CONTROL_MODULE Registers
9.3.5 control_emif_sdram_config Register (offset = 110h) [reset = 0h]
The CONTROL_EMIF_SDRAM_CONFIG register exports SDRAM configuration information to the EMIF
after resuming from low power scenarios.
This register should be loaded with the same value as SDRAM_CONFIG during DDR initialization.
control_emif_sdram_config is shown in
and described in
.
Figure 9-8. control_emif_sdram_config Register
31
30
29
28
27
26
25
24
SDRAM_TYPE
IBANK_POS
DDR_TERM
R/W-0h
R/W-0h
R/W-0h
23
22
21
20
19
18
17
16
Reserved
DYN_ODT
Reserved
SDRAM_DRIVE
CWL
R-0h
R/W-0h
R-0h
R/W-0h
R/W-0h
15
14
13
12
11
10
9
8
NARROW_MODE
CL
ROWSIZE
R/W-0h
R/W-0h
R/W-0h
7
6
5
4
3
2
1
0
ROWSIZE
IBANK
EBANK
PAGESIZE
R/W-0h
R/W-0h
R/W-0h
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 9-15. control_emif_sdram_config Register Field Descriptions
Bit
Field
Type
Reset
Description
31-29
SDRAM_TYPE
R/W
0h
SDRAM Type selection
000 – Reserved
001 – LPDDR1
010 – DDR2
011 – DDR3
100 – Reserved
101 – Reserved
110 – Reserved
111 – Reserved
28-27
IBANK_POS
R/W
0h
Internal bank position.
00 - All Bank Address bits assigned from OCP address above
column address bits.
01 – Bank Address bits [1:0] assigned from OCP address above
column address bits and bit [2] from OCP address bits above row
address bits.
10 – Bank Address bit [0] assigned from OCP address above
column address bits and bit [2:1] from OCP address bits above row
address bits.
11 – All Bank Address bits assigned from OCP address bits above
row address bits.
26-24
DDR_TERM
R/W
0h
DDR2 and DDR3 termination resistor value. Set to 0 to disable
termination.
For DDR2, set to 1 for 75 ohm, set to 2 for 150 ohm, and set to 3 for
50 ohm.
For DDR3, set to 1 for RZQ/4, set to 2 for RZQ/2, set to 3 for RZQ/6,
set to 4 for RZQ/12, and set to 5 for RZQ/8.
All other values are reserved.
23
DDR2_DDQS
R/W
0h
DDR2 differential DQS enable.
Set to 0 for single ended DQS.
Set to 1 for differential DQS
766
Control Module
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated