Texas Instruments TMS320DM643X DMP manual Divisor LSB Latch DLL Field Descriptions

Page 34

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Figure 17. Divisor LSB Latch (DLL)

31				16
	Reserved

		R-0
15	8	7		0

	Reserved			DLL

	R-0			R/W-0

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

			Table 18. Divisor LSB Latch (DLL) Field Descriptions

Bit	Field	Value	Description

31-8	Reserved	0	Reserved

7-0	DLL	0-Fh	The 8 least-significant bits (LSBs) of the 16-bit divisor for generation of the baud clock in the baud rate
			generator. Maximum baud rate is 128 kbps.

Figure 18. Divisor MSB Latch (DLH)

31				16
	Reserved

		R-0
15	8	7		0

	Reserved			DLH

	R-0			R/W-0

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

			Table 19. Divisor MSB Latch (DLH) Field Descriptions

Bit	Field	Value	Description

31-8	Reserved	0	Reserved

7-0	DLH	0-Fh	The 8 most-significant bits (MSBs) of the 16-bit divisor for generation of the baud clock in the baud rate
			generator. Maximum baud rate is 128 kbps.

34	Universal Asynchronous Receiver/Transmitter (UART)	SPRU997C –December 2009
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Copyright © 2009, Texas Instruments Incorporated

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Contents Users Guide Submit Documentation Feedback Revision History Appendix aList of Figures List of Tables Read This First Features Purpose of the PeripheralFeature Support Functional Block DiagramUart Supported Features/Characteristics by Instance Industry Standards Compliance StatementUart Block Diagram FifoDlhdll Clock Generation and ControlUart BclkBaud Rate Examples for 27 MHz Uart Input Clock Baud Rate Divisor Value Actual Baud Rate Error %Start Parity STOP1 STOP2 Pin Multiplexing Signal DescriptionsProtocol Description Parity STOP1 Endianness ConsiderationsData Format ParityOperation Character Time for Word Lengths Fifo ModesCharacter Time Four Character Times Uart Interface Using Autoflow Diagram Autoflow ControlAutoflow Functional Timing Waveforms for RTS Loopback ControlInitialization Reset ConsiderationsInterrupt Support Uart Interrupt Request Interrupt Source Enable bitsUart Interrupt Requests Descriptions CommentDMA Event Support Power ManagementEmulation Considerations Divisor Latch Not Programmed Changing Operating Mode During Busy Serial CommunicationException Processing Uart RegistersReceiver Buffer Register RBR Field Descriptions Access considerationsReceiver Buffer Register RBR Bit FieldTransmitter Holding Register THR Field Descriptions Transmitter Holding Register THRBit Field Value Description Elsi Etbei Erbi Interrupt Enable Register IERInterrupt Enable Register IER Field Descriptions ElsiInterrupt Identification Register IIR Access considerationInterrupt Identification Register IIR Field Descriptions IIR Bits Fifo Control Register FCRInterrupt Identification and Interrupt Clearing Information Interrupt Type Interrupt SourceDMAMODE11 Txclr Rxclr Fifoen Fifo Control Register FCR Field DescriptionsRxfiftl DMAMODE1Dlab EPS PEN STB WLS Line Control Register LCRLine Control Register LCR Field Descriptions DlabST Bit EPS Bit PEN Bit Parity Option Relationship Between ST, EPS, and PEN Bits in LCRNumber of Stop Bits Generated STB BitLoop Modem Control Register MCRModem Control Register MCR Field Descriptions AFELine Status Register LSR Non-FIFO modeFifo mode Line Status Register LSR Field DescriptionsSet Elsi = 1 in IER, an interrupt request is generated Divisor Latches DLL and DLH Register RBRDivisor LSB Latch DLL Field Descriptions Divisor MSB Latch DLH Field DescriptionsCLS Peripheral Identification Registers PID1 and PID2CLS REV TYPFree Power and Emulation Management Register PwremumgmtUtrst Urrst UtrstDocument Revision History Reference Additions/Modifications/DeletionsImportant Notice

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