EMIF
7.3.6 DDR2/3/mDDR PHY Registers
lists the memory-mapped registers for the DDR2/3 mDDR PHY. Configure the DDR PHY
Control Register for calibration of board delay and other parameters to get the SDRAM device working at
a different speed.
Note: These registers are write-only due to a silicon bug. The contents of these registers cannot be read.
Table 7-149. Memory-Mapped Registers for DDR2/3/mDDR PHY
Register Name
Type
Register
Register
Address
Description
Reset
Offset
CMD0_REG_PHY_CTRL_SLAVE_RATIO_0
W
DDR PHY Command
0x80
0x01C
0 Address/Command
Slave Ratio Register
CMD0_REG_PHY_DLL_LOCK_DIFF_0
W
DDR PHY Command
0x4
0x028
0 Address/Command
DLL Lock Difference
Register
CMD0_REG_PHY_INVERT_CLKOUT_0
W
DDR PHY Command
0x0
0x02C
0 Invert Clockout
Selection Register
CMD1_REG_PHY_CTRL_SLAVE_RATIO_0
W
DDR PHY Command
0x80
0x050
1 Address/Command
Slave Ratio Register
CMD1_REG_PHY_DLL_LOCK_DIFF_0
W
DDR PHY Command
0x4
0x05C
1 Address/Command
DLL Lock Difference
Register
CMD1_REG_PHY_INVERT_CLKOUT_0
W
DDR PHY Command
0x0
0x060
1 Invert Clockout
Selection Register
CMD2_REG_PHY_CTRL_SLAVE_RATIO_0
W
DDR PHY Command
0x80
0x084
2 Address/Command
Slave Ratio Register
CMD2_REG_PHY_DLL_LOCK_DIFF_0
W
DDR PHY Command
0x4
0x090
2 Address/Command
DLL Lock Difference
Register
CMD2_REG_PHY_INVERT_CLKOUT_0
W
DDR PHY Command
0x0
0x094
2 Invert Clockout
Selection Register
DATA0_REG_PHY_RD_DQS_SLAVE_RATIO
W
DDR PHY Data Macro
0x04010040
0x0C8
_0
0 Read DQS Slave
Ratio Register
DATA0_REG_PHY_WR_DQS_SLAVE_RATI
W
DDR PHY Data Macro
0x0
0x0DC
O_0
0 Write DQS Slave
Ratio Register
DATA0_REG_PHY_WRLVL_INIT_RATIO_0
W
DDR PHY Data Macro
0x0
0x0F0
0 Write Leveling Init
Ratio Register
DATA0_REG_PHY_WRLVL_INIT_MODE_0
W
DDR PHY Data Macro
0x0
0x0F8
0 Write Leveling Init
Mode Ratio Selection
Register
DATA0_REG_PHY_GATELVL_INIT_RATIO_0
W
DDR PHY Data Macro
0x0
0x0FC
0 DQS Gate Training
Init Ratio Register
DATA0_REG_PHY_GATELVL_INIT_MODE_0
W
DDR PHY Data Macro
0x0
0x104
0 DQS Gate Training
Init Mode Ratio
Selection Register
DATA0_REG_PHY_FIFO_WE_SLAVE_RATI
W
DDR PHY Data Macro
0x0
0x108
O_0
0 DQS Gate Slave
Ratio Register
467
SPRUH73H – October 2011 – Revised April 2013
Memory Subsystem
Copyright © 2011–2013, Texas Instruments Incorporated