DS643 Datasheet, PDF (8/216 Pages) Xilinx, Inc – Soft Direct Memory Access (SDMA) support

LogiCORE IP Multi-Port Memory Controller (v6.06.a)
Table 3: Memory and Memory Part Parameters (Cont’d)
Parameter Name
Default Value Allowable Values
Description
C_MEM_NDQS_COL1^(10),(16)
0
0-18
Number of DQS groups in I/O column obtain
value from MIG tool.
C_MEM_NDQS_COL2^(10),(16)
0
0-18
Number of DQS groups in I/O column obtain
value from MIG tool.
C_MEM_NDQS_COL3^(10),(16)
0
0-18
Number of DQS groups in I/O column obtain
value from MIG tool.
C_MEM_NUM_DIMMS
1
1
Number of DIMMs. Set to 1 if not using a
DIMM. Multiple DIMMs are not supported.
C_MEM_NUM_RANKS^(7),(12)
1
1-2
Number of ranks per DIMM. Single rank
DIMMs are recommended.
C_MEM_ODT_TYPE⁽¹³⁾
C_MEM_ODT_WIDTH^{(3), (11),(12)}
On-Die Termination Setting (DDR2/DDR3
only):
DDR2 Memory:
0 = Disabled
1 = 75 Ω
2 = 150 Ω
3 = 50 Ω
0
0-5
4-5 = Reserved
DDR3 Memory:
0 = Disabled
1 = RZQ/4 (60 Ω)
2 = RZQ/2 (120 Ω)
3 = RZQ/6 (40 Ω)
4 = RZQ/12 (20 Ω)
5 = RZQ/8 (30 Ω)
Number of external ODT pins. This value is
an automatically calculated parameter that
1
1-16
can be overwritten; if set by the user, it is not
calculated. This must be set to an integer
multiple of C_NUM_RANKS * C_NUM_DIMMS.
C_MEM_PA_SR⁽⁹⁾
Partial Array Self Refresh (DDR2, DDR3,
0
0,1
LPDDR only.)
0 = Full
1 = Half
C_MEM_PARTNO⁽¹⁾
NONE
Database Part Number,
Example:
“mt4htf3264h-53e”,
CUSTOM
Specifies the memory part number from
database or CUSTOM. The CUSTOM value is
not supported for Spartan-6 FPGAs.
C_MEM_PART_CAS_A^(1),(4)
Memory CAS latency to be used up to a
x
Any Integer
maximum memory frequency specified with
C_MEM_PART_CAS_A_FMAX.
C_MEM_PART_CAS_A_FMAX^(1),(4)
Maximum memory frequency of
x
Any Integer
C_MEM_PART_CAS_A. Must be equal or less
than C_MEM_PART_CAS_B/C/D.
C_MEM_PART_CAS_B^(1),(4)
Memory CAS latency to be used up to a
x
Any Integer
maximum memory frequency specified with
C_MEM_PART_CAS_B_FMAX.
C_MEM_PART_CAS_B_FMAX^(1),(4)
Maximum memory frequency of
x
Any Integer
C_MEM_PART_CAS_B. Must be equal or
less than C_MEM_PART_CAS_C/D.
C_MEM_PART_CAS_C^(1),(4)
Memory CAS latency to be used up to a
x
Any Integer
maximum memory frequency specified with
C_MEM_PART_CAS_C_FMAX.
C_MEM_PART_CAS_C_FMAX^(1),(4)
Maximum memory frequency of
x
Any Integer
C_MEM_PART_CAS_C. Must be equal or less
than C_MEM_PART_CAS_D.
C_MEM_PART_CAS_D^(1),(4)
Memory CAS latency to be used up to a
x
Any Integer
maximum memory frequency specified with
C_MEM_PART_CAS_D_FMAX (if applicable).
DS643 February 22, 2013
www.xilinx.com
8
Product Specification