EMIF
7.3.5.32 RDWR_LVL_CTRL Register (offset = DCh) [reset = 0h]
Read-Write Leveling Control Register
Read-Write Leveling Control Register is shown in
and described in
Read-Write Leveling Control Register
Figure 7-122. Read-Write Leveling Control Register
31
30
29
28
27
26
25
24
REG_RDWRLVLFULL
REG_RDWRLVLINC_PRE
_START
R/W-
23
22
21
20
19
18
17
16
REG_RDLVLINC_INT
R/W-
15
14
13
12
11
10
9
8
REG_RDLVLGATEINC_INT
R/W-
7
6
5
4
3
2
1
0
REG_WRLVLINC_INT
R/W-
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 7-142. Read-Write Leveling Control Register Field Descriptions
Bit
Field
Type
Reset
Description
31
REG_RDWRLVLFULL_S
R/W
Full leveling trigger.
TART
Writing a 1 to this field triggers full read and write leveling.
This bit will self-clear to 0.
30-24
REG_RDWRLVLINC_PR
Incremental leveling pre-scalar in number of refresh periods.
E
The value programmed is minus one the required value.
Refresh period is defined by reg_refresh_rate in SDRAM Refresh
Control register.
23-16
REG_RDLVLINC_INT
R/W
Incremental read data eye training interval.
Number of reg_rdwrlvlinc_pre intervals between incremental read
data eye training.
A value of 0 will disable incremental read data eye training.
15-8
REG_RDLVLGATEINC_I
R/W
Incremental read DQS gate training interval.
NT
Number of reg_rdwrlvlinc_pre intervals between incremental read
DQS gate training.
A value of 0 will disable incremental read DQS gate training.
7-0
REG_WRLVLINC_INT
R/W
Incremental write leveling interval.
Number of reg_rdwrlvlinc_pre intervals between incremental write
leveling.
A value of 0 will disable incremental write leveling.
457
SPRUH73H – October 2011 – Revised April 2013
Memory Subsystem
Copyright © 2011–2013, Texas Instruments Incorporated