Reserved
19-10
Reserved
0h
Reserved
9-0
RD_DQS_SLAVE
Ratio value for Read DQS slave DLL for CS0.
_RATIO_CS0
40h
This is the fraction of a clock cycle represented by the shift to be applied to the read DQS in units of
256ths. In other words, the full-cycle tap value from the master DLL will be scaled by this number
over 256 to get the delay value for the slave delay line.
470
Memory Subsystem
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated