Texas Instruments TMS320C642x DSP manual Interrupt Mask Set Register Imsr

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DDR2 Memory Controller Registers

4.9Interrupt Mask Set Register (IMSR)

The interrupt mask set register (IMSR) enables the DDR2 memory controller interrupt. The IMSR is shown in Figure 27 and described in Table 33.

Note: If the LTMSET bit in IMSR is set concurrently with the LTMCLR bit in the interrupt mask clear register (IMCR), the interrupt is not enabled and neither bit is set to 1.

Figure 27. Interrupt Mask Set Register (IMSR)

31				16
	Reserved
	R-0
15	3	2	1	0
Reserved		LTMSET	Reserved
R-0		R/W-0		R-0

LEGEND: R/W = Read/Write; R = Read only; -n= value after reset

Table 33. Interrupt Mask Set Register (IMSR) Field Descriptions

Bit	Field	Value	Description
31-3	Reserved	0	Reserved
2	LTMSET		Line trap interrupt set. Write a 1 to set LTMSET and the LTMCLR bit in the interrupt mask clear register
			(IMCR); a write of 0 has no effect.
		0	Line trap interrupt is not enabled; a write of 1 to the LTMCLR bit in IMCR occurred.
		1	Line trap interrupt is enabled.
1-0	Reserved	0	Reserved

SPRUEM4A–November 2007	DDR2 Memory Controller	51
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Contents Users Guide Submit Documentation Feedback Contents List of Figures List of Tables Read This First Purpose of the Peripheral FeaturesFunctional Block Diagram Supported Use Case StatementIndustry Standards Compliance Statement Clock Source Clock Control3 DDR2 Memory Controller Internal Clock Domains Clock ConfigurationPLLC2 Configuration Memory MapPin Type Description Signal DescriptionsDDR2 Memory Controller Signal Descriptions Clock enable Active highProtocol Descriptions DDR2 Sdram CommandsTruth Table for DDR2 Sdram Commands Command FunctionRefresh Command Refresh ModeDeactivation Dcab and Deac Dcab CommandDeac Command Activation Actv Actv CommandDDR2 Read Command Read CommandDDR2 WRT Command Write WRT CommandDDR2 MRS and Emrs Command Mode Register Set MRS and EmrsAddressable Memory Ranges Memory Width and Byte AlignmentBit External Memory Endianness SupportBank Configuration Register Fields for Address Mapping 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 SdramLogical Address-to-DDR2 Sdram Address Map DDR2 Sdram Column, Row, and Bank Access DDR2 Memory Controller Fifo Description DDR2 Memory Controller InterfaceCommand Ordering and Scheduling, Advanced Concept Possible Race Condition Command StarvationUrgency Level Description Self-Refresh ModeRefresh Scheduling Refresh Urgency LevelsReset Considerations Reset SourcesReset Signal Reset Source Auto-Initialization Sequence VTP IO Buffer CalibrationDDR2 Memory Controller DDR2 Sdram Configuration by MRS CommandDDR2 Sdram Configuration by EMRS1 Command Initializing Configuration RegistersPeripheral Architecture Power Management Interrupt SupportDMA Event Support Emulation Considerations Supported Use Cases Connecting the DDR2 Memory Controller to DDR2 MemoryConnecting DDR2 Memory Controller for 32-Bit Connection DDR2 Memory Refresh Specification Configuring Sdram Bank Configuration Register SdbcrSdram Bank Configuration Register Sdbcr Configuration Configuring Sdram Refresh Control Register SdrcrDDR2 Data Register Field Manual Data Manual Formula Configuring Sdram Timing Registers Sdtimr and SDTIMR2Sdram Timing Register Sdtimr Configuration Sdram Timing Register 2 SDTIMR2 ConfigurationConfiguring DDR PHY Control Register Ddrphycr DDR PHY Control Register Ddrphycr ConfigurationRegister Field Name Description DDR VTP Register Mode D63-32D31-0 Acronym Register DescriptionSdram Status Register Sdrstat Sdram Status Register Sdrstat Field DescriptionsBit Field Sdram Bank Configuration Register Sdbcr Sdram Bank Configuration Register Sdbcr Field DescriptionsBit Field Value Description Reserved Reserved. Always write a 0 to this bit Sdram Refresh Control Register Sdrcr Field Descriptions Sdram Refresh Control Register SdrcrSdram Timing Register Sdtimr Field Descriptions Sdram Timing Register SdtimrSdram Timing Register 2 SDTIMR2 Field Descriptions Sdram Timing Register 2 SDTIMR2Peripheral Bus Burst Priority Register Pbbpr Peripheral Bus Burst Priority Register PbbprInterrupt Raw Register IRR Field Descriptions Interrupt Raw Register IRRInterrupt Masked Register IMR Field Descriptions Interrupt Masked Register IMRInterrupt Mask Set Register Imsr Field Descriptions Interrupt Mask Set Register ImsrInterrupt Mask Clear Register Imcr Field Descriptions Interrupt Mask Clear Register ImcrDDR PHY Control Register Ddrphycr Field Descriptions DDR PHY Control Register DdrphycrVTP IO Control Register Vtpiocr Field Descriptions VTP IO Control Register VtpiocrDDR VTP Register Ddrvtpr Field Descriptions DDR VTP Enable Register DdrvtperDDR VTP Enable Register Ddrvtper Field Descriptions DDR VTP Register DdrvtprAdditions/Modifications/Deletions Table A-1. Document Revision HistoryImportant Notice