DDR memory controller (MPMC)
RM0082
190/844
Doc ID 018672 Rev 1
dll_lock [9:0]
Shows the actual number of delay elements used to capture one full
clock cycle. This parameter is automatically updated every time a
refresh operation is performed. This parameter is read-only.
dll_start_point [9:0]
Sets the number of delay elements to place in the master delay line to
start searching for lock in master DLL.
dlllockreg [0]
DLL lock/unlock. This parameter is read-only.
dqs_n_en [0]
Enables differential data strobe signals from the DRAM.
1'b0 - Single-ended DQS signal from the DRAM.
1'b1 - Differential DQS signal from the DRAM.
dqs_out_shift [6:0]
Sets the delay for the clk_dqs_out signal of the ddr_close to ensure
correct data capture in the I/O logic. Each increment of this parameter
adds a delay of 1/128 of the system clock.
(5)
dqs_out_shift_bypass [9:0]
Sets the delay for the clk_dqs_out signal of the ddr_close when the DLL
is being bypassed. This is used to ensure correct data capture in the
I/O logic.
The value programmed into this parameter sets the actual number of
delay elements in the clk_dqs_out line. If the total delay time
programmed exceeds the number of delay elements in the delay chain,
the delay will be set internally to the maximum number of delay
elements available.
(6)
drive_dq_dqs [0]
Selects whether the DQ output enables and DQS output enables will be
driven active when the Memory Controller is in idle state.
1'b0 - Leave the output enables de-asserted when idle.
1'b1 - Drive the output enables active when idle.
eight_bank_mode [0].
Reports that the memory devices have eight banks.
1'b0 - Memory devices have 4 banks.
1'b1 - Memory devices have 8 banks
emrs1_data [14:0]
Holds the EMRS1 data written during DDRII initialization. The contents
of this parameter will be programmed into the DRAM at initialization or
when the write_modereg parameter is set to 1'b1. Consult the DRAM
specification for the correct settings of this parameter.
emrs2_data_X [14:0]
Holds the EMRS2 data written during DDRII initialization for chip select
X. The contents of this parameter will be programmed into the DRAM at
initialization or when the write_modereg parameter is set to 1'b1.
Consult the DRAM specification for the correct settings for this
parameter.
emrs3_data [14:0]
Holds the EMRS3 data written during DDRII initialization. The contents
of this parameter will be programmed into the DRAM at initialization or
when the write_modereg parameter is set to 1'b1. Consult the DRAM
specification for the correct settings for this parameter.
en_lowpower_mode [0]
Enables the mobile mode of the Memory Controller.
(7)
1'b0 - Disabled
1'b1 - Enabled
Table 153.
Memory controller parameters (continued)
Parameter
Description