DDR memory controller (MPMC)
RM0082
172/844
Doc ID 018672 Rev 1
10.13.38 MEM35_CTL
register
10.13.39 MEM36_CTL
register
10.13.40 MEM37_CTL
register
Table 111.
MEM35_CTL register bit assignments
Bit
Name
Reset
value
Range
Description
[31:28] -
-
-
Reserved. Read undefined. Write should be zero.
[27:24] MAX_ROW
0xF
0x0 - 0xF
Maximum width of memory addresses bus.
READ-ONLY
[23:20] -
-
-
Reserved. Read undefined. Write should be zero.
[19:16] MAX_COL
0xE
0x0 - 0xE
Maximum width of column address in DRAMs.
READ-ONLY
[15:12] -
-
-
Reserved. Read undefined. Write should be zero.
[11:08] INITAREF
0x0
0x0 - 0xF
Number of auto-refresh CMDs to execute during
DRAM initialization.
[07:06] -
-
-
Reserved. Read undefined. Write should be zero.
[05:00]
COMMAND_AGE
_COUNT
0x00
0x0 - 0x3F
Initial value of individual CMD aging counters for
CMD aging.
Table 112.
MEM36_CTL register bit assignments
Bit
Name
Reset
value
Range
Description
[31:28] -
-
-
Reserved. Read undefined. Write should be zero.
[27:24]
WRR_PARAM_VA
LUE_ERR
0x0
0x0 - 0xF
Errors/warnings related to the WRR parameters.
READ-ONLY
[23:20] -
-
-
Reserved. Read undefined. Write should be zero.
[19:16] TRP
0x0
0x0 - 0xF
DRAM TRP parameter in cycles.
[15:12] -
-
-
Reserved. Read undefined. Write should be zero.
[11:08] TDAL
0x0
0x0 - 0xF
DRAM TDAL parameter in cycles.
[07:04] -
-
-
Reserved. Read undefined. Write should be zero.
[03:00] Q_FULLNESS
0x0
0x0 - 0xF
Quantity that determines CMD queue full.
Table 113.
MEM37_CTL register bit assignments
Bit
Name
Reset
value
Range
Description
[31:29] -
-
-
Reserved. Read undefined. Write should be
zero.
[28:24] TFAW
0x0
0x0 - 0x1F DRAM TFAW parameter in cycles.