DDR memory controller (MPMC)
RM0082
174/844
Doc ID 018672 Rev 1
10.13.43 MEM40_CTL
register
10.13.44 MEM41_CTL
register
10.13.45 MEM42_CTL
register
[07]
-
-
-
Reserved. Read undefined. Write should be zero.
[06:00]
DLL_DQS_DELA
0
0x0
0x0 - 0x7F
Fraction of a cycle to delay the dqs signal from the
DRAMs for dll_rd_dqs_slice 0 during READs.
Table 115.
MEM39_CTL register bit assignments (continued)
Bit
Name
Reset
value
Range
Description
Table 116.
MEM40_CTL register bit assignments
Bit
Name
Reset
value
Range
Description
[31]
-
-
-
Reserved. Read undefined. Write should be zero.
[30:24]
DQS_OUT_
SHIFT
0x0
0x0 - 0x7F
Fraction of a cycle to delay the write dqs signal to the
DRAMs during WRITEs.
[23:00] -
-
-
Reserved. Read undefined. Write should be zero.
Table 117.
MEM41_CTL register bit assignments
Bit
Name
Reset
value
Range
Description
[31:23] -
-
-
Reserved. Read undefined. Write should be zero.
[22:16] WR_DQS_SHIFT
0x0
0x0 - 0x7F
Fraction of a cycle to delay the ddr_close signal in
the controller.
[15:00] -
-
-
Reserved. Read undefined. Write should be zero.
Table 118.
MEM42_CTL register bit assignments
Bit
Name
Reset
value
Range
Description
[31:24] TRFC
0x0
0x0 - 0xFF
DRAM TRFC parameter in cycles.
[23:16] TRCD_INT
0x0
0x0 - 0xFF
DRAM TRCD parameter in cycles.
[15:08] TRAS_MIN
0x0
0x0 - 0xFF
DRAM TRAS_MIN parameter in cycles.
[07:00] -
-
-
Reserved. Read undefined. Write should be zero.