Texas Instruments TMS320DM643 specification

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Supported Use Cases

Figure 17. Connecting DDR2 Memory Controller for 32-Bit Connection

	DDR_CLK
	DDR_CLK
	DDR_CKE
DDR2	DDR_CS
memory	DDR_WE
controller	DDR_WE
controller	DDR_RAS
	DDR_CAS
DDR_DQM[0]
DDR_DQM[1]
DDR_DQS[0]
DDR_DQS[1]
DDR_BA[2:0]
DDR_A[12:0]
DDR_D[15:0]
DDR_DQM[2]
DDR_DQM[3]
DDR_DQS[2]
DDR_DQS[3]
DDR_D[31:16]
	DDR_ZN
	DDR_ZP
	200 Ω	200 Ω

CK

CK

CKE

DDR2

CS memory

WE x16−bit

RAS

CAS

LDM

UDM

LDQS

UDQS

BA[2:0]

A[12:0]

DQ[15:0]

CK

CK

CKE

DDR2

CS memory

WE x16−bit

RAS

CAS

LDM

UDM

LDQS

UDQS

BA[2:0]

A[12:0]

DQ[15:0]

Figure 18. Connecting DDR2 Memory Controller for 16-Bit Connection

DDR_CLK

DDR_CLK DDR_CKE

CK

CK

CKE

DDR2

DDR2

DDR_CS

CS memory

memory DDR_WE controller DDR_RAS

DDR_CAS

DDR_DQM[0]

DDR_DQM[1]

DDR_DQS[0]

DDR_DQS[1]

DDR_BA[2:0]

DDR_A[12:0]

DDR_D[15:0]

DDR_ZN

DDR_ZP

200Ω

200Ω

WE x16−bit

RAS

CAS

LDM

UDM

LDQS

UDQS

BA[2:0]

A[12:0]

DQ[15:0]

SPRU986B–November 2007

DDR2 Memory Controller

37

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Texas Instruments TMS320DM643 manual Connecting DDR2 Memory Controller for 32-Bit Connection

Contents

Users Guide Submit Documentation Feedback Contents List of Figures List of Tables Read This First Purpose of the Peripheral Features Supported Use Case Statement Functional Block DiagramIndustry Standards Compliance Statement Clock Source Clock Control PLLC2 Configuration Clock ConfigurationMemory Map 3 DDR2 Memory Controller Internal Clock Domains DDR2 Memory Controller Signal Descriptions Signal DescriptionsClock enable Active high Pin Type Description Truth Table for DDR2 Sdram Commands DDR2 Sdram CommandsCommand Function Protocol Descriptions Refresh Command Refresh Mode Deactivation Dcab and Deac Dcab Command Deac Command Activation Actv Actv Command DDR2 Read Command Read Command DDR2 WRT Command Write WRT Command DDR2 MRS and Emrs Command Mode Register Set MRS and Emrs Addressable Memory Ranges Memory Width and Byte Alignment Bit External Memory Endianness ConsiderationsInternal Data 64-Bit DDRA21 DDRD150 Internal Data 64-Bit DDRA2 DDRD310 Address Mapping Bank Configuration Register Fields for Address MappingBit Field Bit Value Bit Description Logical Address-to-DDR2 Sdram Address Map for 16-bit Sdram Logical Address-to-DDR2 Sdram Address Map for 32-Bit Sdram Logical Address-to-DDR2 Sdram Address Map DDR2 Sdram Column, Row, and Bank Access DDR2 Memory Controller Fifo Description DDR2 Memory Controller Interface Command Ordering and Scheduling, Advanced Concept Possible Race Condition Command Starvation Refresh Scheduling Self-Refresh ModeRefresh Urgency Levels Urgency Level Description Reset Sources Reset ConsiderationsReset Signal Reset Source Auto-Initialization Sequence VTP IO Buffer Calibration DDR2 Sdram Configuration by EMRS1 Command DDR2 Sdram Configuration by MRS CommandInitializing Configuration Registers DDR2 Memory Controller Peripheral Architecture Interrupt Support Power ManagementDMA Event Support Emulation Considerations Supported Use Cases Connecting the DDR2 Memory Controller to DDR2 Memory Connecting DDR2 Memory Controller for 32-Bit Connection Sdram Bank Configuration Register Sdbcr Configuration Configuring Sdram Bank Configuration Register SdbcrConfiguring Sdram Refresh Control Register Sdrcr DDR2 Memory Refresh Specification Sdram Timing Register Sdtimr Configuration Configuring Sdram Timing Registers Sdtimr and SDTIMR2Sdram Timing Register 2 SDTIMR2 Configuration DDR2 Data Register Field Manual Data Manual Formula DDR PHY Control Register Ddrphycr Configuration Configuring DDR PHY Control Register DdrphycrRegister Field Name Description D63-32 Sdram Status Register Sdrstat Field Descriptions Sdram Status Register SdrstatAcronym Register Description DDR VTP Register Sdram Bank Configuration Register Sdbcr Field Descriptions Sdram Bank Configuration Register SdbcrBit Field Value Description Reserved Reserved. Always write a 0 to this bit Sdram Refresh Control Register Sdrcr Field Descriptions Sdram Refresh Control Register Sdrcr Sdram Timing Register Sdtimr Field Descriptions Sdram Timing Register Sdtimr Sdram Timing Register 2 SDTIMR2 Field Descriptions Sdram Timing Register 2 SDTIMR2 Peripheral Bus Burst Priority Register Pbbpr Peripheral Bus Burst Priority Register Pbbpr Interrupt Raw Register IRR Field Descriptions Interrupt Raw Register IRR Interrupt Masked Register IMR Field Descriptions Interrupt Masked Register IMR Interrupt Mask Set Register Imsr Field Descriptions Interrupt Mask Set Register Imsr Interrupt Mask Clear Register Imcr Field Descriptions Interrupt Mask Clear Register Imcr DDR PHY Control Register Ddrphycr Field Descriptions DDR PHY Control Register Ddrphycr VTP IO Control Register Vtpiocr Field Descriptions VTP IO Control Register Vtpiocr DDR VTP Enable Register Ddrvtper Field Descriptions DDR VTP Enable Register DdrvtperDDR VTP Register Ddrvtpr DDR VTP Register Ddrvtpr Field Descriptions Additions/Modifications/Deletions Table A-1. Document Revision History Important Notice