EMIF
7.3.6.11 DDR PHY Data Macro 0/1 Write Data Slave Ratio Register
(DATA0/1_REG_PHY_WR_DATA_SLAVE_RATIO_0)
The DDR PHY Data Macro 0/1 Write Data Slave Ratio Register
(DATA0/1_REG_PHY_WR_DATA_SLAVE_RATIO_0) is shown in the figure and table below.
Figure 7-138. DDR PHY Data Macro 0/1 Write Data Slave Ratio Register
(DATA0/1_REG_PHY_WR_DATA_SLAVE_RATIO_0)
31
20
19
16
Reserved
Reserved
R-40h
R-0h
15
10
9
0
Reserved
WR_DATA_SLAVE_RATIO_CS0
R-0h
W-40h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 7-161. DDR PHY Data Macro 0/1 Write Data Slave Ratio Register
(DATA0/1_REG_PHY_WR_DATA_SLAVE_RATIO_0) Field Descriptions
Bit
Field
Value
Description
31-20
Reserved
40h
Reserved
19-10
Reserved
0
9-0
WR_DATA_SLAVE_RATIO_CS0
40h
Ratio value for write data slave DLL for CS0.
This is the fraction of a clock cycle represented by the shift to be applied to
the write DQ muxes 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.
474
Memory Subsystem
SPRUH73H – October 2011 – Revised April 2013
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