Ddr Memory Device Examples; Example 1: Connecting 32-Bit Ddr2 To Fddr_Pads; Example 2: Connecting 32-Bit Ddr3 To Fddr_Pads With Secded; Figure 98 X16 Ddr2 Sdram Connected To Fddr - Microchip Technology Microsemi SmartFusion2 User Manual

Fabric DDR Subsystem
4.8

DDR Memory Device Examples

This section describes how to connect DDR memories to IGLOO2 FDDR_PADs with examples.
4.8.1

Example 1: Connecting 32-Bit DDR2 to FDDR_PADs

The following illustration shows DDR2 SDRAM connected to the FDDR of a IGLOO2 device. Micron's
MT47H64M16 is a 128 MB density device with x16 data width. The FDDR is configured in Full Bus Width
mode and without SECDED. The total amount of DDR2 memory connected to the FDDR is 256 MB.
Figure 98 • x16 DDR2 SDRAM Connected to FDDR
FDDR_PADS
FDDR_CAS_N
FDDR_CKE
FDDR_CLK
FDDR_CLK_N
FDDR_CS_N
FDDR_ODT
FDDR_IMP_CALIB
FDDR_RAS_N
R
FDDR_WE_N
FDDR_ADDR[12:0]
FDDR_BA[2:0]
FDDR_DM_RDQS[1:0]
FDDR_DQS[1:0]
FDDR_DQS_N[1:0]
FDDR_DQ[15:0]
FDDR_DM_RDQS[3:2]
FDDR_DQS[3:2]
FDDR_DQS_N[3:2]
FDDR_DQ[31:16]
FDDR_DQS_TMATCH_0_IN
FDDR_DQS_TMATCH_0_OUT
FDDR_DQS_TMATCH_1_IN
FDDR_DQS_TMATCH_1_OUT
4.8.2 Example 2: Connecting 32-Bit DDR3 to FDDR_PADs with
SECDED
The following illustration shows DDR3 SDRAM connected to the FDDR of a IGLOO2 device. Micron's
MT41J512M8RA is a 512 MB density device with x8 data width. The FDDR is configured in Full Bus
Width mode with SECDED enabled. The SDRAM connected to FDDR_DQ_ECC[3:0] is used to store
SECDED bits. The total amount of DDR3 memory (excluding memory for SECDED) connected to FDDR
is 2 GB.
Microsemi ProprietaryUG0446 User Guide Revision 7.0
MT47H64M16
CASN
CKE
CLK_P
CLK_N
CSN
ODT
RASN
WEN
ADDR[12:0]
BA[2:0]
DM
UDQS, LDQS
UDQS#, LDQS#
DQ[15:0]
MT47H64M16
CASN
CKE
CLK_P
CLK_N
CSN
ODT
RASN
WEN
ADDR[12:0]
BA[2:0]
DM
UDQS, LDQS
UDQS#, LDQS#
DQ[15:0]
173